2 ADMINISTRATIVE RULES

 

 

 

DE PARTMEN T OF CONSU MER AND INDUS TRY SER VIC ES DIRECTO R’S OFF ICE

OCC U PATIO NAL HEALT H STAND ARDS --AI R CONTAMI NANTS

 

Filed with th e Secretar y of Stat e on April 23, 2001 .

These ru les tak e effect 15 days after fili ng with th e Secretar y of Stat e

 

(By auth ority conferr ed on th e director of th e dep artm ent of con sum er an d industr y services by sections 14 an d 24 of 1974 PA 154 , MCL 408 .1014 an d 408 .1024  an d  Execut ive Reorgan izat ion Order Nos. 1996 -1 an d 1996 -2, MCL 330 .3101 an d 445 .2001 )

 

R 325 .51102 , R 325 .51103 , R 325 .51104 , R 325 .51105 , an d R 325 .51108 ar e am ended an d R

325 .51106 is rescinded of th e Michigan Administrat ive Code as follows:

 

R 325 .51102   De finitio ns.

Rule 2.  As used in th ese ru les:

(a)  “Ceili ng” mean s th e employee' s exposur e which sha ll not be exceeded dur ing an y part of th e work day.   If instantan eous  monitoring is  not feasible,  th en  th e ceiling sha ll be  assessed as a 15-minut e, time-weig ht ed  avera ge  exposur e  which  sha ll  not  be  exceeded  dur ing  an y part  of th e working day.

(b)  “Skin designat ion” mean s those subs tan ces so indicat ed that ha ve toxic effect s due to absorption thr ough an employee’s skin.

(c)  “Short-term exposur e limit (STEL)” mean s th e employee' s 15-minut e, time-weig ht ed avera ge exposur e which sha ll not be exceeded  at  an y  time  dur ing  a  work day,  un less anoth er time limit is specified in a par enth etical notat ion below th e limit. If anoth er time period is specified, th en th e time-weig ht ed avera ge exposur e over that time limit sha ll not be exceeded at an y time dur ing th e work day.

(d)  “Time-weig ht ed avera ge (TWA)” mean s th e employee' s avera ge airborn e exposur e in an y 8-hour workshift of a 40-hour workwee k that  sha ll not be exceeded .

(e)  The term s “subs tan ce” an d “air contam inant ” ar e equivalent in mean ing for pur poses of th ese  rules.

 

R 325 .51103   Expos ure li mits .

Rule 3. An employer sha ll ensur e that  an employee exposur e to an y subs tan ce listed in ta bles G-1-A or G-2 in R 325 .51108 is limited in accor dance with th e requirement s of all of th e followi ng provisions:

(a)  With respe ct to ta ble G-1-A, all of th e followi ng provisions apply:

(i)   Removed (dat e).

(ii)    Removed (dat e).

 

(iii)     An  employee' s  exposur e to an y substan ce listed  in  ta ble  G-1-A sha ll not  exceed  th e t ime-weight ed avera ge (TWA) limit, short -term exposur e limit (STEL) an d ceiling limit specified for that  substan ce in ta ble G-1-A.

(iv)    To prevent or reduce skin absorption, an employee' s skin exposur e to substan ces listed in ta ble G-1-A with an “X” in th e sk in des ignat ion column followin g th e substan ce nam e sha ll be prevent ed or reduced to th e extent necess ar y thr ough th e use of gloves, covera lls, goggles, or oth er appropriat e persona l protective equipment , engineering contr ols, or work pra ctices.

(v)    An employee sha ll not be exposed to air concentrat ions between th e TWA an d STEL limits more than 4 t imes in a work shift an d such exposur es sha ll be no less than 60 minut es apart .

(b) With respe ct to ta ble G-2, all of th e followin g provisions apply:

(i)   An employee' s exposur e to an y substan ce listed in ta ble G-2 in an y 8-hour work shift of a 40-hour work week sha ll not exceed th e 8-hour , t ime-weight ed avera ge limit given for that substan ce in ta ble G-2.

(ii)    An employee' s exposur e to a substan ce listed in ta ble G-2 sha ll not exceed , at an y t ime dur ing an 8-hour work shift, th e a ccep ta ble ceiling con centrat ion limit  given  for  th e substan ce in th e ta ble, except for a period of t ime an d up to a con centrat ion that does not exceed th e ma ximum durat ion an d con centrat ion a llowed in th e column un der "Accep ta ble ma ximum peak above th e ceiling concentrat ion  for  an  8-hour  work shift."  For  exam ple, dur ing an 8-hour work shift, an employee ma y be exposed to a con centrat ion of substan ce A (with a 10 part s of th e substan ce per million part s of air (ppm) TWA, 25 ppm ceiling an d 50 ppm peak ) above 25 ppm (but not above 50 ppm) only for a ma ximum period of 10 minut es. Such an exposur e sha ll be com pensat ed for by exposur es to con centrat ions less than 10 ppm so th e cumu lat ive exposur e for th e ent ire 8-hour work shift does not exceed a t ime-weight ed avera ge of 10 ppm.

(iii)     If a substan ce is preceded by an “S”, th en an employer  sha ll  tak e  th e  necess ar y precaut ions to prevent an employee from absorbing th e substan ce thr ough his or her sk in.

 

R 325 .51104   Computation   formu lae .

Rule 4. The com putat ion formu las that sha ll apply to employee exposur e to one or more substan ces that ha ve an 8-hour , t ime-weight ed avera ge listed in ta ble G-1-A or  G-2  to determ ine wheth er an employee is exposed in excess of th e exposur e limit ar e as follows :

(a)    An employer sha ll com put e th e cumu lat ive exposur e for mu lt iple exposur es to a single substan ce for an 8-hour work shift as follows :

E = (C 1T1 + C 2T2 + ... Cn Tn) â 8 hour s

Where:          E         is th e cumu lat ive exposur e for an 8-hour work shift.

C1           is th e substan ce con centrat ion  dur ing  th e  fir st  period  of  t ime  “T”  where  th e con centrat ion rema ins con stant .

C2           is th e substan ce con centrat ion  dur ing  th e  se con d  period  of t ime  “T”  where  th e con centrat ion rema ins con stant .

T      is  th e  period  of t ime  in  hour s  for  wh ich  th e  substan ce  concentrat ion  C  rema ins con stant .

The value of E sha ll not exceed th e 8-hour , t ime-weight ed avera ge limit for th e substan ce as specified in ta ble G-1-A or G-2.

 

To illustrat e th e formu la for a cumu lat ive exposur e to a single substan ce, assum e that substan ce A ha s an 8-hour , t ime-weight ed avera ge exposur e limit of 100 ppm noted in ta ble G-1-A. Assum e that an employee  is  subject  to th e  followin g exposur es  over  an  8-hour work shift:

Two hour s' exposur e at 150 ppm Two hour s' exposur e at 75 ppm Four hour s' exposur e at 50 ppm

Substitut ing th is in format ion int o th e formu la:

E = [(150 ppm X 2 hr s) + (75 ppm X 2 hr s) + (50 ppm X 4 hr s)] / 8 hr s E = [300 ppm·hr s + 150 ppm·hr s + 200 ppm·hr s] / 8 hr s

E = 650 ppm·hr s / 8 hr s = 81.25 ppm

Since th e cumu lat ive exposur e of 81.25 ppm is less than  th e exposur e limit of 100 ppm, th en th e employee’s 8-hour work shift exposur e is a ccep ta ble.

(b)      An employer sha ll com put e th e equivalent exposur e for a mixtur e of air contam inant s for an 8-hour work shift as follows :

E m  = (C 1 â L 1 + C 2 â L 2) + ... (Cn  â Ln)

Where:         E m                is th e equivalent exposur e to th e mixtur e of air contam inant s dur ing an 8-hour work shift.

C1           is th e avera ge 8-hour con centrat ion of th e fir st substan ce.

C2           is th e avera ge 8-hour con centrat ion of th e se con d substan ce.

L          is th e 8-hour , TWA exposur e limit for that  part icular substan ce. The value of E m  sha ll not exceed a value of one (1.0).

To illustrat e th e formu la for a mixtur e of air contam inant s, assum e th e followin g exposur es:

Substan ces in mixtur e	Avera ge concentrat ion of 8-hour exposur e (C)	8-hour TWA exposur e limit (L)
Substan ce A	500 ppm	1,000 ppm
Substan ce B	45 ppm	200 ppm
Substan ce D	40 ppm	200 ppm

 

Substitut ing th is in format ion int o th e formu la:

E M  = (500 ppm / 1,000 ppm) + (45 ppm / 200 ppm) + (40 ppm / 200 ppm) E m  = 0.500 + 0.225 + 0.200

E m  = 0.925

Since th e value of Em  did not exceed one (1.0), th e employee’s 8-hour work shift exposur e to th e mixtur e of air contam inant s is a ccep ta ble.

 

R 325 .51105    Me thods  of comp li ance .

Rule 5. To achieve complian ce with th e provisions of R 325 .51103 an d R 325 .51104 , administrat ive or engineering contr ols sha ll fir st be determ ined an d implement ed when feasible. If such contr ols ar e not feasible to achieve full com plian ce, th en persona l protective equipment or an y oth er protective measur es sha ll be used to keep th e employee’s exposur e to air contam inant s with in th e exposur e limits prescribed in th ese ru les. Any equipment an d techn ical measur es used  for  th is  pur pose  sha ll  be  approved  for  each part icular  use  by a  com petent  industr ia l hygienist  or  oth er  techn ically qua lified  person.

 

When a respi rat or is used , it s use sha ll com ply with  th e provisions of R 325 .60051  et seq. respi rat ory protection, part 451 .

R 325 .51106    Resc ind (date ). R 325 .51108         Tab les .

Rule 8.  Tables G-1-A an d G-2 read as follows :

 

TABLE G-1-A. EXPOSURE LIMITS FOR AIR CONTAMINANTS
			TWA		STELD		Ceiling
Substan ce		CAS N o.A	ppm B	mg/m 3C	Ppm B	mg/m 3 C	ppm B	mg/m 3C	Skin De- signat io n
Abat e			–	15	–	–	–	–	–
Aceta ldehyde		75-07-0	100	180	150	270	–	–	–
Acet ic acid		64-19-7	10	25	–	–	–	–	–
Acet ic anh ydride		108 -24-7	–	–	–	–	5	20	–
Acet on e		67-64-1	750	1800	1000	2400	–	–	–
Acet onitr ile		75-05-8	40	70	60	105	–	–	–
2- Acetylam inofluorine; see O.H. ru le 2301 (1)F		53-96-3
Acetylene dichloride; see                           1,2- Dichloroeth ylen e
Acetylen e tetra bromide		79-27-6	1	14	–	–	–	–	–
Acet ylsalicylic (Asp ir in)	acid	50-78-2	–	5	–	–	–	–	–
Acr olein		107 -02-8	0.1	0.25	0.3	0.8	–	–	–
Acr ylam ide		79-06-1	–	0.03	–	–	–	–	x
Acr ylic acid		79-10-7	10	30	–	–	–	–	x
Acrylonitr ile; see   R   325 .515 seq.F	01   et	107 -13-1	2	4.34	10	21.7
Aldrin		309 -00-2	–	0.25	–	–	–	–	x
Allyl alcohol		107 -18-6	2	5	4	10	–	–	x
Allyl chloride		107 -05-1	1	3	2	6	–	–	–
Allyl    glycidyl       eth er (AGE )		106 -92-3	5	22	10	44	–	–	–
Allyl propyl disulfide		2179 -59-1	2	12	3	18	–	–	–
「Alum ina   (alum inum		1344 -28-1	–	5	–	–	–	–	–
oxide)
Respi ra ble fra ct ion			–	10	–	–	–	–	–
Tota l dust
Alum inum (as Al)		7429 -90-5	-	2	-	-	-	-	-
Alkyls
Meta l			–		–	–	–	–	–
Respi ra ble dust			–	5	–	–	–	–	–
Tota l dust			–	15	–	–	–	–	–
Pyro powde r s			–	5	–	–	–	–	–
Soluble salts			–	2	–	–	–	–	–
Welding fum es*			–	5	–	–	–	–	–
4-Aminodiphenyl; see O.H. ru le 2301 (2)F		92-67-1

 

 

2-Aminoethan ol;    see Ethan olam ine
2-Aminopyridine	504 -29-0	0.5	2	–	–	–	–	–
Amitr ole	61-82-5	–	0.2	–	–	–	–	–
Amm onia	7664 -41-7	–	–	35	27	–	–	–
Amm onium        chloride fum e	12125 -02-9	–	10	–	20	–	–	–
Amm on ium sulfamat e	7773 -06-0	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
n -Am yl acetat e	628 -63-7	100	525	–	–	–	–	–
sec-Amyl acetat e	626 -38-0	125	650	–	–	–	–	–
Aniline                     an d h om ologu es	62-53-3	2	8	–	–	–	–	x
Anisidine  (o-  an d  p- isomers)	29191 -52-4	–	0.5	–	–	–	–	x
Ant imony             an d compoun ds (as Sb)	7440 -36-0	–	0.5	–	–	–	–	–
ANTU                  (alpha - na phth ylth iour ea)	86-88-4	–	0.3	–	–	–	–	–
Arsenic,              organ ic compoun ds (as As)	7440 -38-2	–	0.5	–	–	–	–	–
Arsenic,           inorgan ic compoun ds (as       As);       see       R 325 .51601 et seq.F	7440 -38-2		0.01
Arsine	7784 -42-1	0.05	0.2	–	–	–	–	–
		TWA		STEL
Asbes tos;      see        R 325 .51311 et seq.F	Var ies	0.2f/cc		1f/cc
		ppm B	mg/m 3C	Ppm B	mg/m 3 C
Atra zine	1912 -24-9	–	5	–	–	–	–	–
Azinphos-meth yl	86-50-0	–	0.2	–	–	–	–	x
Bar ium ,              Soluble compoun ds (as Ba)	7440 -39-3	–	0.5	–	–	–	–	–
Bar ium sulfat e	7727 -43-7	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
Ben om yl	17804 -35-2	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
Ben zen eE;        see       R 325 .77101 et seq.F  an d ta ble G-2 for limit s applicable         in       th e operat ions or sectors excluded in R 325 .77101 E	71-43-2	1	3.19	5	15.97
Benzidine;   see   O.H. ru le 2301 (3)	92-87-5
p-Ben zoqu in on e;   see Qu in on e
Ben zo(a )pyr en e;        see Coal tar

 

 

pitch volat iles
Benzoyl peroxide			94-36-0	–	5	–	–	–	–	–
Benzyl chloride			100 -44-7	1	5	–	–	–	–	–
Beryllium                   an d beryllium com poun ds (a s Be)			7440 -41-7	See ta ble G-2
Biphenyl; Dip h en yl		see
Bismuth            t		ellur ide,	1304 -82-1	–	5	–	–	–	–	–
Und oped
Respi ra ble dust				–	15	–	–	–	–	–
Tota l dust
Bismuth  t ellur ide, Se- doped				–	5	–	–	–	–	–
Borat es,                Tetra ,			1330 -43-4	–	10	–	–	–	–	–
Sodium Salts
Anh ydrou s			1303 -96-4	–	10	–	–	–	–	–
Decah ydrat e			12179 -04-3	–	10	–	–	–	–	–
Pentah ydrat e
Boron dust	oxide,	Tota l	1303 -86-2	–	10	–	–	–	–	–
Bor on tr ibromide			10294 -33-4	–	–	–	–	1	10	–
Bor on tr ifluoride			7637 -07-2	–	–	–	–	1	3	–
Broma cil			314 -40-9	1	10	–	–	–	–	–
Brom in e			7726 -95-6	0.1	0.7	0.3	2	–	–	–
Brom in e penta fluoride			7789 -30-2	0.1	0.7	–	–	–	–	–
Br om oform			75-25-2	0.5	5	–	–	–	–	–
1,3-Buta diene; see   R   325 .50091   et seq.F			106 -99-0	1	2.2	5	11.1	–	–	–
Butan e			106 -97-8	800	1900	–	–	–	–	–
Butan eth iol; see But yl mercaptan
2-Butan on e      (Meth yl eth yl k et on e)			78-93-3	200	590	300	885	–	–	–
2-But oxyethan ol			111 -76-2	25	120	–	–	–	–	x
n-But yl acetat e			123 -86-4	150	710	200	950	–	–	–
se c-But yl acetat e			105 -46-4	200	950	–	–	–	–	–
tert -But yl acetat e			540 -88-5	200	950	–	–	–	–	–
But yl acrylat e			141 -32-2	10	55	–	–	–	–	–
n–But yl   a lcohol   (n- butan ol)			71-36-3	–	–	–	–	50	150	x
sec-But yl a lcohol (sec- butan ol)			78-92-2	100	305	–	–	–	–	–
t ert -But yl            a lcohol (tert -butan ol)			75-65-0	100	300	150	450	–	–	–
But ylam ine			109 -73-9	–	–	–	–	5	15	x
tert -But yl       chr omat e (a s Cr O3)			1189 -85-1	–	–	–	–	–	0.1	x
n-But yl glycidyl eth er (BGE )			2426 -08-6	25	135	–	–	–	–	–
n-But yl lactat e			138 -22-7	5	25	–	–	–	–	–
But yl mercaptan			109 -79-5	0.5	1.5	–	–	–	–	–
o-s ec-But ylphenol			89-72-5	5	30	–	–	–	–	x
p-tert -But yltoluene			98-51-1	10	60	20	120	–	–	–
Cadmium ;       see       R 325 .51851 et seq.F			7440 -43-9	–	0.005	–	–	–	–	–
Calcium car bonat e,			1317 -65-3

 

 

Respi ra ble dust		–	5	–	–	–	–	–
Tota l dust		–	15	–	–	–	–	–
Calcium cyanam ide	156 -62-7	–	0.5	–	–	–	–	–
Calcium hydroxide	1305 -62-0	–	5	–	–	–	–	–
Calcium oxide	1305 -78-8	–	5	–	–	–	–	–
Calcium silicat e,	1344 -95-2	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	15	–	–	–	–	–
Calcium sulfat e,	7778 -18-9	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	15	–	–	–	–	–
Cam phor, synth etic	76-22-2	–	2	–	–	–	–	–
Caprolactam ,	105 -60-2	– 5	1 20	– 10	3 40	– –	– –	– –
Dust Vapor
Capta fol (Difolatan R)	2425 -06-1	–	0.1	–	–	–	–	–
Captan	133 -06-2	–	5	–	–	–	–	–
Car bar yl (Sevin R)	63-25-2	–	5	–	–	–	–	–
Car bofuran (Fura dan R)	1563 -66-2	–	0.1	–	–	–	–	–
Car bon black	1333 -86-4	–	3.5	–	–	–	–	–
Car bon dioxide	124 -38-9	10,00	18,000	30,0	54,00	–	–	–
		0		00	0
Car bon disulfide	75-15-0	4	12	12	36	–	–	x
Car bon monoxide	630 -08-0	35	40	–	–	200	229	–
Car bon tetra bromide	558 -13-4	0.1	1.4	0.3	4	–	–	–
Car bon tetra chloride (Tetra chloromethan e)	56-23-5	2	12.6	–	–	–	–	x
Car bonyl fluoride	353 -50-4	2	5	5	15	–	–	–
Cat ech ol (Pyrocat echol)	120 -80-9	5	20	–	–	–	–	x
Cellulose,	9004 -34-6	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	15	–	–	–	–	–
Cesi um hydroxide	21351 -79-1	–	2	–	–	–	–	–
Chlordan e	57-74-9	–	0.5	–	–	–	–	x
Chlorinat ed cam ph en e (Toxa phon e)	8001 -35-2	–	0.5	–	1	–	–	x
Chlorinat ed   diphenyl oxide	55720 -99-5 or 31242 -93-0	–	0.5	–	–	–	–	–
Chlorine	7782 -50-5	0.5	1.5	1	3	–	–	–
Chlorine dioxide	10049 -04-4	0.1	0.3	0.3	0.9	–	–	–
Chlorine tr ifluoride	7790 -91-2	–	–	–	–	0.1	0.4	–
Chloroaceta ldehyde	107 -20-0	–	–	–	–	1	3	–
2- Ch lor oa cet oph en on e (Ph ena cyl chloride)	532 -27-4	0.5	0.3	–	–	–	–	–
Chloroacetyl chloride	79-04-9	0.5	0.2	–	–	–	–	–
Ch lor oben zen e	108 -90-7	75	350	–	–	–	–	–
o-Chlorobenzylidene ma lononitr ile	2698 -41-1	–	–	–	–	0.05	0.4	x
Ch lor obr om om ethan e	74-97-5	200	1050	–	–	–	–	–
2-Chloro-1,3- buta diene; see 「C-h lor opr en e
Chlorodifluoromethan e	75-45-6	1000	3500	–	–	–	–	–

 

 

Chlorodiphenyl Chlorine) (PCB)	(42%	53469 -21-9	–	1	–	–	–	–	x
Chlorodiphenyl Chlorine) (PCB)	(54%	11097 -69-1	–	0.5	–	–	–	–	x
1-Chloro-2,3-epoxy pr opan e; see Epichlorohydrin
2-Chloroethan ol; see                  Eth ylen e chlorohydrin
Ch lor oeth ylen e; see Vinyl chloride
Ch lor oform (Trichloromethan e)		67-66-3	2	9.78	–	–	–	–	–
bis(Ch lorom eth yl)eth e r ; see O.H. Rule 2301 (4)F		542 -88-1
Chlorom eth yl  m eth yl eth er ; see O.H. ru le 2301 (8)		107 -30-2
1-Ch loro-1- nitr opropan e		600 -25-9	4	10	–	–	–	–	–
Chloropenta fluoroeth an e		76-15-3	1000	6320	–	–	–	–	–
Chloropicrin		76-06-2	0.1	0.7	–	–	–	–	–
beta -Ch lor opr en e		126 -99-8	10	35	–	–	–	–	x
o-Ch lorost yr en e		2039 -87-4	50	285	75	428	–	–	–
o-Ch lorotolu en e		95-49-8	50	250	–	–	–	–	–
2-Chloro-6		1929 -82-4	–	5	–	–	–	–	–
-(tr ichlorometh yl)
pyridine,
Respi ra ble dust			–	15	–	–	–	–	–
Tota l dust
Chlor pyrifos		2921 -88-2	–	0.2	–	–	–	–	x
Chr omic        acid chr omat es (a s Cr O3)	an d	Var ies       with com poun d	–	–	–	–	–	0.1	–
Chr omium compoun ds (as C	(II) r )	7440 -47-3	–	0.5	–	–	–	–	–
Chr omium                (III ) compoun ds (as Cr)		7440 -47-3	–	0.5	–	–	–	–	–
Chr omium   meta l  (as Cr)		7440 -47-3	–	1	–	–	–	–	–
Chr yse n e; see    Coal    tar       pitch volat ile
Clopidol		2971 -90-6	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust			–	15	–	–	–	–	–
Coal  dust  (less  than 5% SiO 2) Respi ra ble quart z dust		–	–	2	–	–	–	–	–
Coal      dust    (great er than or equa l to 5% SiO 2), Respi ra ble dust		–	–	0.1	–	–	–	–	–
Coal tar pitch volat ile

 

 

(a s ben zen e solubles ) anthra cene,       BaP , ph enanthr en e, acridine,            cr yse n e, pyr en e	65996 -93-2	–	0.2	–	–	–	–	–
Cobalt      meta l,    dust, an d fum e (a s Co)	7440 -48-4	–	0.05	–	–	–	–	–
Cobalt    car bonyl   (as Co)	10210 -68-1	–	0.1	–	–	–	–	–
Cobalt   h ydrocar bon yl (a s Co)	16842 -03-8	–	0.1	–	–	–	–	–
Coke oven em iss ion s;	–		0.15
see   R   325 .50101   et			(150
seq.F			ug/m 3)
Coppe r ,	7440 -50-8	–	1	–	–	–	–	–
Dusts  an d  mists  (as
Cu )		–	0.1	–	–	–	–	–
Fum e (a s Cu)
Cott on dust (ra w)	–		1	–	–	–	–	–
Cra g                herbicide	136 -78-7	–	10	–	–	–	–	–
(Ses on e)
Tota l dust		–	5	–	–	–	–	–
Respi ra ble fra ct ion
Cresol, all isomers	1319 -77-3	5	22	–	–	–	–	x
Crotona ldehyde	123 -73-9 4170 -30-3	2	6	–	–	–	–	–
Cru fomat e	299 -86-5	–	5	–	–	–	–	–
Cum en e	98-82-8	50	245	–	–	–	–	x
Cyanam ide	420 -04-2	–	2	–	–	–	–	–
Cyan ides (as CN)	Var ies       with com poun d	–	5	–	–	–	–	x
Cyan ogen	460 -19-5	10	20	–	–	–	–	–
Cyan ogen chloride	506 -77-4	–	–	–	–	0.3	0.6	–
Cycloh exan e	110 -82-7	300	1050	–	–	–	–	–
Cycloh exan ol	108 -93-0	50	200	–	–	–	–	x
Cycloh exan on e	108 -94-1	25	100	–	–	–	–	x
Cycloh exen e	110 -83-8	300	1015	–	–	–	–	–
Cyclohexylam ine	108 -91-8	10	40	–	–	–	–	–
Cyclonite	121 -82-4	–	1.5	–	–	–	–	x
Cyclopenta diene	542 -92-7	75	200	–	–	–	–	–
Cyclopentan e	287 -92-3	600	1720	–	–	–	–	–
Cyhexat in	13121 -70-5	–	5	–	–	–	–	–
2,4-D (Dichlorophenoxyaceti c acid)	94-75-7	–	10	–	–	–	–	–
Deca boran e	17702 -41-9	0.05	0.3	0.15	0.9	–	–	x
Dem et on (SystoxR)	8065 -48-3	–	0.1	–	–	–	–	x
Dia ceton e a lcohol (4-Hydroxy-4-meth yl- 2-pentan on e)	123 -42-2	50	240	–	–	–	–	–
1,2-Diam inoethan e; see Eth ylenediam ine
Diazinon	333 -41-5	–	0.1	–	–	–	–	x
Diazomethan e	334 -88-3	0.2	0.4	–	–	–	–	–
Diboran e	19287 -45-7	0.1	0.1	–	–	–	–	–
2-N- Dibut ylam inoethan ol	102 -81-8	2	14	–	–	–	–	–

 

 

Dibut yl phosphat e	107 -66-4	1	5	2	10	–	–	–
Dibut yl phtha lat e	84-74-2	–	5	–	–	–	–	–
Dichloroacetylene	7572 -29-4	–	–	–	–	0.1	0.4	–
o-Dich loroben zen e	95-50-1	–	–	–	–	50	300	–
p-Dich loroben zen e	106 -46-7	75	450	110	675	–	–	–
3,3'- Dichlorobenzidine; see O.H. ru le 2301 (5)F	91-94-1
Dichlorodifluorometh an e	75-71-8	1000	4950	–	–	–	–	–
1,3-Dichloro-5,5- dimeth yl hydant oin	118 -52-5	–	0.2	–	0.4	–	–	–
Dichlorodiphenyltr i- chloroethan e   (DDT )	50-29-3	–	1	–	–	–	–	x
1,1-Dichloroethan e	75-34-3	100	400	–	–	–	–	–
1,2-Dichloroeth ylene	540 -59-0	200	790	–	–	–	–	–
Dichloroeth yl eth er	111 -44-4	5	30	10	60	–	–	x
Dich lorofluorom ethan e	75-43-4	10	40	–	–	–	–	–
Dich lor om ethan e; see                Meth ylene chloride
1,1-Dichloro-1- nitr oethan e	594 -72-9	2	10	–	–	–	–	–
1,2-Dichloropropan e; see                 Pr opylen e dichloride
1,3-Dichloropropene	542 -75-6	1	5	–	–	–	–	x
2,2-Dichloropropionic acid	75-99-0	1	6	–	–	–	–	–
Dich lorot etra fluoroet han e	76-14-2	1000	7000	–	–	–	–	–
Dichlorvos (DDVP)	62-73-7	–	1	–	–	–	–	x
Dicr ot oph os	141 -66-2	–	0.25	–	–	–	–	x
Dicyclopenta diene	77-73-6	5	30	–	–	–	–	–
Dicyclopenta dienyl	102 -54-5	–	5	–	–	–	–	–
iron,
Respi ra ble dust		–	10	–	–	–	–	–
Tota l dust
Dield rin	60-57-1	–	0.25	–	–	–	–	x
Diethan olam ine	111 -42-2	3	15	–	–	–	–	–
Dieth ylam ine	109 -89-7	10	30	25	75	–	–	–
2- Dieth ylam inoethan ol	100 -37-8	10	50	–	–	–	–	x
Dieth ylene tr iam ine	111 -40-0	1	4	–	–	–	–	x
Dieth yl     eth er;    see Eth yl eth er
Dieth yl ket on e	96-22-0	200	705	–	–	–	–	–
Dieth yl phtha lat e	84-66-2	–	5	–	–	–	–	–
Difluorodibromometh an e	75-61-6	100	860	–	–	–	–	–
Diglycidyl               eth er (DGE )	2238 -07-5	0.1	0.5	–	–	–	–	–
Dih ydr oxybe n zen e; see Hydroquinone
Diisobut yl ket on e	108 -83-8	25	150	–	–	–	–	–
Diisopropylam ine	108 -18-9	5	20	–	–	–	–	x
4-	60-11-7

 

 

Dimeth ylam inoazoben zen e; see O.H. ru le 2301 (6)F
Dim eth oxym ethan e; see Meth ylal
Dimeth yl acetam ide	127 -19-5	10	35	–	–	–	–	x
Dimeth ylam ine	124 -40-3	10	18	–	–	–	–	–
Dimeth ylam inobenze n e; see Xylidine
Dimeth ylan iline (N,N-Dimeth ylan iline)	121 -69-7	5	25	10	50	–	–	x
Dim eth ylbe nzen e; see Xylen e
Dimeth yl-1,2- dibromo-2,2- dichloroeth yl phosphat e	300 -76-5	–	3	–	–	–	–	x
Dimeth ylformam ide	68-12-2	10	30	–	–	–	–	x
2,6-Dimeth yl-4- h ep tan on e; see Diisobut yl ket on e
1,1- Dimeth ylhydra zine	57-14-7	0.5	1	–	–	–	–	x
Dimeth ylphtha lat e	131 -11-3	–	5	–	–	–	–	–
Dimeth yl sulfat e	77-78-1	0.1	0.5	–	–	–	–	x
Dinitolmide (3,5-Dinitr o-o- toluam ide)	148 -01-6	–	5	–	–	–	–	–
Dinitr obenzene     (a ll isomers) (m eta -) (orth o) (para -)	99-65-0 528 -29-0 100 -25-4	-	1	-	-	-	-	x
Din itr o-o-cr esol	534 -52-1	–	0.2	–	–	–	–	x
Dinitr otoluene	25321 -14-6	–	1.5	–	–	–	–	x
Dioxan e   (Dieth ylene dioxide)	123 -91-1	25	90	–	–	–	–	x
Dioxath ion (Delna v)	78-34-2	–	0.2	–	–	–	–	x
Diphenyl (Biphenyl)	92-52-4	0.2	1	–	–	–	–	–
Diphenylam ine	122 -39-4	–	10	–	–	–	–	–
Dip henylmethan e diisocyanat e; see                Meth ylene bisp henyl isocyanat e
Dip ropylene       glycol meth yl eth er	34590 -94-8	100	600	150	900	–	–	x
Dipropyl ket on e	123 -19-3	50	235	–	–	–	–	–
Diquat	2768 -72-9	–	0.5	–	–	–	–	–
Di-se c-oct yl phtha lat e [Di(2- eth ylhexyl)phtha lat e]	117 -81-7	–	5	–	10	–	–	–
Disulfiram	97-77-8	–	2	–	–	–	–	–
Dis ulfoton	298 -04-4	–	0.1	–	–	–	–	x
2,6-Di-tert -but yl-p- cr es ol (But ylat ed h ydroxytolu en e)	128 -37-0	–	10	–	–	–	–	–

 

 

Diur on		330 -54-1	–	10	–	–	–	–	–
Divinyl benzene		1321 -74-0	10	50	–	–	–	–	–
Em ery,		1302 -74-5	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust			–	10	–	–	–	–	–
En dosulfan		115 -29-7	–	0.1	–	–	–	–	x
En drin		72-20-8	–	0.1	–	–	–	–	x
Epichlorohydrin		106 -89-8	2	8	–	–	–	–	x
EPN		2104 -64-5	–	0.5	–	–	–	–	x
1,2-Epoxypropan e; see Pr opylene oxide
2,3-Epoxy-1-propan ol; see Glycidol
Ethan eth iol; see Eth yl mercaptan
Ethan olam ine		141 -43-5	3	8	6	15	–	–	–
Eth ion		563 -12-2	–	0.4	–	–	–	–	x
2-Eth oxyethan ol (E GEE )		110 -80-5	200	740	–	–	–	–	x
2-Eth oxyeth yl acetat e (Cellosolve acetat e)		111 -15-9	100	540	–	–	–	–	x
Eth yl acetat e		141 -78-6	400	1400	–	–	–	–	–
Eth yl acrylat e		140 -88-5	5	20	25	100	–	–	x
Eth yl                   a lcohol (Ethan ol)		64-17-5	1000	1900	–	–	–	–	–
Eth ylam ine		75-04-7	10	18	–	–	–	–	–
Eth yl am yl ket on e (5-Meth yl-3- h ep tan on e)		541 -85-5	25	130	–	–	–	–	–
Eth yl benzene		100 -41-4	100	435	125	545	–	–	–
Eth yl bromide		74-96-4	200	890	250	1100	–	–	–
Eth yl but yl ket on e (3- H eptan on e)		106 -35-4	50	230	–	–	–	–	–
Eth yl chloride		75-00-3	1000	2600	–	–	–	–	–
Eth yl eth er		60-29-7	400	1200	–	500	1500	–	–
Eth yl format e		109 -94-4	100	300	–	–	–	–	–
Eth yl mercaptan		75-08-1	0.5	1	–	–	–	–	–
Eth yl silicat e		78-10-4	10	85	–	–	–	–	–
Eth ylene chlorohydrin		107 -07-3	–	–	–	–	1	3	x
Eth ylenediam ine		107 -15-3	10	25	–	–	–	–	–
Eth ylene dibromide		106 -93-4	See ta ble G-2
Eth ylene dichloride		107 -06-2	1	4	2	8	–	–	–
Eth ylene glycol		107 -21-1	–	–	–	–	50	125	–
Eth ylene           glycol dinitrat e (EGDN)		628 -96-6	–	–	–	0.1	–	–	x
Eth ylene           glycol meth yl acetat e (EGME); see Meth yl  cellosolve acetat e
Eth yleneimine; see O.H. ru le 2301 (7)		151 -56-4
Eth ylen e oxide; see   R   325 .51151 seq.F	et	75-21-8	1	1.8	5	9.0	-	-	-
Eth ylidene chloride; see                           1,1- Dichloroethan e

 

 

Eth ylidene n or born en e		16219 -75-3	–	–	–	–	5	25	–
N-E thylmorpholine		100 -74-3	5	23	–	–	–	–	x
F enam iphos		22224 -92-6	–	0.1	–	–	–	–	x
Fensulfoth ion (Dasan it)		115 -90-2	–	0.1	–	–	–	–	–
Fenth ion		55-38-9	–	0.2	–	–	–	–	x
Ferbam , Dust		14484 -64-1	–	10	–	–	–	–	–
Ferr ovana dium dust		12604 -58-9	–	1	–	3	–	–	–
Fluorides (as F)		Var ies       with com poun d	–	2.5	–	–	–	–	–
Fluorine		7782 -41-4	0.1	0.2	–	–	–	–	–
Fluorotr ichlorometha n e (Trichlorofluorometha n e)		75-69-4	–	–	–	–	1000	5600	–
F on ofos		944 -22-9	–	0.1	–	–	–	–	x
Forma ldehyde; see   R   325 .51451   et seq.F		50-00-0	0.75	0.9	2	2.5
Formam ide		75-12-7	20	30	30	45	–	–	–
Form ic acid		64-18-6	5	9	–	–	–	–	–
Fur fura l		98-01-1	2	8	–	–	–	–	x
Fur fur yl a lcohol		98-00-0	10	40	15	60	–	–	x
Gasoline		8006 -61-9	300	900	500	1500	–	–	–
German ium tetrah ydride		7782 -65-2	0.2	0.6	–	–	–	–	–
Glutara ldehyde		111 -30-8	–	–	–	–	0.2	0.8	–
Glycerin,		56-81-5	–	5	–	–	–	–	–
Respi ra ble mist
tota l mist			–	10	–	–	–	–	–
Glycidol		556 -52-5	25	75	–	–	–	–	–
Glycol           m on oeth yl eth er ; see 2-Eth oxyethan ol
Gra in        dust wheat , bar ley)	(Oat ,	–	–	10	–	–	–	–	–
Gra phite, natura l Respi ra ble dust		7782 -42-5	–	2.5	–	–	–	–	–
Gra phite, synth etic,		–	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust			–	10	–	–	–	–	–
Guth ion R;                 see Azinphos meth yl
Gyps um ,		13397 -24-5	–	5	–	–	–	–	–
Respi ra ble dust
tota l dust			–	15	–	–	–	–	–
Ha fnium		7440 -58-6	–	0.5	–	–	–	–	–
Hepta chlor		76-44-8	–	0.5	–	–	–	–	x
Heptan e (n-Heptan e)		142 -82-5	400	1600	500	2000	–	–	–
Hexachlorobuta diene		87-68-3	–	0.02	0.24	–	–	–	–
Hexachlorocyclopenta diene		77-47-4	0.01	0.1	–	–	–	–	–
H exach loroethan e		67-72-1	1	10	–	–	–	–	x
Hexachlorona phtha le n e		1335 -87-1	–	0.2	–	–	–	–	x
H exa flu or oa cet on e		684 -16-2	0.1	0.7	–	–	–	–	x
n -H exan e		110 -54-3	50	180	–	–	–	–	–
Hexan e isomer s		Var ies       with	500	1800	1000	3600	–	–	–

 

 

	com poun d
2-H exan on e (Meth yl               n-but yl k et on e)	591 -78-6	5	20	–	–	–	–	–
H exon e              (Meth yl isobut yl k et on e)	108 -10-1	50	205	75	300	–	–	–
sec-Hexyl acetat e	108 -84-9	50	300	–	–	–	–	–
H exyle n e glycol	107 -41-5	–	–	–	–	25	125	–
Hydra zine	302 -01-2	0.1	0.1	–	–	–	–	x
H ydrogenat ed t erphenyls	61788 -32-7	0.5	5	–	–	–	–	–
Hydrogen bromide	10035 -10-6	–	–	–	–	3	10	–
Hydrogen chloride	7647 -01-0	–	–	–	–	5	7	–
Hydrogen cyan ide	74-90-8	–	–	4.7	5	–	–	x
Hydrogen fluoride (as F)	7664 -39-3	3	–	6	–	–	–	–
Hydrogen peroxide	7722 -84-1	1	1.4	–	–	–	–	–
Hydrogen selenide (as Se)	7783 -07-5	0.05	0.2	–	–	–	–	–
Hydrogen sulfide	7783 -06-4	10	14	15	21	–	–	–
Hydroquinone	123 -31-9	–	2	–	–	–	–	–
2-Hydroxypropyl acrylat e	999 -61-1	0.5	3	–	–	–	–	x
Indene	95-13-6	10	45	–	–	–	–	–
Indium                an d compoun ds (as In)	7440 -74-6	–	0.1	–	–	–	–	–
Iodine	7553 -56-2	–	–	–	–	0.1	1	–
Iodoform	75-47-8	0.6	10	–	–	–	–	–
Iron oxide fum e	1309 -37-1	–	10	–	–	–	–	–
Iron penta car bonyl (as F e)	13463 -40-6	0.1	0.8	0.2	1.6	–	–	–
Iron salts (soluble) (as F e)	Var ies       with com poun d	–	1	–	–	–	–	–
Isoam yl acetat e	123 -92-2	100	525	–	–	–	–	–
Isoam yl a lcohol (primar y                  an d secon dar y)	123 -51-3	100	360	125	450	–	–	–
Isobut yl acetat e	110 -19-0	150	700	–	–	–	–	–
Isobut yl a lcohol	78-83-1	50	150	–	–	–	–	–
Isooctyl a lcohol	26952 -21-6	50	270	–	–	–	–	x
Is ophoron e	78-59-1	4	23	–	–	–	–	–
Is ophoron e diisocyanat e	4098 -71-9	0.005	–	0.02	–	–	–	x
2-Isopropoxyethan ol	109 -59-1	25	105	–	–	–	–	–
Isopropyl acetat e	108 -21-4	250	950	310	1185	–	–	–
Isopropyl a lcohol	67-63-0	400	980	500	1225	–	–	–
Isopropylam ine	75-31-0	5	12	10	24	–	–	–
N-Isopropylan iline	768 -52-5	2	10	–	–	–	–	x
Isopropyl eth er	108 -20-3	500	2100	–	–	–	–	–
Isopropyl             glycidyl eth er (IGE )	4016 -14-2	50	240	75	360	–	–	–
Kaolin,	–	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
Ket en e	463 -51-4	0.5	0.9	1.5	3	–	–	–
Lead    inorgan ic     (as Pb); see   R   325 .51901   et	7439 -92-1	–	0.05 (50 ug/m 3)	–	–	–	–	–

 

 

seq.F
Limestone,    (calcium	1317 -65-3	–	5	–	–	–	–	–
car bonat e)
Respi ra ble dust		–	15	–	–	–	–	–
Tota l dust
Lindan e	58-89-9	–	0.5	–	–	–	–	x
Lith ium hydride	7580 -67-8	–	0.025	–	–	–	–	–
L.P.G. (Liquified        petr oleum gas)	68476 -85-7	1000	1800	–	–	–	–	–
Magnesi t e,	546 -93-0	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	15	–	–	–	–	–
Magnesium        oxide fum e, Tota l part iculat e	1309 -48-4	–	10	–	–	–	–	–
Malath ion dust	121 -75-5	–	10	–	–	–	–	x
Maleic anh ydride	108 -31-6	1	–	–	–	–	–	–
Man gan ese ,	7439 -96-5	- -	- 1	- -	- 3	- -	5 -	- -
Compoun ds (as Mn) Fum e (as Mn)
Man gan ese cyclopenta dienyl tr icar bonyl (as Mn)	12079 -65-1	–	0.1	–	–	–	–	x
Man gan ese   tetr oxide (as Mn)	1317 -35-7	–	1	–	–	–	–	–
Mar ble,             (ca lcium	1317 -65-3	–	5	–	–	–	–	–
car bonat e)
Respi ra ble dust		–	15	–	–	–	–	–
Tota l dust
Mercur y	7439 -97-6	-	-	-	-	-	0.1	x
Inorgan ic     an d     ar yl
compoun ds
(As Hg)		-	0.01	-	0.03	-	-	x
Organ ic      compoun ds		-	0.05	-	-	-	-	x
(as Hg)
Vapor (as Hg)
Mesi tyl oxide	141 -79-7	15	60	25	100	–	–	–
Metha crylic acid	79-41-4	20	70	–	–	–	–	x
Methan eth iol; see Meth yl mercaptan
Meth omyl (Lannat e)	16752 -77-5	–	2.5	–	–	–	–	–
Meth oxychlor dust	72-43-5	–	10	–	–	–	–	–
2-Meth oxyethan ol; see Meth yl cellosolve
4-Meth oxyph en ol	150 -76-5	–	5	–	–	–	–	–
Meth yl acetat e	79-20-9	200	610	250	760	–	–	–
Meth yl            acetylene (Pr opyn e)	74-99-7	1000	1650	–	–	–	–	–
Meth yl           acetylene- propadiene mixtur e (MAPP )	–	1000	1800	1250	2250	–	–	–
Meth yl acrylat e	96-33-3	10	35	–	–	–	–	x
Meth ylacrylonitr ile	126 -98-7	1	3	–	–	–	–	x
Meth ylal (Dim eth oxym ethan e)	109 -87-5	1000	3100	–	–	–	–	–
Meth yl a lcohol	67-56-1	200	260	250	325	–	–	x
Meth ylam ine	74-89-5	10	12	–	–	–	–	–

 

 

Meth yl am yl alcoh ol; see   Meth yl    isobut yl car binol
Meth yl n-am yl ket on e	110 -43-0	100	465	–	–	–	–	–
Meth yl bromide	74-83-9	5	20	–	–	–	–	x
Meth yl                n-but yl k et on e; see 2-H exan on e
Meth yl cellosolve (2-Meth oxyethan ol)	109 -86-4	25	80	–	–	–	–	x
Meth yl            cellosolve acetat e (2-Meth oxyeth yl acetat e)	110 -49-6	25	120	–	–	–	–	x
Meth yl chloride	74-87-3	50	105	100	210	–	–	–
Meth yl chloroform (1,1,1- Trichloroethan e)	71-55-6	350	1900	450	2450	–	–	–
Meth yl                         2- cyan oacrylat e	137 -05-3	2	8	4	16	–	–	–
Meth ylcyclohexan e	108 -87-2	400	1600	–	–	–	–	–
Meth ylcyclohexan ol	25639 -42-3	50	235	–	–	–	–	–
o- Meth ylcyclohexan one	583 -60-8	50	230	75	345	–	–	x
Meth ylcyclopenta dien yl man gan ese tr icar bonyl (as Mn)	12108 -13-3	–	0.2	–	–	–	–	x
Meth yl dem et on	8022 -00-2	–	0.5	–	–	–	–	x
4,4'-Meth ylene bis (2-chloroan iline) (MBOC A)	101 -14-4	0.02	0.22	–	–	–	–	x
Meth ylene bis (4- cyclohexylis ocyanat e)	5124 -30-1	–	–	–	–	0.01	0.11	–
Meth ylene bisp henyl isocyanat e (MDI )	101 -68-8	–	–	–	–	0.02	0.2	–
Meth ylene chloride see   R   325 .51651   et seq.F	75-09-2	25	87	125	434
Meth ylenedian iline (MDA); see   R   325 .50051   et seq.F	101 -77-9	10 ppb **	0.08 mg/m 3	100 ppb* *	0.8 mg/m 3	-	-	-
Meth yl  eth yl   ket on e (MEK); see 2-Butan on e
Meth yl  eth yl   ket on e peroxide (MEKP)	1338 -23-4	–	–	–	–	0.7	5	–
Meth yl format e	107 -31-3	100	250	150	375	–	–	–
Meth yl hydra zine	60-34-4	–	–	–	–	0.2	0.35	x
Meth yl iodide	74-88-4	2	10	–	–	–	–	x
Meth yl               isoam yl ket on e	110 -12-3	50	240	–	–	–	–	–
Meth yl               isobut yl car binol	108 -11-2	25	100	40	165	–	–	x
Meth yl               isobut yl k et on e;

 

 

see H exon e
Meth yl (MIC )	isocyanat e		624 -83-9	0.02	0.05	–	–	–	–	x
Meth yl ket on e	isopropyl		563 -80-4	200	705	–	–	–	–	–
Meth yl mercaptan			74-93-1	0.5	1	–	–	–	–	–
Meth yl metha crylat e			80-62-6	100	410	–	–	–	–
Meth yl parath ion			298 -00-0	–	0.2	–	–	–	–	x
Meth yl propyl k et on e; see 2-P entan on e
Meth yl silicat e			681 -84-5	1	6	–	–	5	30	–
alpha -Meth yl styrene			98-83-9	50	240	100	485	–	–	–
Metr ibuzin			21087 -64-9	–	5	–	–	–	–	–
Mica; see Silicat es
Molybdemun , (as Mo)			7439 -98-7	–	10	–	–	–	–	–
Insoluble compoun ds
Soluble compoun ds				–	5	–	–	–	–	–
Mon ocr ot oph os (Azodrin R)			6923 -22-4	–	0.25	–	–	–	–	–
Monometh yl an iline			100 -61-8	0.5	2	–	–	–	–	x
Morpholine			110 -91-8	20	70	30	105	–	–	x
Naphtha  (Coal tar )			8030 -30-6	100	400	–	–	–	–	–
Naphtha lene			91-20-3	10	50	15	75	–	–	–
alpha -Naphth ylam ine; see          O.H.          ru le 2301 (10)F			134 -32-7
beta -Naphth ylam ine; see          O.H.          ru le 2301 (11)F			91-59-8
Nickel    c Ni)	ar bonyl	(as	13463 -39-3	0.001	0.007	–	–	–	–	–
Nickel,			7440 -02-0	-	1	-	-	-	-	-
Meta l   an d   insoluble
compoun ds
(as Mi)				-	0.1	-	-	-	-	-
Soluble         compoun ds
(as ni)
Nicotine			54-11-5	–	0.5	–	–	–	–	x
Nitr ic acid			7697 -37-2	2	5	4	10	–	–	–
Nitr ic oxide			10102 -43-9	25	30	–	–	–	–	–
p-Nitr oan iline			100 -01-6	–	3	–	–	–	–	x
Nitr obenzene			98-95-3	1	5	–	–	–	–	x
p-Nitr ochlorobenzen e			100 -00-5	–	1	–	–	–	–	x
4-Nitr odiphenyl; see          O.H.          ru le 2301 (12)F			92-93-3
Nitr oethan e			79-24-3	100	310	–	–	–	–	–
Nitr ogen dioxide			10102 -44-0	–	–	1	1.8	–	–	–
Nitr ogen tr ifluoride			7783 -54-2	10	29	–	–	–	–	–
Nitr oglycerin			55-63-0	–	–	–	0.1	–	–	x
Nitr omethan e			75-52-5	100	250	–	–	–	–	–
1-Nitr opropan e			108 -03-2	25	90	–	–	–	–	–
2-Nitr opropan e			79-46-9	10	35	–	–	–	–	–
N- Nitr osodimeth ylam ine ; see          O.H.          ru le 2301 (13)F			62-75-9
Nitr otoluene

 

 

o-isom er m-isom er p-isomer	88-72-2 99-08-1 99-99-0	2	11	–	–	–	–	x
Nitr otr ichloromethan e ; see Chloropicrin
Nonan e	111 -84-2	200	1050	–	–	–	–	–
Octa chlorona phtha len e	2234 -13-1	–	0.1	–	0.3	–	–	x
Octan e	111 -65-9	300	1450	375	1800	–	–	–
Oil mist, minera l	8012 -95-1	–	5	–	–	–	–	–
Osmium  tetr oxide  (as Os)	20816 -12-0	–	0.002	–	0.006	–	–	–
Oxalic acid	144 -62-7	–	1	–	2	–	–	–
Oxyge n difluoride	7783 -41-7	–	–	–	–	0.05	0.1	–
Ozon e	10028 -15-6	0.1	0.2	0.3	0.6	–	–	–
Para ffin wax fum e	8002 -74-2	–	2	–	–	–	–	–
Para quat ,       respi ra ble dust	1910 -42-5 2074 -50-2 4685 -14-7	–	0.1	–	–	–	–	x
Parath ion	56-38-2	–	0.1	–	–	–	–	x
Part iculat es	–	–	5	–	–	–	–	–
not                 oth erwise
regulat ed,	–
Respi ra ble dust	–	–	15	–	–	–	–	–
Tota l dust
Penta boran e	19624 -22-7	0.005	0.01	0.01 5	0.03	–	–	–
Penta chlorona phtha le n e	1321 -64-8	–	0.5	–	–	–	–	x
P enta ch loroph enol	87-86-5	–	0.5	–	–	–	–	x
Penta erythr itol,	115 -77-5	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
Pentan e	109 -66-0	600	1800	750	2250	–	–	–
2-P entan on e (Meth yl                 propyl k et on e)	107 -87-9	200	700	250	875	–	–	–
P erch loroeth ylen e (Tetra chloroeth ylene)	127 -18-4	25	170	–	–	–	–	–
P erch lorom eth yl mercaptan	594 -42-3	0.1	0.8	–	–	–	–	–
Perchloryl fluoride	7616 -94-6	3	14	6	28	–	–	–
Per lit e	93763 -70-3	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	15	–	–	–	–	–
Petr oleum      distillat es (Naphtha ) (Rubbe r solvent )		400	1600	–	–	–	–	–
Ph en ol	108 -95-2	5	19	–	–	–	–	x
Ph enoth iazine	92-84-2	–	5	–	–	–	–	x
p-Ph enylenedi am ine	106 -50-3	–	0.1	–	–	–	–	x
Ph enyl eth er , vapor	101 -84-8	1	7	–	–	–	–	–
Ph enyl eth er-bip henyl mixtur e, vapor	–	1	7	–	–	–	–	–
Ph enyleth ylen e;      see St yr en e
Ph enyl  glycidyl  eth er (P GE)	122 -60-1	1	6	–	–	–	–	–

 

 

Ph enylhydra zine	100 -63-0	5	20	10	45	–	–	x
Ph enyl mercaptan	108 -98-5	0.5	2	–	–	–	–	–
Ph enylphosphine	638 -21-1	–	–	–	–	0.05	0.25	–
Ph orat e	298 -02-2	–	0.05	–	0.2	–	–	x
Ph osdrin (Mevin phosR)	7786 -34-7	–	0.1	–	0.3	–	–	x
Ph osgen e       (Car bon yl chloride)	75-44-5	0.1	0.4	–	–	–	–	–
Ph osphine	7803 -51-2	0.3	0.4	1	1	–	–	–
Ph osphoric acid	7664 -38-2	–	1	–	3	–	–	–
Ph osp horu s (yell ow)	7723 -14-0	–	0.1	–	–	–	–	–
Ph osp horu s oxychloride	10025 -87-3	0.1	0.6	–	–	–	–	–
Ph osp horu s penta chloride	10026 -13-8	–	1	–	–	–	–	–
Ph osp horu s penta sulfide	1314 -80-3	–	1	–	3	–	–	–
Ph osp horu s tr ichloride	7719 -12-2	0.2	1.5	0.5	3	–	–	–
Phtha lic anh ydride	85-44-9	1	6	–	–	–	–	–
m -Phtha lodinitr ile	626 -17-5	–	5	–	–	–	–	–
Picloram ,	1918 -02-1	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
Picric acid	88-89-1	–	0.1	–	–	–	–	x
Pipera zine dihydr och loride	142 -64-3	–	5	–	–	–	–	–
Pindone (2-Pivalyl-1,3- indan dione)	83-26-1	–	0.1	–	–	–	–	–
Plaster of Par is,	26499 -65-0	–	5	–	–	–	–	–
(Calcium sulfat e)
Respi ra ble dust
Tota l dust		–	15	–	–	–	–	–
Plat inum (as Pt )	7440 -06-4	–	1	–	–	–	–	–
Meta l
Soluble salts		–	0.002	–	–	–	–	–
Port lan d cement ,	65997 -15-1	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
Pota ssium hydroxide	1310 -58-3	–	–	–	–	–	2	–
Pr opan e	74-98-6	1000	1800	–	–	–	–	–
Pr opar gyl a lcohol	107 -19-7	1	2	–	–	–	–	x
beta -Pr opriolactone; see          O.H.          ru le 2301 (14)F	57-57-8
Pr opionic acid	79-09-4	10	30	–	–	–	–	–
Pr opoxur (Ba ygon)	114 -26-1	–	0.5	–	–	–	–	–
n -Pr opyl acetat e	109 -60-4	200	840	250	1050	–	–	–
n -Pr opyl a lcohol	71-23-8	200	500	250	625	–	–	–
n -Pr opyl nitrat e	627 -13-4	25	105	40	170	–	–	–
Pr opylene dichloride	78-87-5	75	350	110	510	–	–	–
Pr opylene         glycol dinitrat e	6423 -43-4	0.05	0.3	–	–	–	–	–
Pr opylene glycol m on om eth yl eth er	107 -98-2	100	360	150	540	–	–	–
Pr opylene imine	75-55-8	2	5	–	–	–	–	x
Pr opylene oxide	75-56-9	20	50	–	–	–	–	–
Pr opyne;  see   Meth yl

 

 

acetylene
Pyrethrum		8003 -34-7	–	5	–	–	–	–	–
Pyridine		110 -86-1	5	15	–	–	–	–	–
Qu in on e		106 -51-4	0.1	0.4	–	–	–	–	–
Res or cin ol		108 -46-3	10	45	20	90	–	–	–
Rhodium , Insoluble   compoun ds (as Rh ) Meta l fum e (as Rh ) Soluble         compoun ds (as Rh )		7440 -16-6	– – –	0.1 0.1 0.001	– – –	– – –	– – –	– – –	– – –
Ronn el		299 -84-3	–	10	–	–	–	–	–
Rosin       core       solder pyrolysis products,               as forma ldehyde		–	–	0.1	–	–	–	–	–
Rot en on e		83-79-4	–	5	–	–	–	–	–
Rou ge, Respi ra ble dust Tota l dust		–	– –	5 10	– –	– –	– –	– –	– –
Selenium   compoun ds (a s Se)		7782 -49-2	–	0.2	–	–	–	–	–
Selenium hexafluoride (a s Se)		7783 -79-1	0.05	0.4	–	–	–	–	–
Silica, am orphous, precipitat ed an d gel		112926 -00-8	–	6	–	–	–	–	–
Silica,         am orphous, diat oma ceous earth , conta ining  less than 1% crysta lline silica		61790 -53-2	–	6	–	–	–	–	–
Silica,            crysta lline cristobalite, Respi ra ble dust		14464 -46-1	–	0.05	–	–	–	–	–
Silica,            crysta lline quart z, Respi ra ble dust		14808 -60-7	–	0.1	–	–	–	–	–
Silica,            crysta lline tr idymite, Respi ra ble dust		15468 -32-3	–	0.05	–	–	–	–	–
Silica,            crysta lline tr ipoli, Respi ra ble dust		1317 -95-9	–	0.1	–	–	–	–	–
Silica, fused , Respi ra ble dust		60676 -86-0	–	0.1	–	–	–	–	–
Silicat es (less than 1% crysta lline silica)
	Mica, respi ra ble dust	12001 -26-2	–	3	–	–	–	–	–
	Soa ps t on e, tota l dust	–	–	6	–	–	–	–	–
	Soa ps t on e, respi ra ble dust	–	–	3	–	–	–	–	–
	Talc

 

 

	(conta ining asbes tos);   use asbes tos limit	–	R 325 .51311 et seq., Asbes tos for Genera l Industr y
	Talc (conta in ing  no asbes tos), respi ra ble dust	14807 -96-6	–	2	–	–	–	–	–
	Tremolite	R 325 .51311 et seq., Asbes tos for Genera l Industr y
Silicon , Respi ra ble dust Tota l dust		7440 -21-3	– –	5 10	– –	– –	– –	– –	– –
Silicon car bide , Respi ra ble dust Tota l dust		409 -21-2	– –	5 10	– –	– –	– –	– –	– –
Silicon tetrah ydride		7803 -62-5	5	7	–	–	–	–	–
Silver,        meta l      an d soluble compoun ds (as Ag)		7440 -22-4	–	0.01	–	–	–	–	–
Soa ps ton e;                 see Silicat es
Sodium azide (as HN 3) (as NaN 3)		26628 -22-8	– –	– –	– –	– –	0.1 –	– 0.3	x x
Sodium bisulfite		7631 -90-5	–	5	–	–	–	–	–
Sodium fluoroacetat e		62-74-8	–	0.05	–	0.15	–	–	x
Sodium hydroxide		1310 -73-2	–	–	–	–	–	2	–
Sodium meta bisulfite		7681 -57-4	–	5	–	–	–	–	–
Star ch, Respi ra ble dust Tota l dust		9005 -25-8	– –	5 15	– –	– –	– –	– –	– –
Stibine		7803 -52-3	0.1	0.5	–	–	–	–	–
Stoddar d solvent		8052 -41-3	100	525	–	–	–	–	–
Str ychn ine		57-24-9	–	0.15	–	–	–	–	–
St yr en e		100 -42-5	50	215	100	425	–	–	–
Subtilisins (Pr oteolytic enzymes)		9014 -01-1	–	–	–	0.000 06 (60 min.)	–	–	–
Su cr ose, Respi ra ble dust Tota l dust		57-50-1	– –	5 15	– –	– –	– –	– –	– –
Sulfur dioxide		7446 -09-5	2	5	5	10	–	–	–
Sulfur hexafluoride		2551 -62-4	1000	6000	–	–	–	–	–
Sulfur ic acid		7664 -93-9	–	1	–	–	–	–	–
Sulfur monochloride		10025 -67-9	–	–	–	–	1	6	–
Sulfur penta fluoride		5714 -22-7	–	–	–	–	0.01	0.1	–
Sulfur tetra fluoride		7783 -60-0	–	–	–	–	0.1	0.4	–
Sulfur yl fluoride		2699 -79-8	5	20	10	40	–	–	–
Su lpr ofos		35400 -43-2	–	1	–	–	–	–	–
SystoxR; see Dem et on
2,4,5-T                  (2,4,5- tr ichlorophenoxyaceti c acid)		93-76-5	–	10	–	–	–	–	–
Talc; see Silicat es
Tanta lum ,  meta l  an d oxide dust		7440 -25-7	–	5	–	–	–	–	–
TEDP (Sulfot ep)		3689 -24-5	–	0.2	–	–	–	–	x
Tellur ium                   an d compoun ds (as Te)		13494 -80-9	–	0.1	–	–	–	–	–

 

 

Tellur ium hexafluoride (as Te)	7783 -80-4	0.02	0.2	–	–	–	–	–
Temephos,	3383 -96-8	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
TEPP	107 -49-3	–	0.05	–	–	–	–	x
Terphenyls	26140 -60-3	–	–	–	–	0.5	5	–
1,1,1,2-Tetra chloro-2, 2-difluoro-ethan e	76-11-9	500	4170	–	–	–	–	–
1,1,2,2-Tetra chloro-1, 2-difluoro-ethan e	76-12-0	500	4170	–	–	–	–	–
1,1,2,2- Tetra chloroethan e	79-34-5	1	7	–	–	–	–	x
Tetra ch loroeth ylen e; see P erch loroeth ylen e
Tetra ch lorom ethan e; see Car bon tetra chloride
Tetra chlorona phtha le n e	1335 -88-2	–	2	–	–	–	–	x
Tetra eth yl lead (as Pb)	78-00-2	–	0.075	–	–	–	–	x
Tetrah ydrofuran	109 -99-9	200	590	250	735	–	–	–
Tetram eth yl  lead  (as Pb)	75-74-1	–	0.075	–	–	–	–	x
Tetram eth yl su ccin onitr ile	3333 -52-6	0.5	3	–	–	–	–	x
Tetran itr omethan e	509 -14-8	1	8	–	–	–	–	–
Tetra sodium pyrophosphat e	7722 -88-5	–	5	–	–	–	–	–
Tetr yl (2,4,6-Trinitr o- phenylmeth ylnitram in e)	479 -45-8	–	1.5	–	–	–	–	x
Tha llium ,            soluble compoun ds (as Tl)	7440 -28-0	–	0.1	–	–	–	–	x
4,4'-Thiobis	96-69-5	–	5	–	–	–	–	–
(6-tert -but yl-m-cresol)
Respi ra ble dust
Tota l dust		–	10	–	–	–	–	–
Thioglycolic acid	68-11-1	1	4	–	–	–	–	x
Thionyl chloride	7719 -09-7	–	–	–	–	1	5	–
Thiram	137 -26-8	–	5	–	–	–	–	–
Tin,	7440 -31-5   7440 -31-5 21651 -19-4	–   – –	2   0.1 2	–   – –	–   – –	–   – –	–   – –	–   x –
Inorgan ic compoun ds (except oxides ) (as Sn ) Organ ic compoun ds (as Sn )
Oxides (as Sn )
Titan ium dioxide Tota l dust	13463 -67-7	–	10	–	–	–	–	–
Tolu en e	108 -88-3	100	375	150	560	–	–	–
Toluene-2,4- diisocyanat e (TDI )	584 -84-9	0.005	0.04	0.02	0.15	–	–	–
m -Toluidine	108 -44-1	2	9	–	–	–	–	x
0-Toluidine	95-53-4	5	22	–	–	–	–	x
p-Toluidine	106 -49-0	2	9	–	–	–	–	x
Toxa ph en e; see             Chlorinat ed

 

 

cam ph en e
Tremolite;            see Silicat es
Tribut yl phosphat e	126 -73-8	0.2	2.5	–	–	–	–	–
Trichloroacetic acid	76-03-9	1	7	–	–	–	–	–
1,2,4- Trichlorobenzene	120 -82-1	–	–	–	–	5	40	–
1,1,1-Trichloroethan e; see Meth yl chloroform
1,1,2-Trichloroethan e	79-00-5	10	45	–	–	–	–	x
Trichloroeth ylene	79-01-6	50	270	200	1080	–	–	–
Trichloromethan e; see Ch lor oform
Trichlorona phtha lene	1321 -65-9	–	5	–	–	–	–	x
1,2,3- Trichloropropan e	96-18-4	10	60	–	–	–	–	–
1,1,2-Trichloro-1,2, 2-tr ifluoroethan e	76-13-1	1000	7600	1250	9500	–	–	–
Trieth ylam ine	121 -44-8	10	40	15	60	–	–	–
Trifluorobromometha n e	75-63-8	1000	6100	–	–	–	–	–
Trimellitic anh ydride	552 -30-7	0.005	0.04	–	–	–	–	–
Trimeth ylam ine	75-50-3	10	24	15	36	–	–	–
Trimeth yl benzene	25551 -13-7	25	125	–	–	–	–	–
Trimeth yl phosphite	121 -45-9	2	10	–	–	–	–	–
2,4,6-Trinitr ophenol; see Picric acid
2,4,6- Trinitr ophenylmeth yl nitram ine; see Tetr yl
2,4,6-Trinitr otoluene (TNT)	118 -96-7	–	0.5	–	–	–	–	x
Triorth ocresyl phosphat e	78-30-8	–	0.1	–	–	–	–	x
Triphenyl am ine	603 -34-9	–	5	–	–	–	–	–
Triphenyl phosphat e	115 -86-6	–	3	–	–	–	–	–
Tun gsten	7440 -33-7	–	5	–	10	–	–	–
Insoluble   compoun ds
(a s W)		–	1	–	3	–
Soluble         compoun ds
(a s W)
Tur pent ine	8006 -64-2	100	560	–	–	–	–	–
Uran ium (as U)	7440 -61-1	–	0.2	–	0.6	–	–	–
Insoluble compoun ds
Soluble compoun ds		–	0.05	–	-	–	–	–
n -Valera ldehyde	110 -62-3	50	175	–	–	–	–	–
Vana dium pent oxide	1314 -62-1	–	0.05	–	–	–	–	–
Fum e (as v2o5)
Respi ra ble      dust    (as		–	0.05	–	–	–	–	–
v2o5)
Vegeta ble oil mists	–	–	5	–	–	–	–	–
Respi ra ble mist
Tota l mist		–	15	–	–	–	–	–
Vinyl acetat e	108 -05-4	10	30	20	60	–	–	–
Vinyl      benzene;    see St yr en e
Vinyl bromide	593 -60-2	5	20	–	–	–	–	–

 

 

Vinyl chloride see 325 .51401 et seq.F		75-01-4	1	2.5	5	12.8
Vinyl       cyan ide;       see Acr ylonitr ile
Vinyl dioxide	cycloh exen e	106 -87-6	10	60	–	–	–	–	x
Vinylidene chloride (1,1-Dichloroeth ylene)		75-35-4	1	4	–	–	–	–	–
Vinyl toluene		25013 -15-4	100	480	–	–	–	–	–
VM & P Naphtha		8032 -32-4	300	1350	400	1800	–	–	–
War far in		81-81-2	–	0.1	–	–	–	–	–
Weldin g fum es (Tota l part iculat e)*		–	–	5	–	–	–	–	–
Wood dust, All     soft      an d     har d woods (excep t   West ern   r ed cedar )		–	–	5	–	10	–	–	–
Wood   dust,  Western red cedar		–	–	2.5	–	–	–	–	–
Xylenes             (o-,m-,p- isomers) (Dim eth yl benzen e)		1330 -20-7	100	435	150	655	–	–	–
m -Xylene              alpha , alpha ’-diam ine		1477 -55-0	–	–	–	–	–	0.1	x
Xylidine		1300 -73-8	2	10	–	–	–	–	x
Yttr ium		7440 -65-5	–	1	–	–	–	–	–
Zinc chloride fum e		7646 -85-7	–	1	–	2	–	–	–
Zinc      chr omat e       (as Cr O3)		Var ies       with com poun d	–	–	–	–	–	0.1	–
Zinc oxide fum e		1314 -13-2	–	5	–	10	–	–	–
Zinc oxide,		1314 -13-2	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust			–	10	–	–	–	–	–
Zinc stearat e		557 -05-1	–	5	–	–	–	–	–
Respi ra ble dust
Tota l dust			–	10	–	–	–	–	–
Zirconium  compoun ds (as Zr )		7440 -67-7	–	5	–	10	–	–	–
*              As determ ined from breath ing-zone a ir sam ples. **            Part s per billion. A                    The CAS num ber is for informat ion only.  En forcement is based on th e substan ce nam e.  For an entr y covering more than  1 meta l compoun d measur ed as th e meta l, th e CAS num ber for th e meta l is given - not th e CAS num ber for th e individua l compoun ds. B                    Part s of vapor or gas per million part s of contam inat ed air by volum e at 25°C an d 760 t orr . C                    Approximat e milligram s of substan ce per cubic meter of a ir . D                Durat ion is for 15 minut es, un less oth erwise noted. E                     The fina l benzene stan dar d in R 325 .77101 et seq. applies to all occu pat iona l exposur es t o ben zen e, except som e subseg ment s of industr y where exposur es ar e consistent ly un der th e action level.  Th ese subseg ment s include th e distr ibut ion an d sale of fuels, sealed conta iners  an d pipelines, coke production, oil an d gas dr illing an d production, natura l gas processi ng, an d th e percenta ge exclusion for liquid mixtur es.  For th e excepted subseg ment s, th e benzene limits in ta ble G-2 apply. F                     Caut ion--th is ru le conta ins extensive requirement s for exposur e to th ese substan ces.

 

TABLE G-2

 

 

EXP OSURE  LIMIT S FOR AIR CONTAMINATES

Substan ce	8-hour , t im e- weight ed avera ge	Accep ta ble ceiling concentrat ion	Accepta ble ma ximum peak above th e accepta ble ceiling concentrat ion for an 8-hour work shift.
			Concentrat ion	Maximum durat ion
S Benzene	10 ppm	25 ppm	50 ppm	10 minut es
Beryllium an d beryllium compoun ds	2 _g/m 3	5 _g/m 3	25 _g/m 3	30 minut es
S Eth ylene dibromide	20 ppm	30 ppm	50 ppm	5 m inut es

 

Note:  S above signifies that  sk in conta ct sha ll not be allowed .