Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › Occupational Health Standards › Part 301 - AIR CONTAMINANTS FOR GENERAL INDUSTRY › Section R. 325.51108 - Tables

Current through Vol. 24-12, July 15, 2024
Rule 8. Tables G-1-A and G-2 read as follows:
TABLE G-1-A. EXPOSURE LIMITS FOR AIR
								  CONTAMINANTS
TWA
STELD
Ceiling
Substance
CAS No.A
ppmB
mg/m3C
ppmB
mg/m3C
ppmB
mg/m3C
Skin Designation
Abate
-
15
-
-
-
-
-
Acetaldehyde
75-07-0
100
180
150
270
-
-
-
Acetic acid
64-19-7
10
25
-
-
-
-
-
Acetic anhydride
108-24-7
-
-
-
-
5
20
-
Acetone
67-64-1
750
1800
1000
2400
-
-
-
Acetonitrile
75-05-8
40
70
60
105
-
-
-
2-Acetylaminofluorine; see GI Part 350.
								  CarcinogensF
53-96-3
Acetylene dichloride; see
								  1,2-Dichloroethylene
Acetylene tetrabromide
79-27-6
1
14
-
-
-
-
-
Acetylsalicylic acid (Aspirin)
50-78-2
-
5
-
-
-
-
-
Acrolein
107-02-8
0.1
0.25
0.3
0.8
-
-
-
Acrylamide
79-06-1
-
0.03
-
-
-
-
x
Acrylic acid
79-10-7
10
30
-
-
-
-
x
Acrylonitrile; see GI & CS Part 307.
								  AcrylonitrileF
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 ether (AGE)
106-92-3
5
22
10
44
-
-
-
Allyl propyl disulfide
2179-59-1
2
12
3
18
-
-
-
[][ALPHA] Alumina (aluminum oxide)
Respirable fraction
Total dust
1344-28-1
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Aluminum (as Al)
Alkyls
Metal
Respirable dust
Total dust
Pyro powders
Soluble salts
Welding fumes*
7429-90-5
-
-
-
-
-
-
2
5
15
5
2
5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4-Aminodiphenyl; see GI Part 350.
								  CarcinogensF
92-67-1
2-Aminoethanol; see Ethanolamine
2-Aminopyridine
504-29-0
0.5
2
-
-
-
-
-
Amitrole
61-82-5
-
0.2
-
-
-
-
-
Ammonia
7664-41-7
-
-
35
24
-
-
-
Ammonium chloride fume
12125-02-9
-
10
-
20
-
-
-
Ammonium sulfamate
Respirable dust
Total dust
7773-06-0
-
-
5
10
-
-
-
-
-
-
-
-
-
-
n-Amyl acetate
628-63-7
100
525
-
-
-
-
-
sec-Amyl acetate
626-38-0
125
650
-
-
-
-
-
Aniline and homologues
62-53-3
2
8
-
-
-
-
x
Anisidine (o- and p-isomers)
29191-52-4
-
0.5
-
-
-
-
x
Antimony and compounds (as Sb)
7440-36-0
-
0.5
-
-
-
-
-
ANTU (alpha-naphthylthiourea)
86-88-4
-
0.3
-
-
-
-
-
Arsenic, organic compounds (as As)
7440-38-2
-
0.5
-
-
-
-
-
Arsenic, inorganic compounds (as As); see GI
								  & CS Part 308. Inorganic ArsenicF
7440-38-2
0.01
Arsine
7784-42-1
0.05
0.2
-
-
-
-
-
TWA
STELD
Asbestos; see OH Part 305. Asbestos for General
								  IndustryF
Varies
0.1f/cc
-
ppmB
mg/m3C
ppmB
mg/m3C
ppmB
mg/m3C
Skin Designation
Atrazine
1912-24-9
-
5
-
-
-
-
-
Azinphos-methyl
86-50-0
-
0.2
-
-
-
-
x
Barium, soluble compounds (as Ba)
7440-39-3
-
0.5
-
-
-
-
-
Barium sulfate
Respirable dust
Total dust
7727-43-7
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Benomyl
Respirable dust
Total dust
17804-35-2
-
-
5
10
-
-
-
-
-
-
-
-
-
-
BenzeneE; see GI &
								  CS Part 311. BenzeneF and TABLE G-2 for limits
								  applicable in the operations or sectors excluded in
								  R
								  325.77101E
71-43-2
1
3.19
5
15.97
Benzidine; see GI Part 350.
								  CarcinogensF
92-87-5
p-Benzoquinone; see Quinone
Benzo(a)pyrene; see Coal tar pitch
								  volatiles
Benzoyl peroxide
94-36-0
-
5
-
-
-
-
-
Benzyl chloride
100-44-7
1
5
-
-
-
-
-
Beryllium and beryllium compounds (as Be) see GI
								  Part 340. Beryllium
7440-41-7
-
0.0002 (0.2 µg/m3)
-
0.002 (2.0 µg/m3)
-
-
-
Biphenyl; see Diphenyl
Bismuth telluride, Undoped
Respirable dust
Total dust
1304-82-1
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Bismuth telluride, Se-doped
-
5
-
-
-
-
-
Borates, Tetra, Sodium Salts
Anhydrous
Decahydrate
Pentahydrate
1330-43-4 1303-96-4 12179-04-3
-
-
-
10
10
10
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Boron oxide, Total dust
1303-86-2
-
10
-
-
-
-
-
Boron tribromide
10294-33-4
-
-
-
-
1
10
-
Boron trifluoride
7637-07-2
-
-
-
-
1
3
-
Bromacil
314-40-9
1
10
-
-
-
-
-
Bromine
7726-95-6
0.1
0.7
0.3
2
-
-
-
Bromine pentafluoride
7789-30-2
0.1
0.7
-
-
-
-
-
Bromoform
75-25-2
0.5
5
-
-
-
-
-
1,3-Butadiene; see OH Part 312.
								  1,3-ButadieneF
106-99-0
1
2.2
5
11.1
-
-
-
Butane
106-97-8
800
1900
-
-
-
-
-
Butanethiol; see Butyl mercaptan
2-Butanone (Methyl ethyl ketone)
78-93-3
200
590
300
885
-
-
-
2-Butoxyethanol
111-76-2
25
120
-
-
-
-
x
n-Butyl acetate
123-86-4
150
710
200
950
-
-
-
sec-Butyl acetate
105-46-4
200
950
-
-
-
-
-
tert-Butyl acetate
540-88-5
200
950
-
-
-
-
-
Butyl acrylate
141-32-2
10
55
-
-
-
-
-
nButyl alcohol (n-butanol)
71-36-3
-
-
-
-
50
150
x
sec-Butyl alcohol (sec-butanol)
78-92-2
100
305
-
-
-
-
-
tert-Butyl alcohol (tert-butanol)
75-65-0
100
300
150
450
-
-
-
Butylamine
109-73-9
-
-
-
-
5
15
x
tert-Butyl chromate (as Cr+6); see OH Part 315.
								  Chromium (VI) in General IndustryF,G
1189-85-1
-
0.005 (5 µg/m3)
-
-
-
-
x
n-Butyl glycidyl ether (BGE)
2426-08-6
25
135
-
-
-
-
-
n-Butyl lactate
138-22-7
5
25
-
-
-
-
-
Butyl mercaptan
109-79-5
0.5
1.5
-
-
-
-
-
o-sec-Butylphenol
89-72-5
5
30
-
-
-
-
x
p-tert-Butyltoluene
98-51-1
10
60
20
120
-
-
-
Cadmium; see GI Part 309. Cadmium in General
								  IndustryF
7440-43-9
-
0.005
-
-
-
-
-
Calcium carbonate,
Respirable dust
Total dust
1317-65-3
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Calcium cyanamide
156-62-7
-
0.5
-
-
-
-
-
Calcium hydroxide
1305-62-0
-
5
-
-
-
-
-
Calcium oxide
1305-78-8
-
5
-
-
-
-
-
Calcium silicate,
Respirable dust
Total dust
1344-95-2
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Calcium sulfate,
Respirable dust
Total dust
7778-18-9
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Camphor, synthetic
76-22-2
-
2
-
-
-
-
-
Caprolactam,
Dust
Vapor
105-60-2
-
5
1
20
-
10
3
40
-
-
-
-
-
-
Captafol
								  (DifolatanR)
2425-06-1
-
0.1
-
-
-
-
-
Captan
133-06-2
-
5
-
-
-
-
-
Carbaryl
								  (SevinR)
63-25-2
-
5
-
-
-
-
-
Carbofuran
								  (FuradanR)
1563-66-2
-
0.1
-
-
-
-
-
Carbon black
1333-86-4
-
3.5
-
-
-
-
-
Carbon dioxide
124-38-9
5,000
9,000
30,00 0
54,000
-
-
-
Carbon disulfide
75-15-0
4
12
12
36
-
-
x
Carbon monoxide
630-08-0
35
40
-
-
200
229
-
Carbon tetrabromide
558-13-4
0.1
1.4
0.3
4
-
-
-
Carbon tetrachloride (Tetrachloromethane)
56-23-5
2
12.6
-
-
-
-
x
Carbonyl fluoride
353-50-4
2
5
5
15
-
-
-
Catechol (Pyrocatechol)
120-80-9
5
20
-
-
-
-
x
Cellulose,
Respirable dust
Total dust
9004-34-6
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Cesium hydroxide
21351-79-1
-
2
-
-
-
-
-
Chlordane
57-74-9
-
0.5
-
-
-
-
x
Chlorinated camphene (Toxaphone)
8001-35-2
-
0.5
-
1
-
-
x
Chlorinated 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 trifluoride
7790-91-2
-
-
-
-
0.1
0.4
-
Chloroacetaldehyde
107-20-0
-
-
-
-
1
3
-
2-Chloroacetophenone (Phenacyl chloride)
532-27-4
0.5
0.3
-
-
-
-
-
Chloroacetyl chloride
79-04-9
0.5
0.2
-
-
-
-
-
Chlorobenzene
108-90-7
75
350
-
-
-
-
-
o-Chlorobenzylidene malononitrile
2698-41-1
-
-
-
-
0.05
0.4
x
Chlorobromomethane
74-97-5
200
1050
-
-
-
-
-
2-Chloro-1,3-butadiene; see
								  [BETA][]-Chloroprene
Chlorodifluoromethane
75-45-6
1000
3500
-
-
-
-
-
Chlorodiphenyl (42% Chlorine) (PCB)
53469-21-9
-
1
-
-
-
-
x
Chlorodiphenyl (54% Chlorine) (PCB)
11097-69-1
-
0.5
-
-
-
-
x
1-Chloro-2,3-epoxy propane; see
								  Epichlorohydrin
2-Chloroethanol; see Ethylene chlorohydrin
Chloroethylene; see Vinyl chloride
Chloroform (Trichloromethane)
67-66-3
2
9.78
-
-
-
-
-
bis (Chloromethyl) ether; GI Part 350.
								  CarcinogensF
542-88-1
Chloromethyl methyl ether; see GI Part 350.
								  CarcinogensF
107-30-2
1-Chloro-1-nitropropane
600-25-9
4
10
-
-
-
-
-
Chloropentafluoroethane
76-15-3
1000
6320
-
-
-
-
-
Chloropicrin
76-06-2
0.1
0.7
-
-
-
-
-
beta-Chloroprene
126-99-8
10
35
-
-
-
-
x
o-Chlorostyrene
2039-87-4
50
285
75
428
-
-
-
o-Chlorotoluene
95-49-8
50
250
-
-
-
-
-
2-Chloro-6-(trichloromethyl) pyridine,
Respirable dust
Total dust
1929-82-4
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Chlorpyrifos
2921-88-2
-
0.2
-
-
-
-
x
Chromic acid and chromates (as Cr+6); see OH Part
								  315. Chromium (VI) in General IndustryF,G
Varies with compound
-
0.005 (5
								  µg/m3)
-
-
-
-
-
Chromium (II) compounds (as Cr)
7440-47-3
-
0.5
-
-
-
-
-
Chromium (III) compounds (as Cr)
7440-47-3
-
0.5
-
-
-
-
-
Chromium (VI) compounds; see OH Part 315.
								  Chromium (VI) in General IndustryF,G
Varies with compound
-
(5 µg/m3)
-
-
-
-
-
Chromium metal (as Cr)
7440-47-3
-
1
-
-
-
-
-
Chrysene; see Coal tar pitch volatile
Clopidol
Respirable dust Total dust
2971-90-6
-
5 15
-
-
-
-
-
Coal dust (less than 5%
								  SiO2) Respirable dust
-
-
2
-
-
-
-
-
Coal dust (greater than or equal to 5%
								  SiO2), Respirable dust
-
-
0.1
-
-
-
-
-
Coal tar pitch volatile (as benzene solubles)
								  anthracene, BaP, phenanthrene, acridine, crysene, pyrene
65996-93-2
-
0.2
-
-
-
-
-
Cobalt metal, dust, and fume (as Co)
7440-48-4
-
0.05
-
-
-
-
-
Cobalt carbonyl (as Co)
10210-68-1
-
0.1
-
-
-
-
-
Cobalt hydrocarbonyl (as Co)
16842-03-8
-
0.1
-
-
-
-
-
Coke oven emissions; see GI & CS Part 314.
								  Coke Oven EmissionsF
-
-
0.15 (150
								  µg/m3)
-
-
-
-
-
Copper,
Dusts and mists (as Cu)
Fume (as Cu)
7440-50-8
-
-
1
0.1
-
-
-
-
-
-
-
-
-
-
Cotton dust (raw)
-
-
1
-
-
-
-
-
Crag herbicide (Sesone)
Total dust
Respirable fraction
136-78-7
-
-
10
5
-
-
-
-
-
-
-
-
-
-
Cresol, all isomers
1319-77-3
5
22
-
-
-
-
x
Crotonaldehyde
123-73-9 4170-30-3
2
6
-
-
-
-
-
Crufomate
299-86-5
-
5
-
-
-
-
-
Cumene
98-82-8
50
245
-
-
-
-
x
Cyanamide
420-04-2
-
2
-
-
-
-
-
Cyanides (as CN)
Varies with compound
-
5
-
-
-
-
x
Cyanogen
460-19-5
10
20
-
-
-
-
-
Cyanogen chloride
506-77-4
-
-
-
-
0.3
0.6
-
Cyclohexane
110-82-7
300
1050
-
-
-
-
-
Cyclohexanol
108-93-0
50
200
-
-
-
-
x
Cyclohexanone
108-94-1
25
100
-
-
-
-
x
Cyclohexene
110-83-8
300
1015
-
-
-
-
-
Cyclohexylamine
108-91-8
10
40
-
-
-
-
-
Cyclonite
121-82-4
-
1.5
-
-
-
-
x
Cyclopentadiene
542-92-7
75
200
-
-
-
-
-
Cyclopentane
287-92-3
600
1720
-
-
-
-
-
Cyhexatin
13121-70-5
-
5
-
-
-
-
-
2,4-D (Dichlorophenoxyacetic acid)
94-75-7
-
10
-
-
-
-
-
Decaborane
17702-41-9
0.05
0.3
0.15
0.9
-
-
x
Demeton
								  (SystoxR)
8065-48-3
-
0.1
-
-
-
-
x
Diacetone alcohol
(4-Hydroxy-4-methyl-2-pentanone)
123-42-2
50
240
-
-
-
-
-
1,2-Diaminoethane; see Ethylenediamine
Diazinon
333-41-5
-
0.1
-
-
-
-
x
Diazomethane
334-88-3
0.2
0.4
-
-
-
-
-
Diborane
19287-45-7
0.1
0.1
-
-
-
-
-
2-N-Dibutylaminoethanol
102-81-8
2
14
-
-
-
-
-
Dibutyl phosphate
107-66-4
1
5
2
10
-
-
-
Dibutyl phthalate
84-74-2
-
5
-
-
-
-
-
Dichloroacetylene
7572-29-4
-
-
-
-
0.1
0.4
-
o-Dichlorobenzene
95-50-1
-
-
-
-
50
300
-
p-Dichlorobenzene
106-46-7
75
450
110
675
-
-
-
3,3'-Dichlorobenzidine; see GI Part 350.
								  CarcinogensF
91-94-1
Dichlorodifluoromethane
75-71-8
1000
4950
-
-
-
-
-
1,3-Dichloro-5,5-dimethyl hydantoin
118-52-5
-
0.2
-
0.4
-
-
-
Dichlorodiphenyltri-chloroethane (DDT)
50-29-3
-
1
-
-
-
-
x
1,1-Dichloroethane
75-34-3
100
400
-
-
-
-
-
1,2-Dichloroethylene
540-59-0
200
790
-
-
-
-
-
Dichloroethyl ether
111-44-4
5
30
10
60
-
-
x
Dichlorofluoromethane
75-43-4
10
40
-
-
-
-
-
Dichloromethane; see Methylene chloride
1,1-Dichloro-1-nitroethane
594-72-9
2
10
-
-
-
-
-
1,2-Dichloropropane; see Propylene
								  dichloride
1,3-Dichloropropene
542-75-6
1
5
-
-
-
-
x
2,2-Dichloropropionic acid
75-99-0
1
6
-
-
-
-
-
Dichlorotetrafluoroethane
76-14-2
1000
7000
-
-
-
-
-
Dichlorvos (DDVP)
62-73-7
-
1
-
-
-
-
x
Dicrotophos
141-66-2
-
0.25
-
-
-
-
x
Dicyclopentadiene
77-73-6
5
30
-
-
-
-
-
Dicyclopentadienyl iron,
Respirable dust
Total dust
102-54-5
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Dieldrin
60-57-1
-
0.25
-
-
-
-
X
Diethanolamine
111-42-2
3
15
-
-
-
-
-
Diethylamine
109-89-7
10
30
25
75
-
-
-
2-Diethylaminoethanol
100-37-8
10
50
-
-
-
-
X
Diethylene triamine
111-40-0
1
4
-
-
-
-
X
Diethyl ether; see Ethyl ether
Diethyl ketone
96-22-0
200
705
-
-
-
-
-
Diethyl phthalate
84-66-2
-
5
-
-
-
-
-
Difluorodibromomethane
75-61-6
100
860
-
-
-
-
-
Diglycidyl ether (DGE)
2238-07-5
0.1
0.5
-
-
-
-
-
Dihydroxybenzene; see Hydroquinone
Diisobutyl ketone
108-83-8
25
150
-
-
-
-
-
Diisopropylamine
108-18-9
5
20
-
-
-
-
X
4-Dimethylaminoazobenzene; see GI Part 350.
								  CarcinogensF
60-11-7
Dimethoxymethane; see Methylal
Dimethyl acetamide
127-19-5
10
35
-
-
-
-
X
Dimethylamine
124-40-3
10
18
-
-
-
-
-
Dimethylaminobenzene; see Xylidine
Dimethylaniline (N,N-Dimethylaniline)
121-69-7
5
25
10
50
-
-
X
Dimethylbenzene; see Xylene
Dimethyl-l,2-dibromo-2,2-dichloroethyl
								  phosphate
300-76-5
-
3
-
-
-
-
X
Dimethylformamide
68-12-2
10
30
-
-
-
-
X
2,6-Dimethyl-4-heptanone; see Diisobutyl
								  ketone
1,1 -Dimethylhydrazine
57-14-7
0.5
1
-
-
-
-
X
Dimethylphthalate
131-11-3
-
5
-
-
-
-
-
Dimethyl sulfate
77-78-1
0.1
0.5
-
-
-
-
X
Dinitolmide (3,5-Dinitro-o-toluamide)
148-01-6
-
5
-
-
-
-
-
Dinitrobenzene (all isomers)
(meta-)
(ortho)
(para-)
99-65-0
528-29-0
100-25-4
-
1
-
-
-
-
X
Dinitro-o-cresol
534-52-1
-
0.2
-
-
-
-
X
Dinitrotoluene
25321-14-6
-
1.5
-
-
-
-
X
Dioxane (Diethylene dioxide)
123-91-1
25
90
-
-
-
-
x
Dioxathion (Delnav)
78-34-2
-
0.2
-
-
-
-
x
Diphenyl (Biphenyl)
92-52-4
0.2
1
-
-
-
-
-
Diphenylamine
122-39-4
-
10
-
-
-
-
-
Diphenylmethane diisocyanate; see Methylene
								  bisphenyl isocyanate
Dipropylene glycol methyl ether
34590-94-8
100
600
150
900
-
-
x
Dipropyl ketone
123-19-3
50
235
-
-
-
-
-
Diquat
2768-72-9
-
0.5
-
-
-
-
-
Di-sec-octyl phthalate [Di(2-ethylhexyl)
								  phthalate]
117-81-7
-
5
-
10
-
-
-
Disulfiram
97-77-8
-
2
-
-
-
-
-
Disulfoton
298-04-4
-
0.1
-
-
-
-
x
2,6-Di-tert-butyl-p-cresol (Butylated
								  hydroxytoluene)
128-37-0
-
10
-
-
-
-
-
Diuron
330-54-1
-
10
-
-
-
-
-
Divinyl benzene
1321-74-0
10
50
-
-
-
-
-
Emery,
Respirable dust
Total dust
1302-74-5
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Endosulfan
115-29-7
-
0.1
-
-
-
-
x
Endrin
72-20-8
-
0.1
-
-
-
-
x
Epichlorohydrin
106-89-8
2
8
-
-
-
-
x
EPN
2104-64-5
-
0.5
-
-
-
-
x
1,2-Epoxypropane; see Propylene oxide
2,3-Epoxy-1-propanol; see Glycidol
Ethanethiol; see Ethyl mercaptan
Ethanolamine
141-43-5
3
8
6
15
-
-
-
Ethion
563-12-2
-
0.4
-
-
-
-
x
2-Ethoxyethanol (EGEE)
110-80-5
200
740
-
-
-
-
x
2-Ethoxyethyl acetate (Cellosolve acetate)
111-15-9
100
540
-
-
-
-
x
Ethyl acetate
141-78-6
400
1400
-
-
-
-
-
Ethyl acrylate
140-88-5
5
20
25
100
-
-
x
Ethyl alcohol (Ethanol)
64-17-5
1000
1900
-
-
-
-
-
Ethylamine
75-04-7
10
18
-
-
-
-
-
Ethyl amyl ketone (5-Methyl-3-heptanone)
541-85-5
25
130
-
-
-
-
-
Ethyl benzene
100-41-4
100
435
125
545
-
-
-
Ethyl bromide
74-96-4
200
890
250
1100
-
-
-
Ethyl butyl ketone (3-Heptanone)
106-35-4
50
230
-
-
-
-
-
Ethyl chloride
75-00-3
1000
2600
-
-
-
-
-
Ethyl ether
60-29-7
400
1200
500
1500
-
-
-
Ethyl formate
109-94-4
100
300
-
-
-
-
-
Ethyl mercaptan
75-08-1
0.5
1
-
-
-
-
-
Ethyl silicate
78-10-4
10
85
-
-
-
-
-
Ethylene chlorohydrin
107-07-3
-
-
-
-
1
3
x
Ethylenediamine
107-15-3
10
25
-
-
-
-
-
Ethylene dibromide
106-93-4
See table G-2
Ethylene dichloride
107-06-2
1
4
2
8
-
-
-
Ethylene glycol
107-21-1
-
-
-
-
50
125
-
Ethylene glycol dinitrate (EGDN)
628-96-6
-
-
-
0.1
-
-
x
Ethylene glycol methyl acetate (EGME); see Methyl
								  cellosolve acetate
Ethyleneimine; see GI Part 350.
								  CarcinogensF
151-56-4
Ethylene oxide; see GI & CS Part 304.
								  Ethylene OxideF
75-21-8
1
1.8
5
9.0
-
-
-
Ethylidene chloride; see
								  1,1-Dichloroethane
Ethylidene norbornene
16219-75-3
-
-
-
-
5
25
-
N-Ethylmorpholine
100-74-3
5
23
-
-
-
-
x
Fenamiphos
22224-92-6
-
0.1
-
-
-
-
x
Fensulfothion (Dasanit)
115-90-2
-
0.1
-
-
-
-
-
Fenthion
55-38-9
-
0.2
-
-
-
-
x
Ferbam, Dust
14484-64-1
-
10
-
-
-
-
-
Ferrovanadium dust
12604-58-9
-
1
-
3
-
-
-
Fluorides (as F)
Varies with compound
-
2.5
-
-
-
-
-
Fluorine
7782-41-4
0.1
0.2
-
-
-
-
-
Fluorotrichloromethane
								  (Trichlorofluoromethane)
75-69-4
-
-
-
-
1000
5600
-
Fonofos
944-22-9
-
0.1
-
-
-
-
x
Formaldehyde; see GI & CS Part 306.
								  FormaldehydeF
50-00-0
0.75
0.9
2
2.5
Formamide
75-12-7
20
30
30
45
-
-
-
Formic acid
64-18-6
5
9
-
-
-
-
-
Furfural
98-01-1
2
8
-
-
-
-
x
Furfuryl alcohol
98-00-0
10
40
15
60
-
-
x
Gasoline
8006-61-9
300
900
500
1500
-
-
-
Germanium tetrahydride
7782-65-2
0.2
0.6
-
-
-
-
-
Glutaraldehyde
111-30-8
-
-
-
-
0.2
0.8
-
Glycerin,
Respirable mist
Total mist
56-81-5
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Glycidol
556-52-5
25
75
-
-
-
-
-
Glycol monoethyl ether; see
								  2-Ethoxyethanol
Grain dust (Oat, wheat, barley)
-
-
10
-
-
-
-
-
Graphite, natural Respirable dust
7782-42-5
-
2.5
-
-
-
-
-
Graphite, synthetic,
Respirable dust
Total dust
-
-
-
5
10
-
-
-
-
-
-
-
-
-
-
GuthionR; see Azinphos
								  methyl
Gypsum,
Respirable dust
Total dust
13397-24-5
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Hafnium
7440-58-6
-
0.5
-
-
-
-
-
Heptachlor
76-44-8
-
0.5
-
-
-
-
x
Heptane (n-Heptane)
142-82-5
400
1600
500
2000
-
-
-
Hexachlorobutadiene
87-68-3
-
0.02
0.24
-
-
-
-
Hexachlorocyclopentadiene
77-47-4
0.01
0.1
-
-
-
-
-
Hexachloroethane
67-72-1
1
10
-
-
-
-
x
Hexachloronaphthalene
1335-87-1
-
0.2
-
-
-
-
x
Hexafluoroacetone
684-16-2
0.1
0.7
-
-
-
-
x
n-Hexane
110-54-3
50
180
-
-
-
-
-
Hexane isomers
Varies with compound
500
1800
1000
3600
-
-
-
2-Hexanone (Methyl n-butyl ketone)
591-78-6
5
20
-
-
-
-
-
Hexone (Methyl isobutyl ketone)
108-10-1
50
205
75
300
-
-
-
sec-Hexyl acetate
108-84-9
50
300
-
-
-
-
-
Hexylene glycol
107-41-5
-
-
-
-
25
125
-
Hydrazine
302-01-2
0.1
0.1
-
-
-
-
x
Hydrogenated terphenyls
61788-32-7
0.5
5
-
-
-
-
-
Hydrogen bromide
10035-10-6
-
-
-
-
3
10
-
Hydrogen chloride
7647-01-0
-
-
-
-
5
7
-
Hydrogen cyanide
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 acrylate
999-61-1
0.5
3
-
-
-
-
x
Indene
95-13-6
10
45
-
-
-
-
-
Indium and compounds (as In)
7440-74-6
-
0.1
-
-
-
-
-
Iodine
7553-56-2
-
-
-
-
0.1
1
-
Iodoform
75-47-8
0.6
10
-
-
-
-
-
Iron oxide fume
1309-37-1
-
10
-
-
-
-
-
Iron pentacarbonyl (as Fe)
13463-40-6
0.1
0.8
0.2
1.6
-
-
-
Iron salts (soluble) (as Fe)
Varies with compound
-
1
-
-
-
-
-
Isoamyl acetate
123-92-2
100
525
-
-
-
-
-
Isoamyl alcohol (primary and secondary)
123-51-3
100
360
125
450
-
-
-
Isobutyl acetate
110-19-0
150
700
-
-
-
-
-
Isobutyl alcohol
78-83-1
50
150
-
-
-
-
-
Isooctyl alcohol
26952-21-6
50
270
-
-
-
-
x
Isophorone
78-59-1
4
23
-
-
-
-
-
Isophorone diisocyanate (IPDI)
4098-71-9
0.005
-
0.02
-
-
-
x
2-Isopropoxyethanol
109-59-1
25
105
-
-
-
-
-
Isopropyl acetate
108-21-4
250
950
310
1185
-
-
-
Isopropyl alcohol
67-63-0
400
980
500
1225
-
-
-
Isopropylamine
75-31-0
5
12
10
24
-
-
-
N-Isopropylaniline
768-52-5
2
10
-
-
-
-
x
Isopropyl ether
108-20-3
500
2100
-
-
-
-
-
Isopropyl glycidyl ether (IGE)
4016-14-2
50
240
75
360
-
-
-
Kaolin,
Respirable dust
Total dust
-
-
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Ketene
463-51-4
0.5
0.9
1.5
3
-
-
-
Lead inorganic (as Pb); see GI Part 310. Lead in
								  General IndustryF
7439-92-1
-
0.05 (50 µg/m3)
-
-
-
-
-
Limestone, (calcium carbonate)
Respirable dust
Total dust
1317-65-3
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Lindane
58-89-9
-
0.5
-
-
-
-
x
Lithium hydride
7580-67-8
-
0.025
-
-
-
-
-
L.P.G. (Liquified petroleum gas)
68476-85-7
1000
1800
-
-
-
-
-
Magnesite,
Respirable dust
Total dust
546-93-0
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Magnesium oxide fume, Total particulate
1309-48-4
-
10
-
-
-
-
-
Malathion dust
121-75-5
-
10
-
-
-
-
x
Maleic anhydride
108-31-6
1
-
-
-
-
-
-
Manganese,
Compounds (as Mn)
Fume (as Mn)
7439-96-5
-
-
-
1
-
-
-
3
-
-
5
-
-
-
Manganese cyclopentadienyl tricarbonyl (as
								  Mn)
12079-65-1
-
0.1
-
-
-
-
x
Manganese tetroxide (as Mn)
1317-35-7
-
1
-
-
-
-
-
Marble (calcium carbonate),
Respirable dust
Total dust
1317-65-3
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Mercury
Inorganic and aryl compounds (As Hg)
Organic compounds (as Hg)
Vapor (as Hg)
7439-97-6
-
-
-
-
0.01
0.05
-
-
-
0.03
-
-
-
-
0.1
-
-
x
x
x
Mesityl oxide
141-79-7
15
60
25
100
-
-
-
Methacrylic acid
79-41-4
20
70
-
-
-
-
x
Methanethiol; see Methyl mercaptan
Methomyl (Lannate)
16752-77-5
-
2.5
-
-
-
-
-
Methoxychlor dust
72-43-5
-
10
-
-
-
-
-
2-Methoxyethanol; see Methyl cellosolve
4-Methoxyphenol
150-76-5
-
5
-
-
-
-
-
Methyl acetate
79-20-9
200
610
250
760
-
-
-
Methyl acetylene (Propyne)
74-99-7
1000
1650
-
-
-
-
-
Methyl acetylene-propadiene mixture (MAPP)
-
1000
1800
1250
2250
-
-
-
Methyl acrylate
96-33-3
10
35
-
-
-
-
x
Methylacrylonitrile
126-98-7
1
3
-
-
-
-
x
Methylal (Dimethoxymethane)
109-87-5
1000
3100
-
-
-
-
-
Methyl alcohol
67-56-1
200
260
250
325
-
-
x
Methylamine
74-89-5
10
12
-
-
-
-
-
Methyl amyl alcohol; see Methyl isobutyl
								  carbinol
Methyl n-amyl ketone
110-43-0
100
465
-
-
-
-
-
Methyl bromide
74-83-9
5
20
-
-
-
-
x
Methyl n-butyl ketone; see 2-Hexanone
Methyl cellosolve (2-Methoxyethanol)
109-86-4
25
80
-
-
-
-
x
Methyl cellosolve acetate (2-Methoxyethyl
								  acetate)
110-49-6
25
120
-
-
-
-
x
Methyl chloride
74-87-3
50
105
100
210
-
-
-
Methyl chloroform (1,1,1-Trichloroethane)
71-55-6
350
1900
450
2450
-
-
-
Methyl 2-cyanoacrylate
137-05-3
2
8
4
16
-
-
-
Methylcyclohexane
108-87-2
400
1600
-
-
-
-
-
Methylcyclohexanol
25639-42-3
50
235
-
-
-
-
-
o-Methylcyclohexanone
583-60-8
50
230
75
345
-
-
x
Methylcyclopentadienyl manganese tricarbonyl (as
								  Mn)
12108-13-3
-
0.2
-
-
-
-
x
Methyl demeton
8022-00-2
-
0.5
-
-
-
-
x
4,4'-Methylene bis(2-chloroaniline)
								  (MBOCA)
101-14-4
0.02
0.22
-
-
-
-
x
Methylene bis(4-cyclohexylisocyanate)
								  (MCBI)
5124-30-1
-
-
-
-
0.01
0.11
-
Methylene bisphenyl isocyanate (MDI)
101-68-8
-
-
-
-
0.02
0.2
-
Methylene chloride, see OH Part 313. Methylene
								  ChlorideF
75-09-2
25
87
125
434
-
-
-
Methylenedianiline (MDA); see GI Part 303.
Methylenedianiline (MDA) in General
								  IndustryF
101-77-9
10 ppb**
0.08 mg/m3
100 ppb**
0.8 mg/m3
-
-
-
Methyl ethyl ketone (MEK); see 2-Butanone
Methyl ethyl ketone peroxide (MEKP)
1338-23-4
-
-
-
-
0.7
5
-
Methyl formate
107-31-3
100
250
150
375
-
-
-
Methyl hydrazine
60-34-4
-
-
-
-
0.2
0.35
x
Methyl iodide
74-88-4
2
10
-
-
-
-
x
Methyl isoamyl ketone
110-12-3
50
240
-
-
-
-
-
Methyl isobutyl carbinol
108-11-2
25
100
40
165
-
-
x
Methyl isobutyl ketone; see Hexone
Methyl isocyanate (MIC)
624-83-9
0.02
0.05
-
-
-
-
x
Methyl isopropyl ketone
563-80-4
200
705
-
-
-
-
-
Methyl mercaptan
74-93-1
0.5
1
-
-
-
-
-
Methyl methacrylate
80-62-6
100
410
-
-
-
-
-
Methyl parathion
298-00-0
-
0.2
-
-
-
-
x
Methyl propyl ketone; see 2-Pentanone
Methyl silicate
681-84-5
1
6
-
-
5
30
-
alpha-Methyl styrene
98-83-9
50
240
100
485
-
-
-
Metribuzin
21087-64-9
-
5
-
-
-
-
-
Mica; see Silicates
Molybdenum, (as Mo)
Insoluble compounds
Soluble compounds
7439-98-7
-
-
10
5
-
-
-
-
-
-
-
-
-
-
Monocrotophos
								  (AzodrinR)
6923-22-4
-
0.25
-
-
-
-
-
Monomethyl aniline
100-61-8
0.5
2
-
-
-
-
x
Morpholine
110-91-8
20
70
30
105
-
-
x
Naphtha (Coal tar)
8030-30-6
100
400
-
-
-
-
-
Naphthalene
91-20-3
10
50
15
75
-
-
-
alpha-Naphthylamine; see GI Part 350.
								  CarcinogensF
134-32-7
beta-Naphthylamine; see GI Part 350.
								  CarcinogensF
91-59-8
Nickel carbonyl (as Ni)
13463-39-3
0.001
0.007
-
-
-
-
-
Nickel,
Metal and insoluble compounds (as Ni)
Soluble compounds (as Ni)
7440-02-0
-
-
1
0.1
-
-
-
-
-
-
-
-
-
-
Nicotine
54-11-5
-
0.5
-
-
-
-
x
Nitric acid
7697-37-2
2
5
4
10
-
-
-
Nitric oxide
10102-43-9
25
30
-
-
-
-
-
p-Nitroaniline
100-01-6
-
3
-
-
-
-
X
Nitrobenzene
98-95-3
1
5
-
-
-
-
X
p-Nitrochl orob enzene
100-00-5
-
1
-
-
-
-
X
4-Nitrodiphenyl; see GI Part 350.
								  CarcinogensF
92-93-3
Nitroethane
79-24-3
100
310
-
-
-
-
-
Nitrogen dioxide
10102-44-0
-
-
1
1.8
-
-
-
Nitrogen trifluoride
7783-54-2
10
29
-
-
-
-
-
Nitroglycerin
55-63-0
-
-
-
0.1
-
-
XX
Nitrom ethane
75-52-5
100
250
-
-
-
-
-
1-Nitropropane
108-03-2
25
90
-
-
-
-
-
2-Nitropropane
79-46-9
10
35
-
-
-
-
-
N-Nitrosodimethylamine; see GI Part 350.
								  CarcinogensF
62-75-9
Nitrotoluene (o-,m-,p-isomers)
99-08-1
2
11
-
-
-
-
X
Nitrotrichloromethane; see Chloropicrin
Nonane
111-84-2
200
1050
-
-
-
-
-
Octachloronaphthalene
2234-13-1
-
0.1
-
0.3
-
-
x
Octane
111-65-9
300
1450
375
1800
-
-
-
Oil mist, mineral
8012-95-1
-
5
-
-
-
-
-
Osmium tetroxide (as Os)
20816-12-0
-
0.002
-
0.006
-
-
-
Oxalic acid
144-62-7
-
1
-
2
-
-
-
Oxygen difluoride
7783-41-7
-
-
-
-
0.05
0.1
-
Ozone
10028-15-6
0.1
0.2
0.3
0.6
-
-
-
Paraffin wax fume
8002-74-2
-
2
-
-
-
-
-
Paraquat, respirable dust
1910-42-5
2074-50-2
4685-14-7
-
0.1
-
-
-
-
x
Parathion
56-38-2
-
0.1
-
-
-
-
x
Particulates not otherwise regulated,
Respirable dust
Total dust
-
-
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Pentaborane
19624-22-7
0.005
0.01
0.015
0.03
-
-
-
Pentachloronaphthalene
1321-64-8
-
0.5
-
-
-
-
x
Pentachlorophenol
87-86-5
-
0.5
-
-
-
-
x
Pentaerythritol,
Respirable dust
Total dust
115-77-5
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Pentane
109-66-0
600
1800
750
2250
-
-
-
2-Pentanone (Methyl propyl ketone)
107-87-9
200
700
250
875
-
-
-
Perchloroethylene (Tetrachloroethylene)
127-18-4
25
170
-
-
-
-
-
Perchloromethyl mercaptan
594-42-3
0.1
0.8
-
-
-
-
-
Perchloryl fluoride
7616-94-6
3
14
6
28
-
-
-
Perlite
Respirable dust
Total dust
93763-70-3
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Petroleum distillates (Naphtha) (Rubber
								  solvent)
-
400
1600
-
-
-
-
-
Phenol
108-95-2
5
19
-
-
-
-
x
Phenothiazine
92-84-2
-
5
-
-
-
-
x
p-Phenylenediamine
106-50-3
-
0.1
-
-
-
-
x
Phenyl ether, vapor
101-84-8
1
7
-
-
-
-
-
Phenyl ether-biphenyl mixture, vapor
-
1
7
-
-
-
-
-
Phenylethylene; see Styrene
Phenyl glycidyl ether (PGE)
122-60-1
1
6
-
-
-
-
-
Phenylhydrazine
100-63-0
5
20
10
45
-
-
x
Phenyl mercaptan
108-98-5
0.5
2
-
-
-
-
-
Phenylphosphine
638-21-1
-
-
-
-
0.05
0.25
-
Phorate
298-02-2
-
0.05
-
0.2
-
-
x
Phosdrin
								  (MevinphosR)
7786-34-7
-
0.1
-
0.3
-
-
x
Phosgene (Carbonyl chloride)
75-44-5
0.1
0.4
-
-
-
-
-
Phosphine
7803-51-2
0.3
0.4
1
1
-
-
-
Phosphoric acid
7664-38-2
-
1
-
3
-
-
-
Phosphorus (yellow)
7723-14-0
-
0.1
-
-
-
-
-
Phosphorus oxychloride
10025-87-3
0.1
0.6
-
-
-
-
-
Phosphorus pentachloride
10026-13-8
-
1
-
-
-
-
-
Phosphorus pentasulfide
1314-80-3
-
1
-
3
-
-
-
Phosphorus trichloride
7719-12-2
0.2
1.5
0.5
3
-
-
-
Phthalic anhydride
85-44-9
1
6
-
-
-
-
-
m-Phthalodinitrile
626-17-5
-
5
-
-
-
-
-
Picloram,
Respirable dust
Total dust
1918-02-1
-
-
5
10
-
-
-
-
-
-
-
Picric acid
88-89-1
-
0.1
-
-
-
-
x
Piperazine dihydrochloride
142-64-3
-
5
-
-
-
-
-
Pindone (2-Pivalyl-1,3-indandione)
83-26-1
-
0.1
-
-
-
-
-
Plaster of Paris (Calcium sulfate),
Respirable dust
Total dust
26499-65-0
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Platinum (as Pt)
Metal
Soluble salts
7440-06-4
-
-
1
0.002
-
-
-
-
-
-
-
-
-
-
Portland cement,
Respirable dust
Total dust
65997-15-1
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Potassium hydroxide
1310-58-3
-
-
-
-
-
2
-
Propane
74-98-6
1000
1800
-
-
-
-
-
Propargyl alcohol
107-19-7
1
2
-
-
-
-
x
beta-Propriolactone; see GI Part 350.
								  CarcinogensF
57-57-8
Propionic acid
79-09-4
10
30
-
-
-
-
-
Propoxur (Baygon)
114-26-1
-
0.5
-
-
-
-
-
n-Propyl acetate
109-60-4
200
840
250
1050
-
-
-
n-Propyl alcohol
71-23-8
200
500
250
625
-
-
-
n-Propyl nitrate
627-13-4
25
105
40
170
-
-
-
Propylene dichloride
78-87-5
75
350
110
510
-
-
-
Propylene glycol dinitrate
6423-43-4
0.05
0.3
-
-
-
-
-
Propylene glycol monomethyl ether
107-98-2
100
360
150
540
-
-
-
Propylene imine
75-55-8
2
5
-
-
-
-
x
Propylene oxide
75-56-9
20
50
-
-
-
-
-
Propyne; see Methyl acetylene
Pyrethrum
8003-34-7
-
5
-
-
-
-
-
Pyridine
110-86-1
5
15
-
-
-
-
-
Quinone
106-51-4
0.1
0.4
-
-
-
-
-
Resorcinol
108-46-3
10
45
20
90
-
-
-
Rhodium,
Insoluble compounds (as Rh)
Metal fume (as Rh)
Soluble compounds (as Rh)
7440-16-6
-
-
-
0.1
0.1
0.001
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Ronnel
299-84-3
-
10
-
-
-
-
-
Rosin core solder pyrolysis products, as
								  formaldehyde
-
-
0.1
-
-
-
-
-
Rotenone
83-79-4
-
5
-
-
-
-
-
Rouge,
Respirable dust
Total dust
-
-
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Selenium compounds (as Se)
7782-49-2
-
0.2
-
-
-
-
-
Selenium hexafluoride (as Se)
7783-79-1
0.05
0.4
-
-
-
-
-
Silica, amorphous, precipitated and gel
112926-00-8
-
6
-
-
-
-
-
Silica, amorphous, diatomaceous earth, containing
								  less than 1% crystalline silica
61790-53-2
-
6
-
-
-
-
-
Silica, crystalline, respirable dust See GI Part
								  590. Silica in General Industry
Cristobalite
14464-46-1
-
0.05
-
-
-
-
-
Quartz
14808-60-7
-
0.05
-
-
-
-
-
Tridymite
15468-32-3
-
0.05
-
-
-
-
-
Tripoli (as quartz)
1317-95-9
-
0.05
-
-
-
-
-
Silica, fused, Respirable dust
60676-86-0
-
0.1
-
-
-
-
-
Silicates (less than 1% crystalline
								  silica)
Mica, respirable dust
12001-26-2
-
3
-
-
-
-
-
Soapstone, respirable dust
-
-
3
-
-
-
-
-
Soapstone, total dust
-
-
6
-
-
-
-
-
Talc (containing asbestos); use asbestos
								  limit
-
OH Part 305 "Asbestos for General
								  Industry,"
Talc (containing no asbestos), respirable
								  dust
14807-96-6
-
2
-
-
-
-
-
Tremolite
-
OH Part 305 "Asbestos for General
								  Industry,"
Silicon,
Respirable dust
Total dust
7440-21-3
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Silicon carbide,
Respirable dust
Total dust
409-21-2
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Silicon tetrahydride
7803-62-5
5
7
-
-
-
-
-
Silver, metal and soluble compounds (as
								  Ag)
7440-22-4
-
0.01
-
-
-
-
-
Soapstone; see Silicates
Sodium azide
(as HN3)
(as NaN3)
26628-22-8
-
-
-
-
-
-
-
-
0.1
-
-
0.3
x
x
Sodium bisulfite
7631-90-5
-
5
-
-
-
-
-
Sodium fluoroacetate
62-74-8
-
0.05
-
0.15
-
-
x
Sodium hydroxide
1310-73-2
-
-
-
-
-
2
-
Sodium metabisulfite
7681-57-4
-
5
-
-
-
-
-
Starch,
Respirable dust
Total dust
9005-25-8
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Stibine
7803-52-3
0.1
0.5
-
-
-
-
-
Stoddard solvent
8052-41-3
100
525
-
-
-
-
-
Strychnine
57-24-9
-
0.15
-
-
-
-
-
Styrene
100-42-5
50
215
100
425
-
-
-
Subtilisins (Proteolytic enzymes)
9014-01-1
-
-
-
0.00006 (60 min.)
-
-
-
Sucrose,
Respirable dust
Total dust
57-50-1
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Sulfur dioxide
7446-09-5
2
5
5
10
-
-
-
Sulfur hexafluoride
2551-62-4
1000
6000
-
-
-
-
-
Sulfuric acid
7664-93-9
-
1
-
-
-
-
-
Sulfur monochloride
10025-67-9
-
-
-
-
1
6
-
Sulfur pentafluoride
5714-22-7
-
-
-
-
0.01
0.1
-
Sulfur tetrafluoride
7783-60-0
-
-
-
-
0.1
0.4
-
Sulfuryl fluoride
2699-79-8
5
20
10
40
-
-
-
Sulprofos
35400-43-2
-
1
-
-
-
-
-
SystoxR; see
								  Demeton
2,4,5-T (2,4,5-trichlorophenoxyacetic
								  acid)
93-76-5
-
10
-
-
-
-
-
Talc; see Silicates
Tantalum, metal and oxide dust
7440-25-7
-
5
-
-
-
-
-
TEDP (Sulfotep)
3689-24-5
-
0.2
-
-
-
-
x
Tellurium and compounds (as Te)
13494-80-9
-
0.1
-
-
-
-
-
Tellurium hexafluoride (as Te)
7783-80-4
0.02
0.2
-
-
-
-
-
Temephos,
Respirable dust
Total dust
3383-96-8
-
-
5
10
-
-
-
-
-
-
-
-
-
-
TEPP
107-49-3
-
0.05
-
-
-
-
x
Terphenyls
26140-60-3
-
-
-
-
0.5
5
-
1,1,1,2-Tetrachloro-2, 2-difluoroethane
76-11-9
500
4170
-
-
-
-
-
1,1,2,2-Tetrachloro-1, 2-difluoroethane
76-12-0
500
4170
-
-
-
-
-
1,1,2,2-Tetrachloroethane
79-34-5
1
7
-
-
-
-
x
Tetrachloroethylene; see Perchloroethylene
Tetrachloromethane; see Carbon
								  tetrachloride
Tetrachloronaphthalene
1335-88-2
-
2
-
-
-
-
x
Tetraethyl lead (as Pb)
78-00-2
-
0.075
-
-
-
-
x
Tetrahydrofuran
109-99-9
200
590
250
735
-
-
-
Tetramethyl lead (as Pb)
75-74-1
-
0.075
-
-
-
-
x
Tetramethyl succinonitrile
3333-52-6
0.5
3
-
-
-
-
x
Tetranitromethane
509-14-8
1
8
-
-
-
-
-
Tetrasodium pyrophosphate
7722-88-5
-
5
-
-
-
-
-
Tetryl
								  (2,4,6-Trinitrophenylmethylnitramine)
479-45-8
-
1.5
-
-
-
-
x
Thallium, soluble compounds (as Tl)
7440-28-0
-
0.1
-
-
-
-
x
4,4'-Thiobis(6-tert-butyl-m-cresol)
Respirable dust
Total dust
96-69-5
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Thioglycolic acid
68-11-1
1
4
-
-
-
-
x
Thionyl chloride
7719-09-7
-
-
-
-
1
5
-
Thiram
137-26-8
-
5
-
-
-
-
-
Tin, Inorganic compounds (except oxides) (as
								  Sn)
Organic compounds (as Sn)
Oxides (as Sn)
7440-31-5
7440-31-5
21651-19-4
-
-
-
2
0.1
2
-
-
-
-
-
-
-
-
-
-
-
-
-
x
-
Titanium dioxide Total dust
13463-67-7
-
10
-
-
-
-
-
Toluene
108-88-3
100
375
150
560
-
-
-
Toluene-2,4-diisocyanate (TDI)
584-84-9
0.005
0.04
0.02
0.15
-
-
-
m-Toluidine
108-44-1
2
9
-
-
-
-
x
o-Toluidine
95-53-4
5
22
-
-
-
-
x
p-Toluidine
106-49-0
2
9
-
-
-
-
x
Toxaphene; see Chlorinated camphene
Tremolite; see Silicates
Tributyl phosphate
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-Trichloroethane; see Methyl
								  chloroform
1,1,2-Trichloroethane
79-00-5
10
45
-
-
-
-
x
Trichloroethylene
79-01-6
50
270
200
1080
-
-
-
Trichloromethane; see Chloroform
Trichloronaphthalene
1321-65-9
-
5
-
-
-
-
x
1,2,3-Trichloropropane
96-18-4
10
60
-
-
-
-
-
1,1,2-Trichloro-1,2,2-trifluoroethane
76-13-1
1000
7600
1250
9500
-
-
-
Triethylamine
121-44-8
10
40
15
60
-
-
-
Trifluorobromomethane
75-63-8
1000
6100
-
-
-
-
-
Trimellitic anhydride
552-30-7
0.005
0.04
-
-
-
-
-
Trimethylamine
75-50-3
10
24
15
36
-
-
-
Trimethyl benzene
25551-13-7
25
125
-
-
-
-
-
Trimethyl phosphite
121-45-9
2
10
-
-
-
-
-
2,4,6-Trinitrophenol; see Picric acid
2,4,6-Trinitrophenylmethylnitramine; see
								  Tetryl
2,4,6-Trinitrotoluene (TNT)
118-96-7
-
0.5
-
-
-
-
x
Triorthocresyl phosphate
78-30-8
-
0.1
-
-
-
-
x
Triphenyl amine
603-34-9
-
5
-
-
-
-
-
Triphenyl phosphate
115-86-6
-
3
-
-
-
-
-
Tungsten
Insoluble compounds (as W)
Soluble compounds (as W)
7440-33-7
-
-
5
1
-
-
10
3
-
-
-
-
-
-
Turpentine
8006-64-2
100
560
-
-
-
-
-
Uranium (as U)
Insoluble compounds Soluble compounds
7440-61-1
-
-
0.2
0.05
-
-
0.6
-
-
-
-
-
-
-
n-Valeraldehyde
110-62-3
50
175
-
-
-
-
-
Vanadium pentoxide Fume (as
								  V2O5)
Respirable dust (as
								  V2O5)
1314-62-1
-
-
0.05
0.05
-
-
-
-
-
-
-
-
-
-
VegeTABLE oil mists
Respirable mist
Total mist
-
-
-
5
15
-
-
-
-
-
-
-
-
-
-
Vinyl acetate
108-05-4
10
30
20
60
-
-
-
Vinyl benzene; see Styrene
Vinyl bromide
593-60-2
5
20
-
-
-
-
-
Vinyl chloride; see GI Part 302. Vinyl
								  ChlorideF
75-01-4
1
2.5
5
12.8
-
-
-
Vinyl cyanide; see Acrylonitrile
Vinyl cyclohexene dioxide
106-87-6
10
60
-
-
-
-
x
Vinylidene chloride (1,1-Dichloroethylene)
75-35-4
1
4
-
-
-
-
-
Vinyl toluene
25013-15-4
100
480
-
-
-
-
-
VM & P Naphtha
8032-32-4
300
1350
400
1800
-
-
-
Warfarin
81-81-2
-
0.1
-
-
-
-
-
Welding fumes (Total particulate)*
-
-
5
-
-
-
-
-
Wood dust, all soft and hard woods (except
								  Western red cedar)
-
-
5
-
10
-
-
-
Wood dust, Western red cedar
-
-
2.5
-
-
-
-
-
Xylene (o-,m-,p-isomers) (Dimethyl
								  benzene)
1330-20-7
100
435
150
655
-
-
-
m-Xylene-alpha, alpha-diamine
1477-55-0
-
-
-
-
-
0.1
x
Xylidine
1300-73-8
2
10
-
-
-
-
x
Yttrium
7440-65-5
-
1
-
-
-
-
-
Zinc chloride fume
7646-85-7
-
1
-
2
-
-
-
Zinc chromates (as Cr+6); see OH Part 315.
								  Chromium (VI) in General IndustryF,G
Varies with compound
-
0.005 (5 µg/m3)
-
-
-
-
-
Zinc oxide fume
1314-13-2
-
5
-
10
-
-
-
Zinc oxide,
Respirable dust
Total dust
1314-13-2
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Zinc stearate
Respirable dust
Total dust
557-05-1
-
-
5
10
-
-
-
-
-
-
-
-
-
-
Zirconium compounds (as Zr)
7440-67-7
-
5
-
10
-
-
-
All MIOSHA Standards shown in this TABLE are
								  referenced in
								  R
								  325.51101.
*
As determined from breathing-zone air
								  samples.
**
Parts per billion.
A
The CAS number is for information only.
								  Enforcement is based on the substance name. For an entry covering more than 1
								  metal compound measured as the metal, the CAS number for the metal is given -
								  not the CAS number for the individual compounds.
B
Parts of vapor or gas per million parts of
								  contaminated air by volume at 25 Chr(176)C and 760 Torr.
C
Approximate milligrams of substance per cubic
								  meter of air.
D
Duration is for 15 minutes, unless otherwise
								  noted.
E
The GI & CS Part 311. "Benzene" standard
								  applies to all occupational exposures to benzene, except some sub-segments of
								  industry where exposures are consistently under the action level. These
								  sub-segments include the distribution and sale of fuels, sealed containers and
								  pipelines, coke production, oil and gas drilling and production, natural gas
								  processing, and the percentage exclusion for liquid mixtures. For the excepted
								  sub-segments, the benzene limits in TABLE G-2 apply.
F
Caution--this rule contains extensive
								  requirements for exposure to these substances.
G
If the exposure limit in OH Part 315. "Chromium
								  (VI) in General In y" is stayed or is otherwise not in effect, the exposure
								  limit is a ceiling of 0.1 mg/m3.
TABLE G-2. XPOSURE LIMITS FOR AIR
								  CONTAMINATES
Substance
8-hour, time-weighted average
AccepTABLE ceiling concentration
AccepTABLE maximum peak above the accepTABLE
								  ceiling concentration for an 8-hour workshift.
Concentration
Maximum duration
S
BenzeneE,F
10 ppm
25 ppm
50 ppm
10 minutes
S
Ethylene dibromide
20 ppm
30 ppm
50 ppm
5 minutes
Note: S above signifies that skin contact shall
								  not be allowed.
E
The GI & CS Part 311. "Benzene" standard
								  applies to all occupational exposures to benzene, except some sub-segments of
								  industry where exposures are consistently under the action level. These
								  sub-segments include the distribution and sale of fuels, sealed containers and
								  pipelines, coke production, oil and gas drilling and production, natural gas
								  processing, and the percentage exclusion for liquid mixtures. For the excepted
								  sub-segments, the benzene limits in this TABLE apply.
F
Caution--this rule contains extensive
								  requirements for exposure to these substances.