|
Substance |
Original IDLH Value |
Revised IDLH Value |
Acetaldehyde |
10,000 ppm |
2,000 ppm |
Acetic acid |
1,000 ppm |
50 ppm |
Acetic anhydride |
1,000 ppm |
200 ppm |
Acetone |
20,000 ppm |
2,500 ppm [LEL] |
Acetonitrile |
4,000 ppm |
500 ppm |
Acetylene tetrabromide |
10 ppm |
8 ppm |
Acrolein |
5 ppm |
2 ppm |
Acrylamide |
Unknown |
60 mg/m3 |
Acrylonitrile |
500 ppm |
85 ppm |
Aldrin |
100 mg/m3 |
25 mg/m3 |
Allyl alcohol |
150 ppm |
20 ppm |
Allyl chloride |
300 ppm |
250 ppm |
Allyl glycidyl ether |
270 ppm |
50 ppm |
2 Aminopyridine |
5 ppm |
5 ppm [Unch] |
Ammonia |
500 ppm |
300 ppm |
Ammonium sulfamate |
5,000 mg/m3 |
1,500 mg/m3 |
n-Amyl acetate |
4,000 ppm |
1,000 ppm |
sec-Amyl acetate |
9,000 ppm |
1,000 ppm |
Aniline |
100 ppm |
100 ppm [Unch] |
o-Anisidine |
50 mg/m3 |
50 mg/m3 [Unch] |
p-Anisidine |
50 mg/m3 |
50 mg/m3 [Unch] |
Antimony compounds (as Sb) |
80 mg Sb/m3 |
50 mg Sb/m3 |
ANTU |
100 mg/m3 |
100 mg/m3 [Unch] |
Arsenic (inorganic compounds, as As) |
100 mg As/m3 |
5 mg As/m3 |
Arsine |
6 ppm |
3 ppm |
Azinphosmethyl |
20 mg/m3 |
10 mg/m3 |
Barium (soluble compounds, as Ba) |
1,100 mg Ba/m3 |
50 mg Ba/m3 |
Benzene |
3,000 ppm |
500 ppm |
Benzoyl peroxide |
7,000 mg/m3 |
1,500 mg/m3 |
Benzyl chloride |
10 ppm |
10 ppm [Unch] |
Beryllium compounds (as Be) |
10 mg Be/m3 |
4 mg Be/m3 |
Boron oxide |
N.E. |
2,000 mg/m3 |
Boron trifluoride |
100 ppm |
25 ppm |
Bromine |
10 ppm |
3 ppm |
Bromoform |
Unknown |
850 ppm |
1,3-Butadiene |
20,000 ppm [LEL] |
2,000 ppm [LEL] |
2-Butanone |
3,000 ppm |
3,000 ppm [Unch] |
2-Butoxyethanol |
700 ppm |
700 ppm [Unch] |
n-Butyl acetate |
10,000 ppm |
1,700 ppm [LEL] |
sec-Butyl acetate |
10,000 ppm |
1,700 ppm [LEL] |
tert-Butyl acetate |
10,000 ppm |
1,500 ppm [LEL] |
n-Butyl alcohol |
8,000 ppm |
1,400 ppm [LEL] |
sec-Butyl alcohol |
10,000 ppm |
2,000 ppm |
tert-Butyl alcohol |
8,000 ppm |
1,600 ppm |
n-Butylamine |
2,000 ppm |
300 ppm |
tert-Butyl chromate |
30 mg/m3 (as CrO3) |
15 mg Cr(VI)/m3 |
n-Butyl glycidyl ether |
3,500 ppm |
250 ppm |
n-Butyl mercaptan |
2,500 ppm |
500 ppm |
p-tert-Butyltoluene |
1,000 ppm |
100 ppm |
Cadmium dust (as Cd) |
50 mg Cd/m3 |
9 mg Cd/m3 |
Cadmium fume (as Cd) |
9 mg Cd/m3 |
9 mg Cd/m3[Unc h] |
Calcium arsenate (as As) |
100 mg As/m3 |
5 mg As/m3 |
Calcium oxide |
Unknown |
25 mg/m3 |
Camphor (synthetic) |
200 mg/m3 |
200 mg/m3 [Unch] |
Carbaryl |
600 mg/m3 |
100 mg/m3 |
Carbon black |
N.E. |
1,750 mg/m3 |
Carbon dioxide |
50,000 ppm |
40,000 ppm |
Carbon disulfide |
500 ppm |
500 ppm [Unch] |
Carbon monoxide |
1,500 ppm |
1,200 ppm |
Carbon tetrachloride |
300 ppm |
200 ppm |
Chlordane |
500 mg/m3 |
100 mg/m3 |
Chlorinated camphene |
200 mg/m3 |
200 mg/m3 [Unch] |
Chlorinated diphenyl oxide |
Unknown |
5 mg/m3 |
Chlorine |
30 ppm |
10 ppm |
Chlorine dioxide |
10 ppm |
5 ppm |
Chlorine trifluoride |
20 ppm |
20 ppm [Unch] |
Chloroacetaldehyde |
100 ppm |
45 ppm |
alpha-Chloroacetophenone |
100 mg/m3 |
15 mg/m3 |
Chlorobenzene |
2,400 ppm |
1,000 ppm |
o-Chlorobenzylidene malononitrile |
2 mg/m3 |
2 mg/m3 [Unch] |
Chlorobromomethane |
5,000 ppm |
2,000 ppm |
Chlorodiphenyl (42% chlorine) |
10 mg/m3 |
5 mg/m3 |
Chlorodiphenyl (54% chlorine) |
5 mg/m3 |
5 mg/m3 [Unch] |
Chloroform |
1,000 ppm |
500 ppm |
1-Chloro-1-nitropropane |
2,000 ppm |
100 ppm |
Chloropicrin |
4 ppm |
2 ppm |
beta-Chloroprene |
400 ppm |
300 ppm |
Chromic acid and chromates |
30 mg/m3 (as CrO3) |
15 mg Cr(VI)/m3 |
Chromium (II) compounds [as Cr(II)] |
N.E. |
250 mg Cr(II)/m3 |
Chromium (III) compounds [as Cr(III)] |
N.E. |
25 mg Cr(III)/m3 |
Chromium metal (as Cr) |
N.E. |
250 mg Cr/m3 |
Coal tar pitch volatiles |
700 mg/m3 |
80 mg/m3 |
Cobalt metal, dust and fume (as Co) |
20 mg Co/m3 |
20 mg Co/m3 [Unch] |
Copper (dusts and mists, as Cu) |
N.E. |
100 mg Cu/m3 |
Copper fume (as Cu) |
N.E. |
100 mg Cu/m3 |
Cotton dust (raw) |
N.E. |
100 mg/m3 |
Crag (r) herbicide |
5,000 mg/m3 |
500 mg/m3 |
Cresol (o, m, p isomers) |
250 ppm |
250 ppm [Unch] |
Crotonaldehyde |
400 ppm |
50 ppm |
Cumene |
8,000 ppm |
900 ppm [LEL] |
Cyanides (as CN) |
50 mg/m3 (as CN) |
25 mg/m3 (as CN) |
Cyclohexane |
10,000 ppm |
1,300 ppm [LEL] |
Cyclohexanol |
3,500 ppm |
400 ppm |
Cyclohexanone |
5,000 ppm |
700 ppm |
Cyclohexene |
10,000 ppm |
2,000 ppm |
Cyclopentadiene |
2,000 ppm |
750 ppm |
2,4-D |
500 mg/m3 |
100 mg/m3 |
DDT |
N.E. |
500 mg/m3 |
Decaborane |
100 mg/m3 |
15 mg/m3 |
Demeton |
20 mg/m3 |
10 mg/m3 |
Diacetone alcohol |
2,100 ppm |
1,800 ppm [LEL] |
Diazomethane |
2 ppm |
2 ppm [Unch] |
Diborane |
40 ppm |
15 ppm |
Dibutyl phosphate |
125 ppm |
30 ppm |
Dibutyl phthalate |
9,300 mg/m3 |
4,000 mg/m3 |
o-Dichlorobenzene |
1,000 ppm |
200 ppm |
p-Dichlorobenzene |
1,000 ppm |
150 ppm |
Dichlorodifluoromethane |
50,000 ppm |
15,000 ppm |
1,3-Dichloro 5,5-dimethylhydantoin |
Unknown |
5 mg/m3 |
1,1-Dichloroethane |
4,000 ppm |
3,000 ppm |
1,2-Dichloroethylene |
4,000 ppm |
1,000 ppm |
Dichloroethyl ether |
250 ppm |
100 ppm |
Dichloromonofluoromethane |
50,000 ppm |
5,000 ppm |
1,1-Dichloro 1-nitroethane |
150 ppm |
25 ppm |
Dichlorotetrafluoroethane |
50,000 ppm |
15,000 ppm |
Dichlorvos |
200 mg/m3 |
100 mg/m3 |
Dieldrin |
450 mg/m3 |
50 mg/m3 |
Diethylamine |
2,000 ppm |
200 ppm |
2-Diethylaminoethanol |
500 ppm |
100 ppm |
Difluorodibromomethane |
2,500 ppm |
2,000 ppm |
Diglycidyl ether |
25 ppm |
10 ppm |
Diisobutyl ketone |
2,000 ppm |
500 ppm |
Diisopropylamine |
1,000 ppm |
200 ppm |
Dimethyl acetamide |
400 ppm |
300 ppm |
Dimethylamine |
2,000 ppm |
500 ppm |
N,N-Dimethylaniline |
100 ppm |
100 ppm [Unch] |
Dimethyl 1,2-dibromo 2,2-dichlorethyl phosphate |
1,800 mg/m3 |
200 mg/m3 |
Dimethylformamide |
3,500 ppm |
500 ppm |
1,1-Dimethylhydrazine |
50 ppm |
15 ppm |
Dimethylphthalate |
9,300 mg/m3 |
2,000 mg/m3 |
Dimethyl sulfate |
10 ppm |
7 ppm |
Dinitrobenzene (o, m, p isomers) |
200 mg/m3 |
50 mg/m3 |
Dinitroocresol |
5 mg/m3 |
5 mg/m3 [Unch] |
Dinitrotoluene |
200 mg/m3 |
50 mg/m3 |
Di sec-octyl phthalate |
Unknown |
5,000 mg/m3 |
Dioxane |
2,000 ppm |
500 ppm |
Diphenyl |
300 mg/m3 |
100 mg/m3 |
Dipropylene glycol methyl ether |
Unknown |
600 ppm |
Endrin |
2,000 mg/m3 |
2 mg/m3 |
Epichlorohydrin |
250 ppm |
75 ppm |
EPN |
50 mg/m3 |
5 mg/m3 |
Ethanolamine |
1,000 ppm |
30 ppm |
2-Ethoxyethanol |
6,000 ppm |
500 ppm |
2-Ethoxyethyl acetate |
2,500 ppm |
500 ppm |
Ethyl acetate |
10,000 ppm |
2,000 ppm [LEL] |
Ethyl acrylate |
2,000 ppm |
300 ppm |
Ethyl alcohol |
15,000 ppm |
3,300 ppm [LEL] |
Ethylamine |
4,000 ppm |
600 ppm |
Ethyl benzene |
2,000 ppm |
800 ppm [LEL] |
Ethyl bromide |
3,500 ppm |
2,000 ppm |
Ethyl butyl ketone |
3,000 ppm |
1,000 ppm |
Ethyl chloride |
20,000 ppm |
3,800 ppm [LEL] |
Ethylene chlorohydrin |
10 ppm |
7 ppm |
Ethylenediamine |
2,000 ppm |
1,000 ppm |
Ethylene dibromide |
400 ppm |
100 ppm |
Ethylene dichloride |
1,000 ppm |
50 ppm |
Ethylene glycol dinitrate |
500 mg/m3 |
75 mg/m3 |
Ethyleneimine |
100 ppm |
100 ppm [Unch] |
Ethylene oxide |
800 ppm |
800 ppm [Unch] |
Ethyl ether |
19,000 ppm [LEL] |
1,900 ppm [LEL] |
Ethyl formate |
8,000 ppm |
1,500 ppm |
Ethyl mercaptan |
2,500 ppm |
500 ppm |
N-Ethylmorpholine |
2,000 ppm |
100 ppm |
Ethyl silicate |
1,000 ppm |
700 ppm |
Ferbam |
N.E. |
800 mg/m3 |
Ferrovanadium dust |
N.E. |
500 mg/m3 |
Fluorides (as F) |
500 mg F/m3 |
250 mg F/m3 |
Fluorine |
25 ppm |
25 ppm [Unch] |
Fluorotrichloromethane |
10,000 ppm |
2,000 ppm |
Formaldehyde |
30 ppm |
20 ppm |
Formic acid |
30 ppm |
30 ppm [Unch] |
Furfural |
250 ppm |
100 ppm |
Furfuryl alcohol |
250 ppm |
75 ppm |
Glycidol |
500 ppm |
150 ppm |
Graphite (natural) |
N.E. |
1,250 mg/m3 |
Hafnium compounds (as Hf) |
Unknown |
50 mg Hf/m3 |
Heptachlor |
700 mg/m3 |
35 mg/m3 |
n-Heptane |
5,000 ppm |
750 ppm |
Hexachloroethane |
300 ppm |
300 ppm [Unch] |
Hexachloronaphthalene |
2 mg/m3 |
2 mg/m3 [Unch] |
n-Hexane |
5,000 ppm |
1,100 ppm [LEL] |
2-Hexanone |
5,000 ppm |
1,600 ppm |
Hexone |
3,000 ppm |
500 ppm |
sec Hexyl acetate |
4,000 ppm |
500 ppm |
Hydrazine |
80 ppm |
50 ppm |
Hydrogen bromide |
50 ppm |
30 ppm |
Hydrogen chloride |
100 ppm |
50 ppm |
Hydrogen cyanide |
50 ppm |
50 ppm [Unch] |
Hydrogen fluoride (as F) |
30 ppm |
30 ppm [Unch] |
Hydrogen peroxide |
75 ppm |
75 ppm [Unch] |
Hydrogen selenide (as Se) |
2 ppm |
1 ppm |
Hydrogen sulfide |
300 ppm |
100 ppm |
Hydroquinone |
Unknown |
50 mg/m3 |
Iodine |
10 ppm |
2 ppm |
Iron oxide dust and fume (as Fe) |
N.E. |
2,500 mg Fe/m3 |
Isoamyl acetate |
3,000 ppm |
1,000 ppm |
Isoamyl alcohol (primary and secondary) |
10,000 ppm |
500 ppm |
Isobutyl acetate |
7,500 ppm |
1,300 ppm [LEL] |
Isobutyl alcohol |
8,000 ppm |
1,600 ppm |
Isophorone |
800 ppm |
200 ppm |
Isopropyl acetate |
16,000 ppm |
1,800 ppm |
Isopropyl alcohol |
12,000 ppm |
2,000 ppm [LEL] |
Isopropylamine |
4,000 ppm |
750 ppm |
Isopropyl ether |
10,000 ppm |
1,400 ppm [LEL] |
Isopropyl glycidyl ether |
1,000 ppm |
400 ppm |
Ketene |
Unknown |
5 ppm |
Lead compounds (as Pb) |
700 mg Pb/m3 |
100 mg Pb/m3 |
Lindane |
1,000 mg/m3 |
50 mg/m3 |
Lithium hydride |
55 mg/m3 |
0.5 mg/m3 |
L.P.G. |
19,000 ppm [LEL] |
2,000 ppm [LEL] |
Magnesium oxide fume |
N.E. |
750 mg/m3 |
Malathion |
5,000 mg/m3 |
250 mg/m3 |
Maleic anhydride |
Unknown |
10 mg/m3 |
Manganese compounds (as Mn) |
N.E. |
500 mg Mn/m3 |
Mercury compounds [except (organo) alkyls, as Hg] |
28 mg Hg/m3 |
10 mg Hg/m3 |
Mercury (organo) alkyl compounds(as Hg) |
10 mg Hg/m3 |
2 mg Hg/m3 |
Mesityl oxide |
5,000 ppm |
1,400 ppm [LEL] |
Methoxychlor |
N.E. |
5,000 mg/m3 |
Methyl acetate |
10,000 ppm |
3,100 ppm [LEL] |
Methyl acetylene |
15,000 ppm [LEL] |
1,700 ppm [LEL] |
Methyl acetylenepropadiene mixture |
15,000 ppm |
3,400 ppm [LEL] |
Methyl acrylate |
1,000 ppm |
250 ppm |
Methylal |
15,000 ppm [LEL] |
2,200 ppm [LEL] |
Methyl alcohol |
25,000 ppm |
6,000 ppm |
Methylamine |
100 ppm |
100 ppm [Unch] |
Methyl (namyl) ketone |
4,000 ppm |
800 ppm |
Methyl bromide |
2,000 ppm |
250 ppm |
Methyl Cellosolve (r) |
2,000 ppm |
200 ppm |
Methyl Cellosolve (r) acetate |
4,000 ppm |
200 ppm |
Methyl chloride |
10,000 ppm |
2,000 ppm |
Methyl chloroform |
1,000 ppm |
700 ppm |
Methylcyclohexane |
10,000 ppm |
1,200 ppm [LEL] |
Methylcyclohexanol |
10,000 ppm |
500 ppm |
o-Methylcyclohexanone |
2,500 ppm |
600 ppm |
Methylene bisphenyl isocyanate |
100 mg/m3 |
75 mg/m3 |
Methylene chloride |
5,000 ppm |
2,300 ppm |
Methyl formate |
5,000 ppm |
4,500 ppm |
5-Methyl 3-heptanone |
3,000 ppm |
100 ppm |
Methyl hydrazine |
50 ppm |
20 ppm |
Methyl iodide |
800 ppm |
100 ppm |
Methyl isobutyl carbinol |
2,000 ppm |
400 ppm |
Methyl isocyanate |
20 ppm |
3 ppm |
Methyl mercaptan |
400 ppm |
150 ppm |
Methyl methacrylate |
4,000 ppm |
1,000 ppm |
Methyl styrene |
5,000 ppm |
700 ppm |
Mica |
N.E. |
1,500 mg/m3 |
Molybdenum (insoluble compounds, as Mo) |
N.E. |
5,000 mg Mo/m3 |
Molybdenum (soluble compounds, as Mo) |
N.E. |
1,000 mg Mo/m3 |
Monomethyl aniline |
100 ppm |
100 ppm [Unch] |
Morpholine |
8,000 ppm |
1,400 ppm [LEL] |
Naphtha (coal tar) |
10,000 ppm [LEL] |
1,000 ppm [LEL] |
Naphthalene |
500 ppm |
250 ppm |
Nickel carbonyl (as Ni) |
7 ppm |
2 ppm |
Nickel metal and other compounds (as Ni) |
N.E. |
10 mg Ni/m3 |
Nicotine |
35 mg/m3 |
5 mg/m3 |
Nitric acid |
100 ppm |
25 ppm |
Nitric oxide |
100 ppm |
100 ppm [Unch] |
p-Nitroaniline |
300 mg/m3 |
300 mg/m3 [Unch] |
Nitrobenzene |
200 ppm |
200 ppm [Unch] |
p-Nitrochlorobenzene |
1,000 mg/m3 |
100 mg/m3 |
Nitroethane |
1,000 ppm |
1,000 ppm [Unch] |
Nitrogen dioxide |
50 ppm |
20 ppm |
Nitrogen trifluoride |
2,000 ppm |
1,000 ppm |
Nitroglycerine |
500 mg/m3 |
75 mg/m3 |
Nitromethane |
1,000 ppm |
750 ppm |
1-Nitropropane |
2,300 ppm |
1,000 ppm |
2-Nitropropane |
2,300 ppm |
100 ppm |
Nitrotoluene (o, m, p isomers) |
200 ppm |
200 ppm [Unch] |
Octachloronaphthalene |
Unknown |
Unknown [Unch] |
Octane |
5,000 ppm |
1,000 ppm [LEL] |
Oil mist (mineral) |
N.E. |
2,500 mg/m3 |
Osmium tetroxide (as Os) |
1 mg Os/m3 |
1 mg Os/m3 [Unch] |
Oxalic acid |
500 mg/m3 |
500 mg/m3 [Unch] |
Oxygen difluoride |
0.5 ppm |
0.5 ppm [Unch] |
Ozone |
10 ppm |
5 ppm |
Paraquat |
1.5 mg/m3 |
1 mg/m3 |
Parathion |
20 mg/m3 |
10 mg/m3 |
Pentaborane |
3 ppm |
1 ppm |
Pentachloronaphthalene |
Unknown |
Unknown [Unch] |
Pentachlorophenol |
150 mg/m3 |
2.5 mg/m3 |
n-Pentane |
15,000 ppm [LEL] |
1,500 ppm [LEL] |
2-Pentanone |
5,000 ppm |
1,500 ppm |
Perchloromethyl mercaptan |
10 ppm |
10 ppm [Unch] |
Perchloryl fluoride |
385 ppm |
100 ppm |
Petroleum distillates (naphtha) |
10,000 ppm |
1,100 ppm [LEL] |
Phenol |
250 ppm |
250 ppm [Unch] |
p-Phenylene diamine |
Unknown |
25 mg/m3 |
Phenyl ether (vapor) |
N.E. |
100 ppm |
Phenyl etherbiphenyl mixture (vapor) |
N.E. |
10 ppm |
Phenyl glycidyl ether |
Unknown |
100 ppm |
Phenylhydrazine |
295 ppm |
15 ppm |
Phosdrin |
4 ppm |
4 ppm [Unch] |
Phosgene |
2 ppm |
2 ppm [Unch] |
Phosphine |
200 ppm |
50 ppm |
Phosphoric acid |
10,000 mg/m3 |
1,000 mg/m3 |
Phosphorus (yellow) |
N.E. |
5 mg/m3 |
Phosphorus pentachloride |
200 mg/m3 |
70 mg/m3 |
Phosphorus pentasulfide |
750 mg/m3 |
250 mg/m3 |
Phosphorus trichloride |
50 ppm |
25 ppm |
Phthalic anhydride |
10,000 mg/m3 |
60 mg/m3 |
Picric acid |
100 mg/m3 |
75 mg/m3 |
Pindone |
200 mg/m3 |
100 mg/m3 |
Platinum (soluble salts, as Pt) |
N.E. |
4 mg Pt/m3 |
Portland cement |
N.E. |
5,000 mg/m3 |
Propane |
20,000 ppm [LEL] |
2,100 ppm [LEL] |
n-Propyl acetate |
8,000 ppm |
1,700 ppm |
n-Propyl alcohol |
4,000 ppm |
800 ppm |
Propylene dichloride |
2,000 ppm |
400 ppm |
Propylene imine |
500 ppm |
100 ppm |
Propylene oxide |
2,000 ppm |
400 ppm |
n-Propyl nitrate |
2,000 ppm |
500 ppm |
Pyrethrum |
5,000 mg/m3 |
5,000 mg/m3 [Unch] |
Pyridine |
3,600 ppm |
1,000 ppm |
Quinone |
300 mg/m3 |
100 mg/m3 |
Rhodium (metal fume and insoluble compounds, as
Rh) |
N.E. |
100 mg Rh/m3 |
Rhodium (soluble compounds, as Rh) |
N.E. |
2 mg Rh/m3 |
Ronnel |
5,000 mg/m3 |
300 mg/m3 |
Rotenone |
Unknown |
2,500 mg/m3 |
Selenium compounds (as Se) |
Unknown |
1 mg Se/m3 |
Selenium hexafluoride |
5 ppm |
2 ppm |
Silica, amorphous |
N.E. |
3,000 mg/m3 |
Silica, crystalline (respirable dust) |
N.E. |
|
cristobalite/tridymite: |
|
25 mg/m3 |
quartz/tripoli: |
|
50 mg/m3 |
Silver (metal dust and soluble compounds, as
Ag) |
N.E. |
10 mg Ag/m3 |
Soapstone |
N.E. |
3,000 mg/m3 |
Sodium fluoroacetate |
5 mg/m3 |
2.5 mg/m3 |
Sodium hydroxide |
250 mg/m3 |
10 mg/m3 |
Stibine |
40 ppm |
5 ppm |
Stoddard solvent |
29,500 mg/m3 |
20,000 mg/m3 |
Strychnine |
3 mg/m3 |
3 mg/m3 [Unch] |
Styrene |
5,000 ppm |
700 ppm |
Sulfur dioxide |
100 ppm |
100 ppm [Unch] |
Sulfuric acid |
80 mg/m3 |
15 mg/m3 |
Sulfur monochloride |
10 ppm |
5 ppm |
Sulfur pentafluoride |
1 ppm |
1 ppm [Unch] |
Sulfuryl fluoride |
1,000 ppm |
200 ppm |
2,4,5-T |
Unknown |
250 mg/m3 |
Talc |
N.E. |
1,000 mg/m3 |
Tantalum (metal and oxide dust, as Ta) |
N.E. |
2,500 mg Ta/m3 |
TEDP |
35 mg/m3 |
10 mg/m3 |
Tellurium compounds (as Te) |
N.E. |
25 mg Te/m3 |
Tellurium hexafluoride |
1 ppm |
1 ppm [Unch] |
TEPP |
10 mg/m3 |
5 mg/m3 |
Terphenyl (o, m, p isomers) |
Unknown |
500 mg/m3 |
1,1,1,2-Tetrachloro 2,2-difluoroethane |
15,000 ppm |
2,000 ppm |
1,1,2,2-Tetrachloro 1,2-difluoroethane |
15,000 ppm |
2,000 ppm |
1,1,2,2-Tetrachloroethane |
150 ppm |
100 ppm |
Tetrachloroethylene |
500 ppm |
150 ppm |
Tetrachloronaphthalene |
Unknown |
Unknown [Unch] |
Tetraethyl lead (as Pb) |
40 mg Pb/m3 |
40 mg Pb/m3 [Unch] |
Tetrahydrofuran |
20,000 ppm [LEL] |
2,000 ppm [LEL] |
Tetramethyl lead (as Pb) |
40 mg Pb/m3 |
40 mg Pb/m3 [Unch] |
Tetramethyl succinonitrile |
5 ppm |
5 ppm [Unch] |
Tetranitromethane |
5 ppm |
4 ppm |
Tetryl |
N.E. |
750 mg/m3 |
Thallium (soluble compounds, as Tl) |
20 mg Tl/m3 |
15 mg Tl/m3 |
Thiram |
1,500 mg/m3 |
100 mg/m3 |
Tin (inorganic compounds, as Sn) |
400 mg Sn/m3 |
100 mg Sn/m3 |
Tin (organic compounds, as Sn) |
Unknown |
25 mg Sn/m3 |
Titanium dioxide |
N.E. |
5,000 mg/m3 |
Toluene |
2,000 ppm |
500 ppm |
Toluene 2,4-diisocyanate |
10 ppm |
2.5 ppm |
o-Toluidine |
100 ppm |
50 ppm |
Tributyl phosphate |
125 ppm |
30 ppm |
1,1,2-Trichloroethane |
500 ppm |
100 ppm |
Trichloroethylene |
1,000 ppm |
1,000 ppm [Unch] |
Trichloronaphthalene |
Unknown |
Unknown [Unch] |
1,2,3-Trichloropropane |
1,000 ppm |
100 ppm |
1,1,2-Trichloro 1,2,2-trifluoroethane |
4,500 ppm |
2,000 ppm |
Triethylamine |
1,000 ppm |
200 ppm |
Trifluorobromomethane |
50,000 ppm |
40,000 ppm |
2,4,6-Trinitrotoluene |
1,000 mg/m3 |
500 mg/m3 |
Triorthocresyl phosphate |
40 mg/m3 |
40 mg/m3 [Unch] |
Triphenyl phosphate |
N.E. |
1,000 mg/m3 |
Turpentine |
1,500 ppm |
800 ppm |
Uranium (insoluble compounds, as U) |
30 mg U/m3 |
10 mg U/m3 |
Uranium (soluble compounds, as U) |
20 mg U/m3 |
10 mg U/m3 |
Vanadium dust |
70 mg/m3 (as V2O5) |
35 mg V/m3 |
Vanadium fume |
70 mg/m3 (as V2O5) |
35 mg V/m3 |
Vinyl toluene |
5,000 ppm |
400 ppm |
Warfarin |
350 mg/m3 |
100 mg/m3 |
Xylene (o, m, p isomers) |
1,000 ppm |
900 ppm |
Xylidine |
150 ppm |
50 ppm |
Yttrium compounds (as Y) |
N.E. |
500 mg Y/m3 |
Zinc chloride fume |
4,800 mg/m3 |
50 mg/m3 |
Zinc oxide |
2,500 mg/m3 |
500 mg/m3 |
Zirconium compounds (as Zr) |
500 mg Zr/m3 |
25 mg Zr/m3 |
|
|
|