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Threshold Limit Values (TLV) Immediately Dangerous to Life and Health (IDLH)

Hycegas assumes no responsibility for the accuracy of the information listed. As TLV and IDLH values change frequently, the current regulations from the following sources should be consulted for up-to-date accuracy.

Sources: TLV-TWA and TLV-STEL data extracted from 2001 Threshold Limit Valuesand Biological Exposure Indices.

Notes: All concentrations in parts per million. "C"indicates Ceiling Limit.

Substance TLV
TWA
TLV
STEL
Acetaldehyde 25C -
Acetic Acid 10 15
Acetone 500 750
Acetonitrile 40 60
Acrolein 0.1C -
Acrylonitrile 2 -
Ammonia 25 35
Arsine 0.05 -
Benzene 0.5 2.5
Boron Trifluoride 1C ĘC
Bromine 0.1 0.2
1,3-Butadiene 2 -
Butane 800 ĘC
n-Butyl Acetate 150 200
n-Butyl Acrylate 2 -
n-Butyl Alcohol 50C ĘC
Butyl Mercaptan 0.5 ĘC
Carbon Dioxide 5,000 30000
Carbon Disulfid e 10 ĘC
Carbon Monoxide 25 ĘC
Carbon Tetrachloride 5 10
Chlorine 0.5 1
Chlorine Dioxide 0.1 0.3
Chlorobenzene 10 -
Chloroform 10 -
Chloropicrin 0.1 -
Cresol 5 ĘC
Cyanogen 10 -
Cyanogen Chloride 0.3C -
Cyclohexane 300 -
Cyclohexanol 50 -
Cyclohexanone 25 -
Diborane 0.1 -
Dichlorobenzene 10 -
1,1-Dichloroethane 100 -
Dimethylamine 5 15
Dioxane 20 -
Ethanolamine 3 6
Ethyl Acetate 400 -
Ethyl Acrylate 5 15
Ethyl Alcohol 1000 -
Ethylamine 5 15
Ethyl Benzene 100 125
Ethyl Chloride 100 -
Ethylene Dichloride 10 -
Ethylene Glycol 100 mg/m3C -
Ethylene Oxide 1 -
Ethyl Ether 400 500
Ethyl Mercaptan 0.5 -
Fluorine 1 2
Formaldehyde 0.3C -
Formic Acid 5 10
Furfural 2 -
Gasoline 300 500
Germane 0.2 -
Glutaraldehyde 0.05C -
Heptane 400 500
Hexane 50 -
Hydrazine 0.01 -
Hydrogen Bromide 3C -
Hydrogen Chloride 5C -
Hydrogen Cyanide 4.7C -
Hydrogen Fluoride 3C -
Hydrogen Peroxide 1 -
Hydrogen Selenide 0.05 -
Hydrogen Sulfide 10 15
Iodine 0.1C -
Isopropyl Alcohol 400 500
Methyl Alcohol 200 250
Methylamine 5 15
Methyl Bromide 1 -
Methyl Chloride 50 100
Methylene Chloride 50 -
Methyl Ethyl Ketone 200 300
Methyl Mercaptan 0.5 -
Methyl Methacrylate 50 100
Naphthalene 10 15
Nitric Acid 2 4
Nitric Oxide 25 -
Nitrobenzene 1 -
Nitrogen Dioxide 3 5
Nitrogen Trifluoride 10 -
Nitrous Oxide 50 -
Octane 300 -
Ozone 0.05 -
Pentane 600 750
Perchloroethylene 25 100
Phenol 5 -
Phosgene 0.1 -
Phosphine 0.3 1
Pyridine 5 -
Silane 5 -
Styrene 20 40
Sulfur Dioxide 2 5
Sulfur Hexafluoride 1000 -
Toluene 50 -
Toluene Diisocyanate 0.005 0.02
1,2,4-Trichlorobenzene 5C -
1,1,2-Trichloroethane 10 -
Trichloroethylene 50 100
Triethylamine 1 3
Trimethylamine 5 15
Trimethylbenzene 25 -
Turpentine 100 -
Vinyl Acetate 10 15
Vinyl Bromide 0.5 -
Vinyl Chloride 1 -
Xylenes 100 150
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Threshold Limit Values
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