Reference Information
442
Threshold Limit Values (TLV) and Immediately
Dangerous to Life and Health (IDLH) values
Reference Information
Matheson Tri-Gas assumes no responsibility for the accuracy of the
information listed. As TLV and IDLH values may change, the current Substance
guidelines from the following sources should be consulted for
Fluorine
up-to-date accuracy.
Formaldehyde
Sources: TLV-TWA and TLV-STEL data extracted from the 2005 Threshold Limit
Values & Biological Exposure Indices, copyright 2005 by the American Conference of Formic Acid
Furfural
Governmental Industrial Hygienists (ACGIH). IDLH values extracted from the
NIOSH Pocket Guide to Chemical Hazards, 2004 published by the National Institute Gasoline
for Occupational Safety and Health (NIOSH).
Germanium tetrahydride
Note: All concentrations in parts per million (ppm) unless otherwise noted.
Glutaraldehyde
“C” indicates Ceiling Limit.
Heptane
TLV
TLV
n-Hexane
Substance
TWA
STEL
IDLH
Hydrazine
Acetaldehyde
25C
2,000
Hydrogen Bromide
Acetic Acid
10
15
50
Hydrogen Chloride
Acetone
500
750
2,500
Hydrogen Cyanide
Acetonitirle
20
500
Hydrogen Fluoride
0.1C
2
Acrolein
Hydrogen Peroxide
Acrylonitrile
2
85
Hydrogen Selenide
Ammonia
25
35
300
Hydrogen Sulfide
Arsine
0.05
3
Iodine
Benzene
0.5
2.5
500
Isopropyl Alcohol
Boron Trifluoride
1C
25
Methyl Alcohol
Bromine
0.1
0.2
3
Methylamine
1,3 – Butadiene
2
2,000
Methyl Bromide
Butane
1,000
Methyl Chloride
n-Butyl Acetate
150
200
1,700
Methylene Chloride
n-Butyl Acrylate
2
Methyl Ethyl Ketone
n-Butyl Alcohol
20
1,400
Methyl Mercaptan
Butyl Mercaptan
0.5
500
Methyl Methacrylate
Carbon Dioxide
5,000
30,000
40,000
Naphthalene
Carbon Disulfide
10
500
Nitric Acid
Carbon Monoxide
25
1,200
Nitric Oxide
Carbon Tetrachloride
5
10
200
Nitrobenzene
Chlorine
0.5
1
10
Nitrogen Dioxide
Chlorine Dioxide
0.1
0.3
5
Nitrogen Trifluoride
Chlorobenzene
10
1,000
Nitrous Oxide
Chloroform
10
50
Octane
Chloropicrin
0.1
2
Ozone
5
250
Cresol
Pentane
Cyanogen
10
Perchloroethylene
Cyanogen Chloride
0.3C
Phenol
Cyclohexane
100
1,300
Phosgene
Cyclohexanol
50
400
Phosphine
Cyclohexanone
20
50
700
Pyridine
Diborane
0.1
15
Silane
150
10
p-Dichlorobenzene
Styrene
1,1, - Dichloroethane
100
3,000
Sulfur Dioxide
15
500
5
Dimethylamine
Sulfur Hexafluoride
Dioxane
20
500
Toluene
Ethanolamine
3
6
30
Toluene Diisocyanate
Ethyl Acetate
400
2,000
1,2,4 – Trichlorobenzene
Ethyl Acrylate
5
15
300
1,1,2 - Trichloroethane
Ethyl Alcohol
1,000
3,300
Trichloroethylene
Ethylamine
5
15
600
Triethylamine
800
125
100
Ethyl Benzene
Trimethylamine
Ethyl Chloride
100
3,800
Trimethylbenzene
50
10
Ethylene Dichloride
Turpentine
Ethylene Glycol
- 100 mg/m3C
Vinyl Acetate
Ethylene Oxide
1
800
Vinyl Bromide
Ethyl Ether
400
500
1,900
Vinyl Chloride
Ethyl Mercaptan
0.5
500
Xylenes
www.mathesontrigas.com
TLV
TWA
1
5
2
300
0.2
400
50
0.01
0.5
1
0.05
10
200
200
5
1
50
50
200
0.5
50
10
2
25
1
3
10
50
300
0.05
600
25
5
0.1
0.3
1
5
20
2
1,000
50
0.005
10
50
1
5
25
20
10
0.5
1
100
TLV
STEL
2
0.3C
10
500
0.05C
500
2C
2C
4.7C
2C
15
0.1C
400
250
15
100
300
100
15
4
5
100
1
40
5
0.02
5C
100
3
15
15
150
IDLH
25
20
30
100
750
1,100
50
30
50
50
30
75
1
100
2
2,000
6,000
100
250
2,000
2,300
3,000
150
1,000
250
25
100
200
20
1,000
1,000
5
1,500
150
250
2
50
1,000
700
100
500
2.5
100
1,000
200
800
900