Threshold Limits

[ About us ] [ Contact us ] [ Literature & Tools ] [ ONSITE MONITORING ]	*Threshold Limits*
Specialty Gases and Equipment Your #1 Gas Supplier

(514) 956-7503

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

Matheson Gas Products 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.

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

Substance	TLV TWA	TLV STEL	Substance	TLV TWA	TLV STEL
Acetaldehyde	25C	---	Germane	0.2	---
Acetic acid	10	15	Glutaraldehyde	0.05C	---
Acetone	500	750	Heptane	400	500
Acetonitrile	40	60	Hexane	50	---
Acrolein	0.1C	---	Hydrazine	0.01	---
Acrylonitrile	2	---	Hydrogen bromide	3C	---
Ammonia	25	35	Hydrogen chloride	5C	---
Arsine	0.05	---	Hydrogen cyanide	4.7C	---
Benzene	0.5	2.5	Hydrogen fluoride	3C	---
Boron trifluoride	1C	---	Hydrogen peroxide	1	---
Bromine	0.1	0.2	Hydrogen selenide	0.05	---
1,3-Butadiene	2	---	Hydrogen sulfide	10	15
Butane	800	---	Iodine	0.1C	---
n-Butyl acetate	150	200	Isopropyl alcohol	400	500
n-Butyl acrylate	2	---	Methyl alcohol	200	250
n-Butyl alcohol	50C	---	Methylamine	5	15
Butyl mercaptan	0.5	---	Methyl bromide	1	---
Carbon dioxide	5,000	30000	Methyl chloride	50	100
Carbon disulfide	10	---	Methylene chloride	50	---
Carbon monoxide	25	---	Methyl ethyl ketone	200	300
Carbon tetrachloride	5	10	Methyl mercaptan	0.5	---
Chlorine	0.5	1	Methyl methacrylate	100	---
Chlorine dioxide	0.1	0.3	Naphthalene	10	15
Chlorobenzene	10	---	Nitric acid	2	4
Chloroform	10	---	Nitric oxide	25	---
Chloropicrin	0.1	---	Nitrobenzene	1	---
Cresol	5	---	Nitrogen dioxide	3	5
Cyanogen	10	---	Nitrogen trifluoride	10	---
Cyanogen chloride	0.3C	---	Nitrous oxide	50	---
Cyclohexane	300	---	Octane	300	---
Cyclohexanol	50	---	Ozone	0.05	---
Cyclohexanone	25	---	Pentane	600	750
Diborane	0.1	---	Perchloroethylene	25	100
Dichlorobenzene	10	---	Phenol	5	---
1,1-Dichloroethane	100	---	Phosgene	0.1	---
Dimethylamine	5	15	Phosphine	0.3	1
Dioxane	20	---	Pyridine	5	---
Ethanolamine	3	6	Silane	5	---
Ethyl acetate	400	---	Styrene	20	40
Ethyl acrylate	5	15	Sulfur dioxide	2	5
Ethyl alcohol	1000	---	Sulfur hexafluoride	1000	---
Ethylamine	5	15	Toluene	50	---
Ethyl benzene	100	125	Toluene diisocyanate	0.005	0.02
Ethyl chloride	100	---	1,2,4-Trichlorobenzene	5C	---
Ethylene dichloride	10	---	1,1,2-Trichloroethane	10	---
Ethylene glycol	100 mg/m³C	---	Trichloroethylene	50	100
Ethylene oxide	1	---	Triethylamine	1	3
Ethyl ether	400	500	Trimethylamine	5	15
Ethyl mercaptan	0.5	---	Trimethylbenzene	25	---
Fluorine	1	2	Turpentine	100	---
Formaldehyde	0.3C	---	Vinyl acetate	10	15
Formic acid	5	10	Vinyl bromide	0.5	---
Furfural	2	---	Vinyl chloride	1	---
Gasoline	300	500	Xylenes	100	150