Agent Name

Hydrogen

CAS Number

1333-74-0

Formula

H2

Major Category

Toxic Gases & Vapors

Synonyms

H; Hydrogen; Hydrogen atoms; Molecular hydrogen; Protium; [ChemIDplus] UN1049; UN1966;

Category

Simple Asphyxiants

Description

Colorless gas; [HSDB] Vapor density = 0.069 (lighter than air); [HSDB]

Sources/Uses

Used in welding (oxy-hydrogen and autogenous), petroleum refining, and as a coolant; Used to hydrogenate oils and other organic compounds and to reduce metal oxides; [Merck Index]

Comments

Simple asphyxiant; Contact with evaporating liquid can cause frostbite; [HSDB]

Exposure Assessment
Explanatory Notes

"Appendix F: Minimal Oxygen Content." A simple asphyxiant and explosion hazard; [TLVs and BEIs]

Flammability (NFPA)

4: Burns readily

Adverse Effects
Other Poison

Simple Asphyxiant

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: