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Safety and Health Topics: |
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| Hydrogen |
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General Description
Synonyms:
OSHA IMIS Code Number: 1410
Chemical Abstracts Service (CAS) Registry Number: 1333-74-0
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: MW8900000
Chemical Description and Physical Properties: Gas.
Exposure Limits
OSHA Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.55 Appendix A -- Simple asphyxiants. The limiting factor is the available oxygen which shall be at least 19.5 percent and be within the requirements addressing explosion in part 1926.
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- Simple asphyxiants. The limiting factor is the available oxygen which shall be at least 18 percent and be within the requirements addressing explosion in subpart B of part 1915.
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): Simple Asphyxiant
Health Factors
Potential symptoms: Drowsiness, unconsciousness, asphyxia; severe burns and frostbite from contact with liquid.
Health Effects: Asphyxiant (HE17); Explosive (HE18)
Affected organ: CNS
Notes: 1) OSHA does not have a PEL for hydrogen. In confined spaces, oxygen content should be at least 19.5% by volume. 2) Gas/air mixtures are explosive. There is no odor warning.
Date Last Revised: 02/23/2004
Literature Basis:
- International Chemical Safety Cards (WHO/IPCS/ILO): Butane (liquefied gas).
- Pohanish, R.P. (editor): Hydrogen. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1272-1273.
Monitoring Methods used by OSHA
On-Site Sampling Techniques/Methods:
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device: Detector Tube
manufacturer: Dräger
model/type: Hydrogen 0.2%/a, order no. 81 01511
sampling information: 1 stroke
upper measurement limit: 2.0 Vol.-%
detection limit: approximately 0.1 Vol.-%
overall uncertainty: approximately 25%
method reference: on-site air secondary (manufacturer)
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device: Detector Tube
manufacturer: Dräger
model/type: Hydrogen 0.5%/a, order no. CH 30901
sampling information: 5 strokes
upper measurement limit: 3.0 Vol.-%
detection limit: approximately 0.2 Vol.-%
overall uncertainty: approximately 25%
method reference: on-site air secondary (manufacturer)
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device: Detector Tube
manufacturer: Gastec
model/type: 30
sampling information: 1 stroke
upper measurement limit: 2.0%
detection limit: 0.5%
overall uncertainty: unknown
method reference: on-site air secondary (manufacturer)
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device: Detector Tube
manufacturer: Matheson-Kitagawa
model/type: 8014-137U
sampling information: 1 or 2 strokes
upper measurement limit: 0.8%
detection limit: approximately 0.02%
overall uncertainty: unknown
method reference: on-site air secondary (manufacturer)
Wipe sampling: No
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