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Hydrogen Sulfide

General Description

Synonyms:  Sulfuretted hydrogen; Hydrosulfuric acid; Hepatic gas; H2S

OSHA IMIS code: 1480

CAS number(s): 7783-06-4

Exposure Limits and Health Factors

Standard Set By Exposure Limit
OSHA PEL - General Industry
See 29 CFR 1910.1000 Table Z-2
Exposures shall not exceed 20 ppm (ceiling) with the following exception: if no other measurable exposure occurs during the 8-hour work shift, exposures may exceed 20 ppm, but not more than 50 ppm (peak), for a single time period up to 10 minutes. 
OSHA PEL - Construction Industry
See 29 CFR 1926.55 Appendix A
10 ppm (15 mg/m3) TWA
OSHA PEL - Shipyard Employment
See 29 CFR 1915.1000 Table Z-Shipyards
10 ppm (15 mg/m3) TWA
NIOSH REL 10 ppm (15 mg/m3) Ceiling (10 Minutes)
ACGIH TLV® (2009) 1 ppm (1.4 mg/m3) TWA
5 ppm (7 mg/m3) STEL
CAL/OSHA PELs 10 ppm (14 mg/m3) TWA
15 ppm (21 mg/m3) STEL
50 ppm Ceiling

NIOSH IDLH concentration: 100 ppm

Potential symptoms: Apnea; coma; convulsions; irritated eyes, conjunctivitis pain, lacrimation, photophobia, corneal vesiculation; respiratory system irritation; dizziness; headaches; fatigue; insomnia; GI disturbances

Health effects: Acute systemic toxicity (HE4); CNS effects (HE7) Irritation-Eye, (Conjunctivitis), Lungs---Moderate (HE15)

Affected organs: Respiratory system, eyes

Chemical Sampling Information

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