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Chemical Sampling Information |
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| Hydrogen Sulfide |
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General Description
Synonyms: Sulfuretted hydrogen; Hydrosulfuric acid; Hepatic gas; H2S
OSHA IMIS Code Number: 1480
Chemical Abstracts Service (CAS) Registry Number: 7783-06-4
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: MX1225000
Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1053 117
NIOSH Pocket Guide to Chemical Hazards, Hydrogen Sulfide: chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1000 Z-2 Table -- 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 Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.55 Appendix A -- 10 ppm, 15 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 10 ppm, 15 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 ppm, 14 mg/m3 TWA; 15 ppm, 21 mg/m3 STEL
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 ppm, 15 mg/m3 Ceiling (10 Minutes)
Health Factors
NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 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
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
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sampling media: Special sampling tube containing an uncoated glass fiber filter, followed by a Na2CO3 coated glass fiber filter, followed by two beds of AgNO3 coated silica gel (200/200 mg)
maximum volume: 12 Liters maximum flow rate: 0.05 L/min TWA
maximum volume: 7.5 Liters maximum flow rate: 0.5 L/min Ceiling
maximum volume: 5 Liters maximum flow rate: 0.5 L/min Peak
current analytical method: Ion Chromatography; IC/Cond
method reference: OSHA Analytical Method (OSHA 1008)
method classification: Fully Validated
note: The sampling pump must be capable of maintaining a constant flow of 0.5 L/min with a back pressure of approximately 20 inches of water.
note: OSHA personnel can obtain samplers from SLTC.
On-Site Sampling Techniques/Methods:
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device: Detector Tube
manufacturer: Dräger
model/type: Hydrogen Sulphide 1/d, order no. 81 01831
sampling information: 1/10 strokes
upper measurement limit: 200 ppm
detection limit: approximately 0.5 ppm
overall uncertainty: approximately 25%
method reference: on-site air secondary (SEI Certified)
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device: Detector Tube
manufacturer: Gastec
model/type: 4LL
sampling information: 0.5 to 10 strokes
upper measurement limit: 120 ppm
detection limit: 0.1 ppm
overall uncertainty: 8% for 2.5 to 60 ppm
method reference: on-site air secondary (SEI Certified)
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device: Detector Tube
manufacturer: Matheson-Kitagawa
model/type: 8014-120SD
sampling information: 0.5/1 strokes
upper measurement limit: 60 ppm
detection limit: approximately 0.5 ppm
overall uncertainty: unknown
method reference: on-site air secondary (SEI Certified)
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