Health Effects
Irritating to eyes and respiratory tract. Highly toxic, broad spectrum, affecting the nervous system in particular, high concentrations cause almost immediate death, but very low concentrations can be tolerated indefinitely.
RTECS Description: Reproductive Effector
Carcinogenicity: IARC/NTC: Not listed as carcinogenic.
Exposure Limits:
ACGIH: TLV Ceiling 4.7 ppm (skin)
NIOSH REL Ceiling 10 ppm, ceiling 15 ppm for 10 minute exposure
IDLH 100 ppm
OSHA: PEL Ceiling 20 ppm, 50 ppm peak once per 8 hrs
Steri-Trac® H2S Monitor
Availability: Special Order
Specifications:*
Sensor Type Electrochemical
Range: 0 – 30 ppm
Resolution: 0.2 ppm
Temp Range: -20 to +40 oC
Response time (t50): <50 s (2 min exposure)
Properties and Applications:
Hydrogen sulfide has a characteristic rotten egg smell, and is often formed as a result of the anaerobic breakdown of sulfites, e.g. in swamps and is commonly found in volcanic areas and as a contaminant in crude petroleum. It finds application in analytical chemistry.
Physical Properties:
Chemical Formula: H2S
Physical form: Colorless gas
MP: -82.3 oC
BP: -60.3 oC
pKa 7.05
Odor Threshold: 0.13 ppm
LEL 4.3 %
MW: 34.1 g/mol
Rel. Gas Density: 1.2 (Air = 1)
Classification Numbers:
CAS No.: 7783-06-4
EC No.: 231-977-3
RTECS: MX1225000
*Specifications subject to change
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