Hydrogen Sulfide (H2S)

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.

*Specifications subject to change