Hydrogen sulfideProperties of hydrogen sulfide is described below PHYSICAL STATE; APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS , WITH CHARACTERISTIC ODOUR OF ROTTEN EGGS.
PHYSICAL DANGERS:
The gas is heavier than air and may travel along the ground; distant ignition possible. As a result of flow, agitation, etc., electrostatic charges can be generated.
CHEMICAL DANGERS:
Heating may cause violent combustion or explosion. The substance decomposes on burning producing toxic gases (sulfur oxides). Reacts violently with strong oxidants, causing fire and explosion hazard. Attacks many metals and some plastics.
OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 ppm as TWA; 15 ppm as STEL; (ACGIH 2004).
MAC: 10 ppm, 14 mg/m³;
Peak limitation category: II(2); Pregnancy risk group: IIc;
(DFG 2004).
OSHA PEL: C 20 ppm 50 ppm 10-minute maximum peak
NIOSH REL: C 10 ppm (15 mg/m3) 10-minute
NIOSH IDLH: 100 ppm ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.
INHALATION RISK:
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.
EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes and the respiratory tract . The substance may cause effects on the central nervous system . Exposure may result in unconsciousness. Exposure may result in death. Inhalation of gas may cause lung oedema (see Notes). The effects may be delayed. Medical observation is indicated. Rapid evaporation of the liquid may cause frostbite.
EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Click here for help with converting units For more information see website:
http://www.cdc.gov/niosh/ipcsneng/neng0165.html
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