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Hydrogen Sulfide Structure

Hydrogen Sulfide

Chemical Properties

Melting point −85 °C(lit.)
Boiling point −60 °C(lit.)
Density  dgas 1.19 (air = 1.00)
vapor density  1.19 (15 °C, vs air)
vapor pressure  252 psi ( 21 °C)
FEMA  3779 | HYDROGEN SULFIDE
Flash point -17℃
storage temp.  2-8°C
solubility  soluble in H2O
form  colorless gas
pka 7(at 25℃)
color  colorless gas; flammable
Odor Strong rotten egg odor detectable at 0.001 to 0.1 ppm (mean = 0.0094 ppm); olfactory fatigue occurs quickly at high concentrations
Odor Threshold 0.00041ppm
explosive limit 6%
Water Solubility  1g dissolves in H2O: 187mL (10°C), 242mL (20°C), 314 (30°C) [MER06]
Merck  13,4823
BRN  3535004
Dielectric constant 9.3(-84℃)
Stability Stable. Highly flammable. May form explosive mixture with air. Note wide explosive limits. Incompatible with strong oxidizing agents, many metals. May react violently with metal oxides, copper, fluorine, sodium, ethanal.
CAS DataBase Reference 7783-06-4(CAS DataBase Reference)
Substances Added to Food (formerly EAFUS) HYDROGEN SULFIDE
EWG's Food Scores 5
FDA UNII YY9FVM7NSN
EPA Substance Registry System Hydrogen sulfide (7783-06-4)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H220-H280-H330-H400
Precautionary statements P260-P271-P273-P284-P304+P340+P310-P410+P403
Hazard Codes  F+,T+,N,F
Risk Statements  12-26-50-40-36/37-19-11
Safety Statements  9-16-36-38-45-61-28-26
RIDADR  UN 1053 2.3
WGK Germany  2
RTECS  MX1225000
Autoignition Temperature 260 °C
DOT Classification 2.3, Hazard Zone B (Gas poisonous by inhalation)
HazardClass  2.3
Hazardous Substances Data 7783-06-4(Hazardous Substances Data)
Toxicity LC50 in mice, rats (ppm): 634, 712 (1 hr inhalation) (Vernot); LC50 in rats (ppm): 444 (4 hr inhalation) (Tansy)
IDLA 100 ppm
NFPA 704:
4
4 0

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