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7783-06-4

Name HYDROGEN SULFIDE
CAS 7783-06-4
EINECS(EC#) 231-977-3
Molecular Formula H2S
MDL Number MFCD00011444
Molecular Weight 34.08
MOL File 7783-06-4.mol

Chemical Properties

Appearance colourless gas with strong odour of rotten eggs (odour threshold ca 0.2 ppt)
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
Fp  -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
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.
explosive limit 6%
Odor Threshold 0.00041ppm
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℃)
CAS DataBase Reference 7783-06-4(CAS DataBase Reference)
EPA Substance Registry System Hydrogen sulfide (7783-06-4)

Safety Data

Hazard Codes  F+,T+,N
Risk Statements 
R12:Extremely Flammable.
R26:Very Toxic by inhalation.
R50:Very Toxic to aquatic organisms.
Safety Statements 
S9:Keep container in a well-ventilated place .
S16:Keep away from sources of ignition-No smoking .
S36:Wear suitable protective clothing .
S38:In case of insufficient ventilation, wear suitable respiratory equipment .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
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

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