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
PH :pKa1= 6.90, pKa2 = 13.48(25℃)
Flame Color :Blue
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]
Specific Heat Capacity :Cp(gas): 1 J/(g·K), at 25℃
Merck :13,4823
BRN :3535004
Henry's Law Constant :1.0×10^-3 mol/(m³Pa) at 25℃, Burkholder et al. (2019)
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.
InChI :1S/H2S/h1H2
InChIKey :RWSOTUBLDIXVET-UHFFFAOYSA-N
SMILES :S
CAS DataBase Reference :7783-06-4(CAS DataBase Reference)
EPA Substance Registry System :Hydrogen sulfide (7783-06-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H220 Extremely flammable gas Flammable gases Category 1 Danger P210, P377, P381, P403 H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501 H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P284 Wear respiratory protection. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P310 Immediately call a POISON CENTER or doctor/physician. P377 Leaking gas fire: Do not extinguish, unless leak can be stopped safely. P381 Eliminate all ignition sources if safe to do so. P391 Collect spillage. Hazardous to the aquatic environment P403 Store in a well-ventilated place. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P410+P403 Protect from sunlight. Store in a well-ventilated place. P501 Dispose of contents/container to..…