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℃)
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)
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 H280 Contains gas under pressure; may explode if heated Gases under pressure Compressed gas Liquefied gas Dissolved gas Warning P410+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:	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. P410+P403 Protect from sunlight. Store in a well-ventilated place.