| 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) |