Hangzhou Hongyu Chemical Co., Ltd.
Hydrogen sulfide is an inorganic compound with a chemical formula of H2S and a molecular weight of 34.076. It is a flammable acid gas under standard conditions. It is colorless and has the smell of rotten eggs at low concentrations. highly toxic.
The aqueous solution is hydrosulfuric acid, which is weaker than carbonic acid but stronger than boric acid. Soluble in water, easily soluble in alcohols, petroleum solvents and crude oil.
Hydrogen sulfide is a flammable and hazardous chemical, which can form an explosive mixture when mixed with air, and can cause combustion and explosion when exposed to open flames and high heat. Hydrogen sulfide is an important chemical raw material.
Hydrogen sulfide info:
| Names | |
|---|---|
| English name
Hydrogen sulfide
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Other names
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| Identifiers | |
| ChemSpider | |
| EC Number |
|
| 303 | |
| KEGG | |
| MeSH | Hydrogen+sulfide |
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PubChem CID
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| RTECS number |
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| UNII | |
| UN number | 1053 |
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CompTox Dashboard (EPA)
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| Properties | |
| H2S | |
| Molar mass | 34.08 g·mol−1 |
| Appearance | Colorless gas |
| Odor | Foul, pungent, like that of rotten eggs |
| Density | 1.539 g.L−1 (0°C)[2] |
| Melting point | −85.5[3] °C (−121.9 °F; 187.7 K) |
| Boiling point | −59.55[3] °C (−75.19 °F; 213.60 K) |
| 3.980 g dm−3 (at 20 °C) [4] | |
| Vapor pressure | 1740 kPa (at 21 °C) |
| Acidity (pKa) | 7.0[5][6] |
| Conjugate acid | Sulfonium |
| Conjugate base | Bisulfide |
| −25.5·10−6 cm3/mol | |
|
Refractive index (nD)
|
1.000644 (0 °C)[2] |
| Structure | |
| C2v | |
| Bent | |
| 0.97 D | |
| Thermochemistry | |
|
Heat capacity (C)
|
1.003 J K−1 g−1 |
|
Std molar
entropy (S⦵298) |
206 J mol−1 K−1 |
|
Std enthalpy of
formation (ΔfH⦵298) |
−21 kJ mol−1 |
