Hydrogen sulfide
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| Hydrogen sulfide | |
|---|---|
 
| |
| General | |
| Systematic name | Hydrogen sulfide |
| Other names | Sulfuretted hydrogen sulfane sulfur hydride sour gas sulfurated hydrogen hydrosulfuric acid sewer gas stink damp rotten egg gas |
| Molecular formula | H2S |
| Molar mass | 34.082 g/mol34.082 amu |
| Appearance | Colorless gas |
| CAS number | 7783-06-4 |
| Properties | |
| Density and phase | 1.363 g/L,gas |
| Solubility in water | 0.25 g/100 mL (40 °C) |
| Melting point | -82.30 °C190.85 K -116.14 °F 343.53 °R |
| Boiling point | -60.28 °C212.87 K -76.504 °F 383.166 °R |
| Acidity (pKa) | 6.89 |
| Structure | |
| Molecular shape | Bent |
| Dipole moment | 0.97 D D |
| Hazards | |
| MSDS | Material Safety Data Sheet |
| NFPA 704 |
4
4
0
|
| Flash point | -82.4 °C190.75 K -116.32 °F 343.35 °R |
| R/S statement | R: R12, R26, R50
(S1/2), S9, S16
|
| Related compounds | |
| Related hydrogen | water; hydrogen selenide; |
| compounds | hydrogen telluride |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Disclaimer and references | |
Hydrogen sulfide is commonly known as sewer gas, stink damp, and rotten egg gas. Its molecular formula is written as H2S. It also appears as colorless gas. Hydrogen sulfide is found in human and natural things. People can contain hydrogen sulfide by their breathing and sometimes it affect people to die. Hydrogen sulfide cause eye irritation, headache, and fatigue.[1]
Contents |
Properties
Hydrogen sulfide's structure looks like structure of water. But they are different in a detail. Because of hydrogen sulfide is not polar and electronegative, hydrogen sulfide has different melting point and boiling point. Hydrogen sulfide boil at -60.7C and melt at -85.5C but water boil at 100.0C.[2]
Occurrences
Hydrogen sulfide is found in natural gas, volcanic gases and hot springs which are crude petroleum. The bacteria which is living in human mouth and gastrointestinal make hydrogen sulfide. The bacteria is separated between vegetable or animal proteins. When industrial activities, such as the food processing, coke ovens, kraft paper mills, tanneries, and petroleum refineries, hydrogen sulfide also occurs. Hydrogen can be fired very easily that is known as hydrosulfuric acid, sewer gas, and stink damp. Hydrogen sulfide also has colorless gas.[3]
Uses
Hydrogen sulfide produces several organosulfur compounds which are methanethiol, ethanethiol, and thioglycolic acid. Sodium hydrosulfide and Sodium sulfide are converted from hydrogen sulfide to alkali hydrosulfides and they are used in the degradation of biopolymers. In analytical chemistry, hydrogen sulfide is very important for many centuries. For sulfuric acid reaction with ferrous sulfide, hydrogen sulfide is made. The reacting of metal ions with hydrogen sulfide correspond metal sulfides.The small amounts of cells which maintain human body make hydrogen sulfide and it has biological functions. They work with a vasodilator and brain. The NMDA receptor response increasingly by their work.[4]
Toxicity
Hydrogen sulfide have several different poison system in the body that it is called a broad-spectrum poison. Hydrogen cyanide is another type of toxicity of hydrogen sulfide. It stops providing oxygen from binding and cellular respiration. Natural hydrogen sulfide in the environment makes enzyme to live in the human body capable of detoxifying.[5] Hydrogen sulfide which is colorless gas smells like rotten eggs. Toxicity of hydrogen sulfide is very rare that is found mainly in industrial things mainly. The doctors in emergency rooms have to know how to manage and present H2S poisoning because it is very important to recover.[6] The inhalation include toxicity of hydrogen sulfide. The H2S poisoning affects the nervous system, and sudden death's cause is H2S high concentrations.[7]
References
- Hydrogen sulfide Atsdr, multiple authors.
- Hydrogen sulfide Mattson edu, multiple authors.
- Hydrogen sulfide Wikipedia, multiple authors.
- Toxicity, Hydrogen Sulfide emedicine, multiple authors.
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