Science Fair Project Encyclopedia
Arsine
|
General |
|
|---|---|
| Name | Arsenic trihydride |
| Chemical formula | AsH3 |
| Appearance | Colourless gas |
|
Physical |
|
| Formula weight | 78.0 amu |
| Melting point | 157 K (-116 °C) |
| Boiling point | 210 K (-63 °C) |
| Density | 1.7 ×103 kg/m3 (liquid) |
| Solubility | 0.07 g in 100g water |
|
Thermochemistry |
|
| ΔfH0gas | 66 kJ/mol |
| ΔfH0liquid | 64 kJ/mol |
| ΔfH0solid | ? kJ/mol |
| S0gas, 1 bar | 223 J/mol·K |
|
Safety | |
| Ingestion | Extremely toxic, deadly. Headache is an early symptom. |
| Inhalation | Deadly. Smells like garlic. |
| Skin | Contact should be avoided. |
| Eyes | Contact should be avoided. |
| More info | Hazardous Chemical Database |
|
SI units were used where possible. Unless otherwise stated, standard conditions were used. | |
Arsine (AsH3) is a flammable and highly toxic gaseous chemical compound of arsenic and hydrogen. Synonyms include arseniuretted hydrogen, arsenous hydride, arsenic trihydride, and hydrogen arsenide. Some organic compounds based on arsine, such as lewisite, adamsite , Clark I and Clark II , have been developed for chemical warfare.
Arsine is also used in the semiconductor industry for depositing arsenic.
Exposure to arsine leads to massive intravascular hemolysis and renal failure. It has a high mortality rate.
Arsine was formed temporarily, and then decomposed, in the old (but extremely sensitive) Marsh test for the presence of arsenic.
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