Encyclopedia > HCN    Article Content  Hydrogen cyanide
Redirected from HCN  Name Hydrogen cyanide Chemical formula HCN
Appearance Colourless liquid Formula weight 27.0 amu Melting
point 260 K (-13 °C) Boiling point 299 K (26 °C) Density 0.7
×103 kg/m3 Solubility very soluble ΔfH0gas 135.14 kJ/mol
ΔfH0liquid 109 kJ/mol ΔfH0solid 100 kJ/mol S0gas, 1 bar 201.82
J/mol·K S0liquid, 1 bar 113.01 J/mol·K S0solid ? J/mol·K
Ingestion Extremely toxic. Early symptoms include nausea,
vomiting and abdominal pain. Inhalation Extremely dangerous.
Early symptoms include slow breathing rate, irritation. Skin
Poisoning is thought to be possible through the skin. Eyes
Dilated pupils are a symptom of poisoning. More info Hazardous
Chemical Database
(http://ull.chemistry.uakron.edu/erd/chemicals/7/6581)
Disclaimer and references  Hydrogen cyanide (HCN), also known as
formonitrile, is a colorless, volatile, and extremely poisonous
chemical compound whose vapors have a bitter almond odor. It is
produced in large quantities all ov