Hydrogen cyanideHydrogen cyanide (also called prussic acid) is a chemical compound with the formula HCN and structural formula H\sC\tN. It is a highly toxic and flammable liquid that boils slightly above room temperature, at 25.6 °C. Read from the Chembox of the Wikipedia article Hydrogen cyanide, revision 1380006624.

Property

Value

Formula

CHN, 27.03 g/mol

Melting point

-13.29 °C

Boiling point

26 °C

Density

0.6876 g/cm³

Flash point

-17.8 °C

pKa

9.21

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