hydrogen cyanide

Hydrogen cyanide, also referred to as formonitrile, is a chemical compound with the formula CHN. It has a molecular mass of 27.011 and a canonical SMILES notation of C#N. The substance exhibits a boiling point of 78 and a melting point of -13.4. Its density is 0.000671, and it possesses a refractive index of 1.2675. The vapor pressure is 630, while the dynamic viscosity measures 0.201.

Safety data indicates that hydrogen cyanide has a flash point of -17.8. The lower flammable limit is 5.6, and the upper flammable limit is 40. The immediately dangerous to life or health concentration is 55. Exposure limits include a time-weighted average of 11 and a short-term limit of 5. The compound has a pKa of 9.21 and an ionization energy of 13.6. It features an electric dipole moment of 2.984.

According to PubChem, the compound has a weight of 27.025, an xlogp of 0.1, and a topological polar surface area of 23.8. It contains zero hydrogen bond donors and one hydrogen bond acceptor, with a charge of 0. A PubMed search for hydrogen cyanide yields 37,516 results.