Compound: hydrogen cyanide
SMILES: N#[C]
InChIKey: JEVCWSUVFOYBFI-UHFFFAOYSA-N
Synonyms: hydrogen cyanide, hydrocyanic acid, Formonitrile, Prussic acid, Blausaeure, Cyanwasserstoff, Formic anammonide, Cyclon, Evercyn, 74-90-8, Zyklon B, Zaclondiscoids, Cyclone B, Aero Liquid HCN, Agent AC, Cyaanwaterstof, Blauwzuur, Cyjanowodor, Acido cianidrico, Acide cyanhydrique, methanenitrile, RCRA waste number P063, Carbon hydride nitride (CHN), Acid, Hydrocyanic, hydridonitridocarbon, hydrogen(nitridocarbonate), EPA Pesticide Chemical Code 045801, 2WTB3V159F, DTXSID9024148, HYDROCYANICUM ACIDUM, CHEBI:18407, Cyanide, Hydrogen, RefChem:6445, DTXCID004148, hydridonitridocarbon;hydrogen(nitridocarbonate);methanenitrile, 200-821-6, Graphitic Carbon Nitride, Hydrogen cyanide [ISO], Blausaeure [German], 143334-20-7, HCN, [CHN], UN 1051, CHEMBL183419, Blausaeure (German), Blauwzuur [Dutch], Cyjanowodor [Polish], Caswell No. 483, Cyaanwaterstof [Dutch], Cyanwasserstoff [German], Acido cianidrico [Italian], Acide cyanhydrique [French], AC [Cyanide], HSDB 165, Acide cyanhydrique [ISO-French], EINECS 200-821-6, NA1613, UN1051, UN1613, UN1614, UN3294, RCRA waste no. P063, AI3-31100-X, BRN 1718793, UNII-2WTB3V159F, Zootic acid, Nitrilomethane #, Prussic acid, anhydrous, stabilized, Carbon hydride nitride, Hydrocyanic acid, anhydrous, stabilized, Hydrogen cyanide, anhydrous, stabilized, Prussic acid, unstabilized, SCHEMBL244, SCHEMBL495, EC 200-821-6, CHN, UN 1613 (Salt/Mix), UN 1614 (Salt/Mix), HYDROGEN CYANIDE [MI], Hydrocyanic acid (prussic), unstabilized [Forbidden], orb2939396, SCHEMBL8907657, HYDROGEN CYANIDE [HSDB], HYDROGEN CYANIDE [WHO-DD], HYDROCYANICUM ACIDUM [HPUS], AC (CHEMICAL WARFARE AGENT), BDBM50152968, Hydrocyanic acid, anhydrous, stabilized, absorbed in a porous inert material, Hydrogen cyanide, anhydrous, stabilized, absorbed in a porous inert material, Prussic acid, anhydrous, stabilized, absorbed in a porous inert material, NA 1051, Hydrocyanic acid (prussic), unstabilized, CS-0621744, Hydrogen cyanide, stabilized with <3% water, NS00077168, C01326, Q3416481, Graphitic carbon nitride, 99%, length: 1 - 10 mum, hydridonitridocarbonhydrogen(nitridocarbonate)methanenitrile, Hydrogen cyanide, stabilized with <3% water [UN1051]  [Poison], Hydrogen cyanide, stabilized, with <3% water and absorbed in a porous inert material, Hydrogen cyanide, stabilized, with <3% water and absorbed in a porous inert material [UN1614]  [Poison]
Theoretical properties:
molecular_formula: CHN
molecular_weight: 27.025 g/mol
exact_mass: 27.010899036 g/mol
formal_charge: 0
hydrogen_bond_donor_count: 0
hydrogen_bond_acceptor_count: 1
rotatable_bond_count: 0
heavy_atom_count: 2
topological_polar_surface_area: 23.8 Å²
isotope_atom_count: 0
covalently_bonded_unit_count: 1
Physical properties:
physical_state: Colorless gas or liquid
color: Colorless gas or liquid
odor: Bitter almond odor
boiling_point: 78 °F at 760 mmHg (96%) (NIOSH, 2024)
melting_point: 7 °F (96%) (NIOSH, 2024)
density: 0.69 (NIOSH, 2024) - Less dense than water; will float
solubility: Miscible (NIOSH, 2024)
flash_point: 0 °F (96%) (NIOSH, 2024)
vapor_pressure: 630 mmHg (NIOSH, 2024)
Descriptions:
pubchem: Hydrogen cyanide (HCN) and cyanide salts (CN salts) can cause male reproductive toxicity according to The Environmental Protection Agency (EPA).
wikipedia: Hydrogen cyanide (also called prussic acid) is a chemical compound with the formula HCN and structural formula H−C≡N. It is a highly toxic and flammable liquid that boils slightly above room temperature, at 25.6 °C (78.1 °F). HCN is produced on an industrial scale and is a highly valued precursor to many chemical compounds ranging from polymers to pharmaceuticals. Large-scale applications are for the production of potassium cyanide and adiponitrile, used in mining and plastics, respectively. It is more toxic than solid cyanide compounds due to its volatile nature. A solution of hydrogen cyanide in water, represented as HCN(aq), is called hydrocyanic acid. The salts of the cyanide anion are known as cyanides.
Whether hydrogen cyanide is an organic compound or not is a topic of debate among chemists. It is traditionally considered inorganic, but can also be considered a nitrile, giving rise to its alternative names of methanenitrile and formonitrile.