CHN
27.025 g/mol
Industrial ChemicalDanger
Hydrogen cyanide
CAS74-90-8EC200-821-6
Category
Industrial Chemical
Compound Class
Other
Primary Use
chemical intermediate and fumigant
Hydrogen cyanide is an industrial chemical used primarily as a chemical intermediate and fumigant. It is known to cause male reproductive toxicity according to the Environmental Protection Agency (EPA).
Chemical intermediate in production of other chemicalsInsecticide for fumigating enclosed spaces
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Controlled substances
Substances on this list are tightly controlled under chemical-weapons or precursor regulations. ChemAbout does not facilitate their procurement; this page is a compliance reference only.
Relevant lists:CWC Schedule 3
CAS 74-90-8
Related Compounds
Safety Reference
Danger
H224Extremely flammable liquid and vapour
H330Fatal if inhaled
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
H300Fatal if swallowed
H310Fatal in contact with skin
H372Causes damage to organs through prolonged or repeated exposure
H319Causes serious eye irritation
H370Causes damage to organs
Customs Tariff Classification
The international HS code for Hydrogen cyanide (CAS 74-90-8) is 2811.12.
HS code (international, 6-digit)
2811.12
EU CN code (8-digit)
2811 12 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
formonitrile
InChIKey
LELOWRISYMNNSU-UHFFFAOYSA-N
SMILES
C#N
Synonyms (56)
- HCN
- AC (CHEMICAL WARFARE AGENT)
- AC [Cyanide]
- Acid, Hydrocyanic
- Acide cyanhydrique
- Acide cyanhydrique [French]
- Acido cianidrico
- Acido cianidrico [Italian]
- Aero Liquid HCN
- Agent AC
- Blausaeure
- Blausaeure [German]
- Blauwzuur
- Blauwzuur [Dutch]
- Carbon hydride nitride
- Carbon hydride nitride (CHN)
- Cyaanwaterstof
- Cyaanwaterstof [Dutch]
- Cyanide, Hydrogen
- Cyanwasserstoff
- Cyanwasserstoff [German]
- Cyclon
- Cyclone B
- Cyjanowodor
- Cyjanowodor [Polish]
- Evercyn
- Formic anammonide
- Formonitrile
- Graphitic Carbon Nitride
- HYDROCYANICUM ACIDUM
- Nitrilomethane #
- Prussic acid
- Prussic acid, unstabilized
- Zaclondiscoids
- Zootic acid
- Zyklon B
- [CHN]
- hydridonitridocarbon
- hydrocyanic acid
- hydrogen cyanide
- hydrogen(nitridocarbonate)
- methanenitrile