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hydrogen cyanide; hydrocyanic acid

CAS 74-90-8 · CHN

Hazard class

Danger — Toxic, Environmental hazard

Pictograms

ToxicEnvironmental hazard

H-statements

H330 Fatal if inhaled
H310 Fatal in contact with skin
H300 Fatal if swallowed
H400 Very toxic to aquatic life
H410 Very toxic to aquatic life with long lasting effects

Common uses (US EPA CDR)

Intermediate

Workplace exposure limits

NIOSH REL ST 4.7 ppm (5 mg/m3) [skin]
OSHA PEL TWA 10 ppm (11 mg/m3) [skin]
IDLH 50 ppm

Occupational exposure limits — NIOSH Pocket Guide.

Synonyms

hydrogen cyanide · hydrocyanic acid · Formonitrile · Prussic acid · Blausaeure · Cyanwasserstoff · Formic anammonide · Cyclon

Molecular weight

27.025 g/mol

Browse similar

Toxic · Environmental hazard

Data source

Harmonised classification ECHA — EU CLP Annex VI

Legally binding EU classification adopted by ECHA under CLP Annex VI — the highest-confidence GHS source.

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GHS/CLP classification from authoritative registries (ECHA Annex VI, PubChem). SNRL is a free chemical safety search. Browse categories · API · Console

Guide only. This information is compiled from published safety data sheets and public regulatory registries and is believed correct at the date of publication shown. It is not all-inclusive and shall be used only as a guide. It does not replace the manufacturer’s current Safety Data Sheet, which governs in all cases. SNRL shall not be held liable for any injury, loss or damage resulting from handling of, or contact with, any product listed.