Hydrogen cyanide

formonitrile, hydrocyanic acid, prussic acid

How to detect Hydrogen cyanide

Formula: HCN | CAS: 74-90-8

Synonyms: formonitrile, hydrocyanic acid, prussic acid

Specification

Specification Value/Information
Formula HCN
CAS no. 74-90-8
Gas Response Factor, 11.7 eV ZR
Gas Response Factor, 10.6 eV ZR
Gas Response Factor, 10.0 eV ZR
ppm per mg/m⁻³, (20 °C, 1 bar) 0.89
Molecular Weight, g/mole 27.0
Melting point, °C -13.4
Boiling point, °C 26
Flash point, °C -17.8
Upper Explosive Limit, % 40
Specification Value/Information
Lower Explosive Limit, % 5.6
Density, g.cm⁻³ 0.69
Ionisation Energy, eV 13.6
EH40 STEL, ppm 10
EH40 STEL, mg.m⁻³ 11
NIOSH ST, ppm 4.7
NIOSH ST, mg.m⁻³ 5
NIOSH IDLH, ppm 50
OSHA TWA PEL, ppm 10
OSHA TWA PEL, mg.m⁻³ 11

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