Hydrogen cyanide

• Catalog No.: Hydrogen_cyanide
• CAS Number: 74-90-8
• M. F.: CHN
• M. W.: 27.02534

SYNONYMS

• IUPAC name: formonitrile
• IUPAC Traditional name: cyclon
• Synonyms: Formic anammonide; Zyklon B; Hydrocyanic acid; Prussic acid

DATABASE IDS

• Unique Ingredient Identifier: 2WTB3V159F
• MeSH Name: Hydrogen+Cyanide
• Wikipedia Title: Hydrogen_cyanide
• CHEBI ID: 18407
• Chemspider ID: 748
• PubChem CID: 768
• EC Number: 200-821-6
• KEGG ID: C01326
• CAS Number: 74-90-8

PROPERTIES

• pKa: 9.21
• Apperance: Very pale, blue, transparent liquid
• Auto Ignition Point: 538 °C
• pKb: 4.79
• Boiling Point: 25.35 - 26.35°C (298.5 - 299.5 K)
• Std enthalpy of combustion: 642 kJ mol^-1
• Std enthalpy of formation: -4.999 MJ kg^-1
• Density: 0.687 g mL^-1
• Flash Point: -17.8 °C
• Heat Capacity: 71.00 kJ K^-1 mol^-1 (at 27 °C)
• Henry Constant: 75 μmol Pa^-1 kg^-1
• Melting Point: -14.15 - -12.15°C (259 - 261 K)
• Std molar entropy: 113.01 J K^-1 mol^-1
• Odor: Oil of bitter almond
• Refractive Index: 1.2675
• Solubility: Miscible in water
• Solubility: Miscible in ethanol
• Viscosity: 201 μPa s
• EU Index: 006-006-00-X
• European Hazard Symbols: Highly flammable (F+)
• European Hazard Symbols: Highly toxic (T+)
• European Hazard Symbols: Nature polluting (N)
• NFPA704:
  

  4

  4

  1
• Risk Statements: R12, R26/27/28, R50/53
• RTECS: MW6825000
• Safety Statements: S1/2, S16, S36/37, S38, S45, S53, S59, S61
• UN Number: 1051