Chemical Properties of Hydrogen cyanide (CAS 74-90-8)

Hydrogen cyanide

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InChI
InChI=1S/CHN/c1-2/h1H
InChI Key
LELOWRISYMNNSU-UHFFFAOYSA-N
Formula
CHN
SMILES
C#N
Molecular Weight1
27.03
CAS
74-90-8
Other Names
  • AC
  • Acide cyanhydrique
  • Acido cianidrico
  • Aero Liquid HCN
  • Agent AC
  • Blausaeure
  • Blausaeure (German)
  • Blauwzuur
  • Carbon hydride nitride
  • Carbon hydride nitride (CHN)
  • Cyaanwaterstof
  • Cyanwasserstoff
  • Cyclon
  • Cyclone B
  • Cyjanowodor
  • Evercyn
  • Formic anammonide
  • Formonitrile
  • HCN
  • Hydrocyanic acid
  • NA 1051
  • Nitrilomethane
  • Prussic Acid
  • Prussic acid, unstabilized
  • Rcra waste number P063
  • UN 1051
  • Zaclondiscoids
  • Zootic acid
Sources

Physical Properties

Property Value Unit Source
PAff 712.90 kJ/mol NIST
BasG 681.60 kJ/mol NIST
EA 0.00 eV NIST
EA 1.00 eV NIST
Δf 143.10 kJ/mol Joback Calculated Property
Δfgas 156.72 kJ/mol Joback Calculated Property
Δfus 1.53 kJ/mol Joback Calculated Property
Δvap 28.15 kJ/mol Joback Calculated Property
IE [13.59; 13.73] eV Show Hide
IE 13.60 ± 0.01 eV NIST
IE 13.71 eV NIST
IE 13.59 ± 0.01 eV NIST
IE 13.60 ± 0.01 eV NIST
IE 13.73 ± 0.09 eV NIST
IE 13.70 ± 0.10 eV NIST
IE 13.61 eV NIST
IE 13.61 ± 0.00 eV NIST
IE 13.60 eV NIST
IE 13.61 ± 0.01 eV NIST
logPoct/wat 0.14 Crippen Calculated Property
Pc 5678.82 kPa Joback Calculated Property
liquid 113.01 J/mol×K NIST
Tboil [298.80; 299.70] K Show Hide
Tboil 298.90 ± 0.50 K NIST
Tboil 298.90 ± 0.40 K NIST
Tboil 299.00 ± 0.40 K NIST
Tboil 299.00 ± 1.50 K NIST
Tboil 298.90 ± 0.50 K NIST
Tboil 299.08 ± 0.40 K NIST
Tboil 298.90 ± 0.50 K NIST
Tboil 298.80 ± 0.50 K NIST
Tboil 298.90 ± 0.30 K NIST
Tboil 298.90 ± 0.40 K NIST
Tboil 299.50 ± 1.00 K NIST
Tboil 298.90 ± 1.00 K NIST
Tboil Outlier 299.70 ± 0.50 K NIST
Tboil 298.90 ± 0.50 K NIST
Tboil 299.40 ± 0.60 K NIST
Tc 514.23 K Joback Calculated Property
Tfus [258.29; 286.50] K Show Hide
Tfus 259.85 ± 0.20 K NIST
Tfus 259.90 ± 0.10 K NIST
Tfus 259.88 ± 0.10 K NIST
Tfus 259.86 ± 0.05 K NIST
Tfus 258.30 ± 1.00 K NIST
Tfus Outlier 286.50 ± 0.20 K NIST
Tfus 259.20 ± 0.50 K NIST
Tfus 259.00 ± 1.50 K NIST
Tfus 258.29 ± 1.00 K NIST
Tfus 259.75 ± 0.30 K NIST
Tfus 259.80 ± 0.20 K NIST
Tfus 259.85 ± 0.30 K NIST
Tfus 259.81 ± 0.50 K NIST
Tfus 259.75 ± 0.50 K NIST
Ttriple 259.86 ± 0.02 K NIST
Vc 0.11 m3/kg-mol Joback Calculated Property

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
Cp,gas 24.62 J/mol×K 323.66 Joback Calculated Property
Cp,liquid 71.00 J/mol×K 300.0 NIST
ΔfusH 8.41 kJ/mol 259.9 NIST
ΔsubH 37.60 kJ/mol 228.0 NIST
ΔsubH 35.60 kJ/mol 247.5 NIST
ΔvapH [25.22; 28.10] kJ/mol [276.50; 377.50] Show Hide
Plot of Enthalpy of vaporization at a given temperature.
ΔvapH 28.00 kJ/mol 276.5 NIST
ΔvapH 28.10 kJ/mol 279.0 NIST
ΔvapH 27.80 kJ/mol 282.5 NIST
ΔvapH 28.10 kJ/mol 286.0 NIST
ΔvapH 27.20 kJ/mol 287.5 NIST
ΔvapH 28.10 kJ/mol 288.0 NIST
ΔvapH 25.22 kJ/mol 298.85 NIST
ΔvapH 27.80 kJ/mol 377.5 NIST
ΔfusS 32.34 J/mol×K 259.9 NIST
ΔvapS 84.38 J/mol×K 298.85 NIST

Molecular Descriptors

Joback and Reid Groups
-CN 1

Similar Compounds

Copper cyanide. Cyano radical. Cyanide anion. Aluminum monofluoride. Amidogen, methanetetraylbis-. Cyanogen chloride. Isocyano silane. Cyanomethylene. Cyanogen iodide. Acetonitrile. Ammonium thiocyanate. Cyanogen bromide. Methylidyne, cyano-. Potassium thiocyanate. Cyanomethyl radical.

Find more compounds similar to Hydrogen cyanide.

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Outlier This icon means that the value is more than 2 standard deviations away from the property mean.