Hydrogen cyanide

• Formula: CHN
• Molecular weight: 27.0253
• IUPAC Standard InChI: InChI=1S/CHN/c1-2/h1H Copy

  
• IUPAC Standard InChIKey: LELOWRISYMNNSU-UHFFFAOYSA-N Copy
• CAS Registry Number: 74-90-8
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Hydrocyanic acid; AC; Blausaeure (German); Carbon hydride nitride (CHN); Formic anammonide; Formonitrile; HCN; Prussic Acid; Cyclon; Acide cyanhydrique; Acido cianidrico; Aero Liquid HCN; Blausaeure; Blauwzuur; Cyaanwaterstof; Cyanwasserstoff; Cyclone B; Cyjanowodor; Evercyn; NA 1051; Prussic acid, unstabilized; Rcra waste number P063; UN 1051; Zaclondiscoids; Carbon hydride nitride; Zootic acid; Agent AC; Nitrilomethane
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• Information on this page:
  • Normal melting point
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 92
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
  • Gas Phase Kinetics Database
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Normal melting point

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cole, 1955
Cole, R.H., On the Dielectric Constant of Liquid Hydrogen Cyanide., J. Am. Chem. Soc., 1955, 77, 2012. [all data]

Coates and Davies, 1950
Coates, J.E.; Davies, R.H., Hydrogen Cyanide. XVIII. Some Physical Properties of Anhydrous Hydrogen Cyanide., J. Chem. Soc., 1950, 1950, 1194. [all data]

Coates and Coates, 1944
Coates, G.E.; Coates, J.E., HCN. XIII. The Dielectric Constant of Anhydrous HCN., J. Chem. Soc., 1944, 1944, 77. [all data]

Giauque and Ruehrwein, 1939
Giauque, W.F.; Ruehrwein, R.A., The Entropy of Hydrogen Cyanide. Heat Capacity, Heat of Vaporization and Vapor Pressure. Hydrogen Bond Polymerization of the Gas in Chains of Indefinite Length., J. Am. Chem. Soc., 1939, 61, 2626. [all data]

Cobb and Walton, 1937
Cobb, A.W.; Walton, J.H., The Reaction of Hydrogen Cyanide With Sulfuric and Phosphoric Acids., J. Phys. Chem., 1937, 41, 351. [all data]

Coates and Taylor, 1936
Coates, J.E.; Taylor, E.G., Hydrogen Cyanide. VIII. Conductivity of Electrolytes in Anhydrous Hydrogen Cyanide. Some Uni-univalent Salts at 18 degrees., J. Chem. Soc., 1936, 1936, 1245. [all data]

Smyth and McNeight, 1936
Smyth, C.P.; McNeight, S.A., Molecular Rotation in Solid Arsine and Other Hydrides., J. Am. Chem. Soc., 1936, 58, 1723. [all data]

Lewis and Schutz, 1934
Lewis, G.N.; Schutz, P.W., The Vapor Pressure of Liquid and Solid Deutocyanic Acid., J. Am. Chem. Soc., 1934, 56, 1002. [all data]

Carlisle, 1933
Carlisle, P.J., Manufacture, Handling and Use of Hydrocyanic Acid., Ind. Eng. Chem., 1933, 25, 959. [all data]

Buchanan, 1932
Buchanan, G.H., Chim. Ind. (Paris), 1932, 28, 1024. [all data]

Lowry and Henderson, 1932
Lowry, T.M.; Henderson, S.T., Molecular Structure and Physical Properties of Prussic Acid. I. Refractive Dispersion of Prussic Acid and Its Homologs., Proc. R. Soc. London, A, 1932, 136, 471. [all data]

Coates and Hartshorne, 1931
Coates, J.E.; Hartshorne, N.H., Studies on Hydrogen Cyanide. III. The Freezing Points of Hydrogen Cyanide-Water Mixtures., J. Chem. Soc., 1931, 1931, 657. [all data]

Lespieau, 1919
Lespieau, R., C. R. Hebd. Seances Acad. Sci., 1919, 169, 31. [all data]

Tammann, 1899
Tammann, G., Z. Phys. Chem., Stoechiom. Verwandtschaftsl., 1899, 29, 51. [all data]

Notes

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• Symbols used in this document:
  

  Tfus	Fusion (melting) point

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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