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Properties of substance:

isocyanic acid

Group of substances:

inorganic

Physical appearance:

colorless liquid

Empirical formula (Hill's system for organic substances):

CHNO

Structural formula as text:

HNCO

Molar/atomic mass: 43.03

Melting point (°C):

-81--79

Boiling point (°C):

23.5

Properties of solutions:

82,9% (wt.), solvent - water
  Freezing point (°C) = -102.5

Dissociation:

pKa (1) = 3.92 (18°C, water)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

238 (g)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

44.9 (g)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-19
  2. Canadian Journal of Chemistry. - 1955. - Vol. 33, No. 2. - pp. 426-440
  3. Zeitschrift fur Naturforschung B. - 2002. - Vol. 57, No. 1. - pp. 19-24 [DOI: 10.1515/znb-2002-0103 ]
  4. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 525-526 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 370 [Russian]
  6. Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 356-357 [Russian]
  7. Химия псевдогалогенидов. - Под ред. Голуба А.М., Кёлера Х., Скопенко В.В. - Киев: Вища школа, 1981. - pp. 123-124 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru