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Properties of substance:

metaphosphoric acid

Group of substances:

inorganic

Physical appearance:

colorless amorphous substance

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

HO3P

Structural formula as text:

HPO3

Molar/atomic mass: 79.98

Melting point (°C):

40

Solubility (g/100 g of solvent):

carbon dioxide liquid: insoluble [Ref.]
ethanol: soluble [Ref.]
water: soluble with reaction [Ref.]

Hygroscopic:

very hygroscopic

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-949.3 (s)

References:

  1. Лидин Р.А., Андреева Л.Л., Молочко В.А. Константы неорганических веществ. - М.: Дрофа, 2006. - pp. 151 [Russian]
  2. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 450 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 109 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru