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Properties of substance:

ammonium dihydrogen phosphate

Group of substances:

inorganic

Physical appearance:

colorless tetragonal crystals

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

H6NO4P

Structural formula as text:

NH4H2PO4

Molar/atomic mass: 115.03

Melting point (°C):

190

Decomposition temperature (°C):

250

Solubility (g/100 g of solvent):

acetone: insoluble [Ref.]
water: 22.6 (0°C) [Ref.]
water: 28 (10°C) [Ref.]
water: 35.3 (20°C) [Ref.]
water: 39.5 (25°C) [Ref.]
water: 43.9 (30°C) [Ref.]
water: 57 (40°C) [Ref.]
water: 82.5 (60°C) [Ref.]
water: 118.3 (80°C) [Ref.]
water: 173.2 (100°C) [Ref.]

Properties of solutions:

28,4% (wt.), solvent - water
  Density (g/cm3) = 1.16 (25°)

Density:

1.8 (20°C, g/cm3)

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

-1446 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-1211 (s)

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

152 (s)

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

142 (s)

References:

  1. Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.15
  2. Journal of Physical and Chemical Reference Data. - 1998. - Vol. 27, No. 6. - pp. 1289-1459
  3. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 240
  4. Milne G.W.A. Gardner's Commercially Important Chemicals. - Wiley-Interscience, 2005. - pp. 35
  5. Perry D.L. Handbook of Inorganic Compounds. - 2nd ed. - CRC Press, 2011. - pp. 21
  6. Неорганическая химия. - Под ред. Третьякова Ю.Д., Т.2. - М.: Academa, 2004. - pp. 177 [Russian]
  7. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 54 [Russian]
  8. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 218 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru