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Properties of substance:

urea phosphate



skc-file

Group of substances:

organic

Physical appearance:

colorless rhombic crystals

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

CH7N2O5P

Structural formula as text:

HN2CONH2 * H3PO4

Molar/atomic mass: 158.05

Melting point (°C):

117.5

Decomposition temperature (°C):

117

Solubility (g/100 g of solvent):

acetone: practically insoluble [Ref.]
benzine: practically insoluble [Ref.]
carbon disulphide: practically insoluble [Ref.]
chloroform: practically insoluble [Ref.]
diethyl ether: very slightly soluble [Ref.]
ethanol: 11.6 (18°C) [Ref.]
ethanol: 39 (46°C) [Ref.]
methanol: 43.3 (18°C) [Ref.]
methanol: 112.3 (46°C) [Ref.]
water: 71.7 (10°C) [Ref.]
water: 91.9 (18°C) [Ref.]
water: 135 (32°C) [Ref.]
water: 202 (46°C) [Ref.]

Properties of solutions:

44% (wt.), solvent - water
  Density (g/cm3) = 1.2 (13°)
47,9% (wt.), solvent - water
  Density (g/cm3) = 1.24 (18°)

Density:

1.7645 (10°C, g/cm3)
1.759 (21°C, g/cm3)

Standard molar enthalpy (heat) of formation ΔfH (298 K, kJ/mol)

-1638.77 (s) [Ref.]

Enthalpy (heat) of solution ΔsolH (kJ)

-31 (s) [Ref.]

References:

  1. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 63
  2. Зотов А.Т. Мочевина. - М.: ГНТИХЛ, 1963. - pp. 48-49 [Russian]
  3. Исследования по химии и технологии удобрений, пестицидов и солей. - М.: Наука, 1966. - pp. 112 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 376 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1133, 1159 [Russian]
  6. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 242 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru