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Properties of substance:

uric acid



skc-file

Group of substances:

organic

Physical appearance:

colorless crystals

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

C5H4N4O3

Molar/atomic mass: 168.12

Decomposition temperature (°C):

400

Solubility (g/100 g of solvent):

diethyl ether: slightly soluble [Ref.]
ethanol abs.: 0.68 (20°C) [Ref.]
formic acid 95%: 0.04 (20°C) [Ref.]
glycerol: soluble [Ref.]
pyridine: 0.21 (20°C) [Ref.]
quinoline: 1.13 (20°C) [Ref.]
water: 0.00313 (25°C) [Ref.]
water: 0.00645 (37°C) [Ref.]
water: 0.0834 (100°C) [Ref.]

Numerical data:

Year of discovery: 1776


Density:

1.893 (20°C, g/cm3)

Dissociation:

pKa (1) = 3.89 (25°C, water)

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

-618.8 (s)

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

173.2 (s)

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

166.1 (s)

References:

  1. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 282-286
  2. The Merck Index 11th ed., Merck & Company, 1989. - pp. 1554
  3. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 138-139
  4. Досон Р., Эллиот Д., Эллиот У., Джонс К. Справочник биохимика. - М.: Мир, 1991. - pp. 77 [Russian]
  5. Краткая химическая энциклопедия. - Т. 3: Мальтаза-Пиролиз. - М.: Советская энциклопедия, 1964. - pp. 327-328 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 411 [Russian]
  7. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1110, 1364 [Russian]
  8. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 800-801 [Russian]
  9. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 144 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru