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Properties of substance:

pentanedioic acid

Synonyms:

glutaric acid

Group of substances:

organic

Physical appearance:

prismatic crystals

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

C5H8O4

Structural formula as text:

HOOC(CH2)3COOH

Molar/atomic mass: 132.115

Melting point (°C):

96

Boiling point (°C):

303

Decomposition temperature (°C):

280-290

Solubility (g/100 g of solvent):

acetone: 34.96 (20°C) [Ref.]
benzene: 0.0163 (25°C) [Ref.]
chloroform: soluble [Ref.]
diethyl ether: very soluble [Ref.]
ethanol: very soluble [Ref.]
ethyl acetate: 8.96 (20°C) [Ref.]
formic acid 95%: 55.62 (18.6°C) [Ref.]
petroleum ether: difficulty soluble [Ref.]
water: 83.3 (14°C) [Ref.]
water: 64 (20°C) [Ref.]

Density:

1.192 (106°C, g/cm3)

Vapour pressure (Torr):

20 (200°C)

Dissociation:

pKa (1) = 4.34 (25°C, water)
pKa (2) = 5.27 (25°C, water)

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

-960 (s)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-28
  2. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 293
  3. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 154-155
  4. Мономеры для поликонденсации. - М.: Мир, 1976. - pp. 36-39 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 222 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 412 [Russian]
  7. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 630-631 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru