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Properties of substance:

2-methylpropanoic acid

Synonyms:

isobutyric acid

Group of substances:

organic

Physical appearance:

colorless liquid

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

C4H8O2

Structural formula as text:

(CH3)2CHCOOH

Molar/atomic mass: 88.105

Melting point (°C):

-47

Boiling point (°C):

154.4

Solubility (g/100 g of solvent):

ammonia liquid : very easily soluble [Ref.]
chloroform: miscible [Ref.]
diethyl ether: miscible [Ref.]
ethanol: miscible [Ref.]
water: 29.5 (20°C) [Ref.]

Dissociation:

pKa (1) = 4.85 (25°C, water)

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

173 (l)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-26, 8-110
  2. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 250-257
  3. Маркман А.Л. Химия липидов. - Вып. 1: Жирные кислоты. - Ташкент: Издательство АН Узбекской ССР, 1963. - pp. 134 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 400 [Russian]
  5. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 684-685 [Russian]
  6. Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 88 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru