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Properties of substance:

hexanoic acid

Synonyms:

caproic acid
hexoic acid

Group of substances:

organic

Physical appearance:

colorless oily liquid

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

C6H12O2

Structural formula as text:

CH3(CH2)4COOH

Molar/atomic mass: 116.158

Melting point (°C):

-3.4

Boiling point (°C):

202-205

CAS №: 142-62-1

Solubility (g/100 g of solvent):

diethyl ether: soluble [Ref.]
ethanol: soluble [Ref.]
water: 0.864 (0°C) [Ref.]
water: 0.968 (20°C) [Ref.]
water: 1.019 (30°C) [Ref.]
water: 1.095 (45°C) [Ref.]
water: 1.171 (60°C) [Ref.]

Density:

0.929 (20°C, d4)

Dissociation:

pKa (1) = 4.86 (25°C, water)

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

-584 (s)

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

259.04 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

15.2

Heat of combustion (kJ/mol):

3517.9

References:

  1. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 438-440
  2. Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 305
  3. Маркман А.Л. Химия липидов. - Вып. 1: Жирные кислоты. - Ташкент: Издательство АН Узбекской ССР, 1963. - pp. 16 [Russian]
  4. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 712-713 [Russian]
  5. Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 312 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru