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Properties of substance:

pyruvic acid

Group of substances:

organic

Physical appearance:

colorless liquid

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

C3H4O3

Structural formula as text:

CH3COCOOH

Molar/atomic mass: 88.06

Melting point (°C):

13.6

Boiling point (°C):

165

Decomposition temperature (°C):

165

CAS №: 127-17-3

Solubility (g/100 g of solvent):

acetone: soluble [Ref.]
diethyl ether: miscible [Ref.]
ethanol: miscible [Ref.]
water: miscible [Ref.]

Density:

1.267 (20°C, g/cm3)

Reactions of synthesis:

  1. Yeild 50-55%. [Ref.1, Ref.2aster]
    HOOCCH(OH)CH(OH)COOH → CH3COCOOH + CO2 + H2O
  2. [Ref.1]
    CH2=CHCOOH + HN3 + H2O → CH3COCOOH + NH3 + N2

Refractive index (nD):

1.428 (20°C)

Vapour pressure (Torr):

10 (65°C)
25 (80°C)

Dissociation:

pKa (1) = 2.39 (25°C, water)

References:

  1. Dictionary of Food Compounds with CD-ROM. - 2nd ed. - CRC Press, 2013. - pp. 1665
  2. Dictionary of organic compounds. - Vol. 3, naphthacarbazole - zygadenine. - М.: ИИЛ, 1949. - pp. 564
  3. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 166
  4. The Merck Index 11th ed., Merck & Company, 1989. - pp. 1275
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 173 [Russian]
  6. Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 110 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru