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Properties of substance:

citraconic acid

Synonyms:

cis-2-methyl-2-butenedioic acid

Group of substances:

organic

Physical appearance:

monoclinic crystals

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

C5H6O4

Structural formula as text:

HOOCC(CH3)=CHCOOH

Molar/atomic mass: 130.11

Melting point (°C):

91

Solubility (g/100 g of solvent):

benzene: insoluble [Ref.]
carbon disulphide: insoluble [Ref.]
chloroform: sparingly soluble [Ref.]
cis-1,2-dichloroethene: 0.69 (40°C) [Ref.]
diethyl ether: sparingly soluble [Ref.]
ligroin: insoluble [Ref.]
trans-1,2-dichloroethene: 0.047 (40°C) [Ref.]
water: 78.3 (25°C) [Ref.]

Dissociation:

pKa (1) = 2.29 (25°C, water)
pKa (2) = 6.15 (25°C, water)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 3-364
  2. Dictionary of organic compounds. - vol.1, Abietic acid - Dypnone. - London, 1946. - pp. 555
  3. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 291
  4. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 147
  5. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 1110-1111 [Russian]
  6. Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 97 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru