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Properties of substance:

1,2,3-benzenetricarboxylic acid

Synonyms:

hemimellitic acid

Group of substances:

organic

Physical appearance:

colorless crystals

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

C9H6O6

Structural formula as text:

C6H3(COOH)3

Molar/atomic mass: 210.15

Melting point (°C):

197

Solubility (g/100 g of solvent):

diethyl ether: very soluble [Ref.]
ethanol: very soluble [Ref.]
water: 2.45 (10°C) [Ref.]
water: 3.06 (19°C) [Ref.]
water: 5.02 (25°C) [Ref.]
water: 21.1 (50°C) [Ref.]

Dissociation:

pKa (1) = 2.8 (25°C, water)
pKa (2) = 4.2 (25°C, water)
pKa (3) = 5.87 (25°C, water)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 3-36
  2. Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 549
  3. Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 269 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru