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Properties of substance:

dl-tartatic acid

Physical appearance:

colorless crystals

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

C4H6O6

Structural formula as text:

HOOCCH(OH)CH(OH)COOH

Molar/atomic mass: 150.09

Melting point (°C):

205

Solubility (g/100 g of solvent):

water: 17.08 (20°C) [Ref.]
water: 40.33 (60°C) [Ref.]
water: 65 (100°C) [Ref.]

    Dissociation:

    pKa (1) = 3.03 (25°C, water)
    pKa (2) = 4.37 (25°C, water)

    References:

    1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 8-116
    2. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 233-237
    3. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 102
    4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 138
    5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 395
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru