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Properties of substance:

L-(+)-tartaric acid

Physical appearance:

monoclinic 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):

174

Solubility (g/100 g of solvent):

benzene: insoluble [Ref.]
water: 115 (0°C) [Ref.]
water: 126 (10°C) [Ref.]
water: 139 (20°C) [Ref.]
water: 156 (30°C) [Ref.]
water: 195 (50°C) [Ref.]
water: 343 (100°C) [Ref.]
glycerol: soluble [Ref.]
diethyl ether: 0.313 (20°C) [Ref.]
methanol: 74.5 [Ref.]
propanol: 11.9 [Ref.]
chloroform: insoluble [Ref.]
ethanol: 42.2 [Ref.]

    Dissociation:

    pKa (1) = 3.02 (20°C, water)
    pKa (2) = 4.36 (20°C, water)

    Enthalpy (heat) of solution ΔsolH (kJ)

    13,69 (s) [Ref.]

    LD50 (mg/kg):

    485 (mice, intravenous)

    References:

    1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 8-116
    2. Stahl P.H., Wermuth C.G. Handbook of Pharmaceutical Salts: Properties, Selection, and Use. - Wiley-VCH, 2002. - pp. 308
    3. Свойства органических соединений: Справочник. - Под ред. Потехина А.А. - Л.: Химия, 1984. - pp. 138-139
    4. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1319
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru