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Properties of substance:

allantoin

Group of substances:

organic

Physical appearance:

colorless monoclinic crystals

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

C4H6N4O3

Molar/atomic mass: 158.12

Melting point (°C):

235

Solubility (g/100 g of solvent):

diethyl ether: insoluble [Ref.]
ethanol: 0.2 (20°C) [Ref.]
water: 0.5223 (20°C) [Ref.]
water: 3.3 (100°C) [Ref.]

    Dissociation:

    pKa (1) = 8.96 (25°C, water)

    References:

    1. Milne G.W.A. Gardner's Commercially Important Chemicals. - Wiley-Interscience, 2005. - pp. 18
    2. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 93
    3. Досон Р., Эллиот Д., Эллиот У., Джонс К. Справочник биохимика. - М.: Мир, 1991. - pp. 13 [Russian]
    4. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 410-411 [Russian]
    5. Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 85 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru