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Properties of substance:

guanine




skc-file

Physical appearance:

colorless crystals

Empirical formula (Hill's system):

C5H5N5O

CAS No: 73-40-5

Molar/atomic mass: 151.126

Melting point (°C):

360

Destruction point (°C):

360

Solubility (g/100 g of solvent):

water: 0.004 (40°C) [Ref.]
diethyl ether: insoluble [Ref.]
ethanol: very slightly soluble [Ref.]

    Dissociation:

    pKBH+ (1) = 3.2 (25°C, water)
    pKa (1) = 9.3 (25°C, water)
    pKa (2) = 12.5 (25°C, water)

    Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

    -183.9 (s)

    References:

    1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 3-270
    2. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 144
    3. Досон Р., Эллиот Д., Эллиот У., Джонс К. Справочник биохимика. - М.: Мир, 1991. - pp. 77, 91
    4. Химическая энциклопедия. - Т.4. - М.: Советская энциклопедия, 1995. - pp. 142-143
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru