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Properties of substance:

dl-methionine

Group of substances:

organic

Physical appearance:

white crystals

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

C5H11NO2S

Structural formula as text:

CH3SCH(CH3)CH(NH2)COOH

CAS No: 59-51-8

Molar/atomic mass: 149.211

Melting point (°C):

281

Solubility (g/100 g of solvent):

acetic acid: 1.66 (18°C) [Ref.]
dimethylsulfoxide: 0.1 (20.3°C) [Ref.]
organic solvents: practically insoluble [Ref.]
water: 1.8 (0°C) [Ref.]
water: 3 (20°C) [Ref.]
water: 17.6 (100°C) [Ref.]

    Dissociation:

    pKBH+ (1) = 2.13 (25°C, water)
    pKa (1) = 9.27 (25°C, water)

    References:

    1. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 311
    2. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 174-175
    3. Беликов В.Г. Учебное пособие по фармацевтической химии. - М.: Медицина, 1979. - pp. 120 [Russian]
    4. Губен И. Методы органической химии. - Т. 4, Вып. 2. - М.-Л.: ГНТИХЛ, 1949. - pp. 911 [Russian]
    5. Краткая химическая энциклопедия. - Т. 3: Мальтаза-Пиролиз. - М.: Советская энциклопедия, 1964. - pp. 202-203 [Russian]
    6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 418 [Russian]
    7. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 794-795 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru