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Properties of substance:

sodium metabisulfite

Group of substances:

inorganic

Physical appearance:

white crystals

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

Na2O5S2

Structural formula as text:

Na2S2O5

Molar/atomic mass: 190.1

Decomposition temperature (°C):

150

Solubility (g/100 g of solvent):

ethanol: slightly soluble [Ref.]
glycerol: soluble [Ref.]
sulfur dioxide: 0.026 (0°C) [Ref.]
water: 45.14 (0°C) [Ref.]
water: 65.3 (20°C) [Ref.]
water: 88.7 (80°C) [Ref.]
water: 91.9 (85°C) [Ref.]
water: 96.3 (97.2°C) [Ref.]

Density:

1.48 (20°C, g/cm3)

    LD50 (mg/kg):

    115 (rats, intravenous)

    References:

    1. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 12ed., Vol. 1-5. - Wiley, 2012. - pp. 4022
    2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1299-1300
    3. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 330 [Russian]
    4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 126 [Russian]
    5. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 140-141 [Russian]
    6. Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 464 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru