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Properties of substance:

arsenic gray

Group of substances:

inorganic

Physical appearance:

hexagonal metal

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

As

Structural formula as text:

As

Molar/atomic mass: 74.92

Sublimation point (°C):

615

Solubility (g/100 g of solvent):

ammonia liquid : insoluble [Ref.]
diethyl ether: insoluble [Ref.]
ethanol: insoluble [Ref.]
mercury: 0.0000001 (20°C) [Ref.]
methylene iodide: insoluble [Ref.]
water: insoluble [Ref.]

Numerical data:

Hardness on the Mohs’ scale: 3.5

Density:

5.72 (20°C, g/cm3)
5.24 (817°C, g/cm3)

Vapour pressure (Torr):

0.1 (317°C)
1 (371°C)
10 (437°C)
100 (519°C)

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

    0 (s)

    Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

    0 (s)

    Standard molar entropy S0 (298.15 K, J/(mol·K)):

    36.6 (s)

    Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

    24.7 (s)

    Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

    22

    Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

    32

    LD50 (mg/kg):

    763 (rats, oral)
    144 (mice, oral)
    1000 (mice, intraperitoneal)

    References:

    1. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 297
    2. Вредные химические вещества: Неорганические соединения элементов V-VIII групп. Справочник. - Л., 1989. - pp. 82-102 [Russian]
    3. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 513, 516 [Russian]
    4. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
    5. Немодрук А.А. Аналитическая химия мышьяка. - М.: Наука, 1976. - pp. 7-13 [Russian]
    6. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 82 [Russian]
    7. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 156-157 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru