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Properties of substance:

hydroxylamine



skc-file

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

H3NO

Structural formula as text:

NH2OH

Molar/atomic mass: 33.0298

Melting point (°C):

32

Decomposition temperature (°C):

100

Solubility (g/100 g of solvent):

acetone: soluble [Ref.]
benzene: sparingly soluble [Ref.]
carbon disulphide: sparingly soluble [Ref.]
chloroform: sparingly soluble [Ref.]
diethyl ether: 1.2 (35.6°C) [Ref.]
ethanol abs.: 17.65 (15°C) [Ref.]
ethyl acetate: 1.6 (77.15°C) [Ref.]
methanol: 53.85 (5°C) [Ref.]
water: miscible [Ref.]

Density:

1.216 (10°C, g/cm3)
1.204 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1aster, Ref.2aster]
    NH2OH * HCl + CH3CH2CH2CH2ONa → NH2OH + CH3CH2CH2CH2OH + NaCl

Reactions:

  1. Yeild 13%. [Ref.1, Ref.2, Ref.3aster]
    NH2OH + C2H5ONO + 2C2H5ONa → Na2N2O2 + 3C2H5OH
  2. [Ref.1]
    (CHO)2 + 2NH2OH → (CH=NOH)2 + 2H2O
  3. [Ref.1]
    HCN + NH2OH → HC(NH2)=NOH

Refractive index (nD):

1.44 (23.5°C, для жидкости)

Vapour pressure (Torr):

22 (58°C)

Electrode potential:

N2 + 4H2O + 2e- → 2NH2OH + 2OH-, E = -3.04 V (water, 25°C)

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

-115 (s)

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

-17.4 (s)

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

66.5 (s)

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

16.5

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

47.7

References:

  1. Encyclopedia of explosives and related items. - Vol. 7. - New Jersey, 1975. - pp. H243 - H245
  2. Inorganic Syntheses. - Vol. 1. - New York and London, 1939. - pp. 87-89
  3. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1028
  4. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 97-98 [Russian]
  5. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 402 [Russian]
  6. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 51 [Russian]
  7. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 912 [Russian]
  8. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 14-15 [Russian]
  9. Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 559 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru