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Properties of substance:

sulfamic acid

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

H3NO3S

Structural formula as text:

NH2SO3H

Molar/atomic mass: 97.098

Melting point (°C):

205

Decomposition temperature (°C):

210-260

Solubility (g/100 g of solvent):

acetone: 0.04 (25°C) [Ref.]
diethyl ether: 0.01 (25°C) [Ref.]
formamide: 0.18 (25°C) [Ref.]
methanol: 0.4 (25°C) [Ref.]
n-butylamine: sparingly soluble [Ref.]
water: 12.8 (0°C) [Ref.]
water: 17.57 (20°C) [Ref.]
water: 22.77 (40°C) [Ref.]
water: 27.06 (60°C) [Ref.]
water: 32.01 (80°C) [Ref.]

Numerical data:

Year of discovery: 1878

Density:

2.126 (25°C, g/cm3)

Dissociation:

pKa (1) = 1 (25°C, water)

Standard molar enthalpy (heat) of formation ΔfH (298 K, kJ/mol)

-683.9 (s) [Ref.]

LD50 (mg/kg):

1600 (rats, )
3100 (mice, )

References:

  1. Chemical Reviews. - 1940. - Vol. 26, No. 1. - pp. 52-64 [DOI: 10.1021/cr60083a003]
  2. Chemical Reviews. - 1980. - Vol. 80, No. 2. - pp. 151-186 [DOI: 10.1021/cr60324a002]
  3. Chemical Reviews. - 2014. - Vol. 114, No. 4. - pp. 2507-2586
  4. Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 89-90 [Russian]
  5. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 398 [Russian]
  6. Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 454 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru