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Properties of substance:

formamidinesulfinic acid



skc-file

Group of substances:

inorganic

Physical appearance:

white crystals

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

CH4N2O2S

Structural formula as text:

(H2N)2SO2

Molar/atomic mass: 108.12

Melting point (°C):

123

Solubility (g/100 g of solvent):

acetonitrile: practically insoluble [Ref.]
dimethylformamide: 0.1 (31°C) [Ref.]
dimethylformamide: 0.11 (35°C) [Ref.]
dimethylformamide: 0.12 (45°C) [Ref.]
dimethylsulfoxide: 2.29 (31°C) [Ref.]
dimethylsulfoxide: 2.37 (35°C) [Ref.]
dimethylsulfoxide: 2.65 (45°C) [Ref.]
ethanol: 0.75 (20°C) [Ref.]
formamide: 2.18 (31°C) [Ref.]
formamide: 2.25 (35°C) [Ref.]
formamide: 2.65 (45°C) [Ref.]
nitromethane: practically insoluble [Ref.]
propylene carbonate: practically insoluble [Ref.]
tetrahydrofuran: practically insoluble [Ref.]
water: 3 (20°C) [Ref.]
water: 4.25 (31°C) [Ref.]
water: 4.86 (35°C) [Ref.]

Hygroscopic:

yes

Numerical data:

Year of discovery: 1910

Dissociation:

pKa (1) = 6.82 (25°C, water)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 3-278
  2. Буданов В.В., Макаров С.В. Химия серосодержащих восстановителей (ронгалит, дитионит, диоксид тиомочевины). - М.: Химия, 1994 [Russian]
  3. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.2. - Л.: Химия, 1976. - pp. 58 [Russian]
  4. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.2. - Л.: Химия, 1976. - pp. 58 [Russian]
  5. Физер Л., Физер М. Реагенты для органического синтеза. - Т. 7. - М.: Мир, 1978. - pp. 499 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru