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Properties of substance:

congo red



skc-file

Group of substances:

organic

Physical appearance:

reddish brown crystals

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

C32H22N6Na2O6S2

Molar/atomic mass: 696.66322

Melting point (°C):

360

CAS №: 573-58-0

Solubility (g/100 g of solvent):

acetone: very slightly soluble [Ref.]
diethyl ether: insoluble [Ref.]
ethanol: soluble [Ref.]
water: 11.6 (20°C) [Ref.]
xylene: practically insoluble [Ref.]

Spectral properties of the substance:

Ultraviolet/visible spectrum (maximum in nm, layer thickness 1 cm, in parentheses - extinction) = 497
Ultraviolet/visible spectrum (maximum in nm, layer thickness 1 cm, in parentheses - extinction) = 488

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 3-122
  2. Sabnis R.W. Handbook of Biological Dyes and Stains. - Wiley, 2010. - pp. 106-109
  3. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 9 [Russian]
  4. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 271-272 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru