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Properties of substance:

methyl orange



skc-file

Synonyms:

sodium p-dimethylaminoazobenzenesulfonate

Group of substances:

organic

Physical appearance:

orange-yellow crystals

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

C14H14N3NaO3S

Molar/atomic mass: 327.34

Melting point (°C):

300

CAS №: 547-58-0

Solubility (g/100 g of solvent):

diethylene glycol: 4.2 (25°C) [Ref.]
ethanol: insoluble [Ref.]
ethylene glycol : 1.8 (25°C) [Ref.]
pyridine: 1.8 (20°C) [Ref.]
pyridine 50% aq.: 51.5 (20°C) [Ref.]
water: 0.02 (20°C) [Ref.]

References:

  1. Sabnis R.W. Handbook of Biological Dyes and Stains. - Wiley, 2010. - pp. 302-304
  2. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 701, 753, 830
  3. The Merck Index 11th ed., Merck & Company, 1989. - pp. 959
  4. Индикаторы. - Т.1. - М.: Мир, 1976. - pp. 110-112 [Russian]
  5. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 334 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru