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NAPHTHOL YELLOW S

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NAPHTHOL YELLOW S Basic information
NAPHTHOL YELLOW S Chemical Properties
  • Melting point:>300℃
  • Colour Index 10316
  • form neat
  • Merck 14,6393
  • BRN 2708476
  • Stability:Stable. Incompatible with strong oxidizing agents.
  • EPA Substance Registry SystemC.I. Acid Yellow 1 (846-70-8)
Safety Information
MSDS
NAPHTHOL YELLOW S Usage And Synthesis
  • Chemical Propertieslight yellow powder
  • UsesDye for wool, silk.
  • DefinitionChEBI: An organic sodium salt that is the disodium salt of 5,7-dinitro-8-hydroxynaphthalene-2-sulfonic acid.
  • Purification MethodsIt is a water-soluble greenish yellow powder. The free sulfonic acid can be recrystallised from dilute HCl (m 150o) or AcOH/EtOAc (m 148-149.5o). The disodium salt is then obtained by dissolving the acid in two equivalents of aqueous NaOH and evaporating to dryness and drying the residue in a vacuum desiccator. The sodium salt can be recrystallised from the minimum volume of H2O or from EtOH [Dermer & Dermer J Am Chem Soc 61 3302 1939]. [Beilstein 11 III 542.]
NAPHTHOL YELLOW S(846-70-8)Related Product Information
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