Red 4

Red 4 is classified chemically as a monoazo color. It conforms to the formula: C18H16N2O7S2 • 2Na.
CAS Numbers:
  • 4548-53-2
EC/List Numbers:
  • 224-909-9
Technical Names:
  • 1-Naphthalenesulfonic Acid, 3-2-[(2,4-Dimethyl-5-Sulfophenyl)Diazenyl]-4-Hydroxy-, Sodium Salt (1:2)
  • 1-Naphthalenesulfonic Acid, 3-[(2,4-Dimethyl-5-Sulfophenyl)Azo]-4-Hydroxy-, Disodium Salt
  • 3-[(2,4-Dimethyl-5-Sulfophenyl)Azo]-4-Hydroxy-1-Naphthalenesulfonic Acid, Disodium Salt
  • C.I. Red 4
  • CI 14700 (INCI)
  • CI Food Red 1
  • FD&C Red No. 4 (should be used only if batch certified by the U.S. Food and Drug Administration)
  • Ponceau SX (INCI)
  • Red 4 (INCI)
  • Red No. 504
Product Categories:
  • Cleaning Products
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