Ponceau 4R

Ponceau is a mono azo dye and is primarily composed of trisodium 2 hydroxy-1-Naphtylene-6,8-Disulfonate.

No. Molecular Description Composition


No.   Molecular Description   Composition
  1.   Total colour/Assay, percent by Mass, min.   80
  2.   Water-insoluble matter, percent by mass, Max.   0.2
  3.   Combined ether extracts, percent by mass, Max.   0.2
  4.   Subsidiary dyes, percent by mass, Max.   1
  5.   Dye intermediates, percent by mass, max.
  1-naphthylamine-4-sulfonic acid
  2-naphthol-6,8-di-sulfonic acid
  0.5
  6.   Unsulfonated primary aromatic amine (calculated as aniline) percent by mass, max.   0.01
  7.   Lead, mg/kg, Max.   10
  8.   Arsenic, mg/kg, Max.   3
  9.   Heavy metals, (as pb) mg/kg, max   40
      Mercury, mg/kg, Max.   1
      Cadmium, mg/kg, Max   1

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Ponceau 4r (e124)

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