Ponceau (French for "poppy-colored") may refer to:
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Ponceau 2R
Ponceau 2R, Xylidine ponceau, Ponceau G, Red R, Acid Red 26, Food Red 5, or C.I. 16150 is a red azo dye used in histology for staining. It is easily soluble in water and slightly in ethanol. It usually comes as a disodium salt.
Xylidine poncea ...
(also called Xylidine ponceau or Ponceau G, among other synonyms), azo dye used in histology for staining
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Ponceau 3R
Ponceau 3R (Colour Index International, C.I. 16155) is an azo dye that once was used as a red food colorant.{{cite journal, title=A Global Perspective on the History, Use, and Identification of Synthetic Food Dyes, author1=Sharma, Vinita, author2= ...
, delisted food colorant
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Ponceau 4R (known by more than 100 synonyms), synthetic colourant used as a food colouring (E Number E124)
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Ponceau 6R (Ponceau 6R or Crystal ponceau 6R, among other synonyms), food dye (E number E126) and histology stain
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Ponceau S (also known as Acid Red 112 or C.I. 27195), histology stain
* Ponceau SX, another name for
Scarlet GN, once used as a food dye (E number E125)
{{disambiguation