Ponceau 6R

This article is about Ponceau 6R. For other uses, see Ponceau (disambiguation).

Ponceau 6R

Names
Other names Ponceau 6R
Identifiers
CAS Number	2766-77-0 Y
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL368082
ChemSpider	16736230
PubChem CID	165025
UNII	W8UOR0932R Y
SMILES [Na+].[Na+].[Na+].[Na+].Oc1cc(c2ccccc2c1N=Nc3c(O)c(cc4cc(cc(c34)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-]
Properties
Chemical formula	C20H12N2Na2O7S2
Molar mass	502.42 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ponceau 6R, or Crystal ponceau 6R, Crystal scarlet, Brilliant crystal scarlet 6R, Acid Red 44, or C.I. 16250, is a red azo dye. It is soluble in water and slightly soluble in ethanol. It was used as a food dye, formerly having E number E126. It is also used in histology, for staining fibrin with the MSB Trichrome stain. It usually comes as disodium salt.

Amaranth is a closely related azo dye, also usable in trichrome staining.