Ponceau 6R

Ponceau 6R
Names
	Other names Ponceau 6R
Identifiers
CAS Number	2766-77-0 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL368082;
ChemSpider	16736230;
ECHA InfoCard	100.018.584
E number	E126 (colours)
PubChem CID	165025;
UNII	W8UOR0932R ;
	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 is used as a food dye, with 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.

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