Ponceau 4R

Ponceau 4R
Names
	IUPAC name Trisodium (8Z)-7-oxo-8-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]naphthalene-1,3-disulfonate
Identifiers
CAS Number	2611-82-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	11232342 ;
ECHA InfoCard	100.018.216
E number	E124 (colours)
PubChem CID	9570119;
UNII	Z525CBK9PG ;
CompTox Dashboard (EPA)	DTXSID9021213 ;
	InChI InChI=1S/C20H14N2O10S3.3Na/c23-16-7-5-11-9-12(33(24,25)26)10-18(35(30,31)32)19(11)20(16)22-21-15-6-8-17(34(27,28)29)14-4-2-1-3-13(14)15;;;/h1-10,23H,(H,24,25,26)(H,27,28,29)(H,30,31,32);;;/q;3+1/p-3/b22-21+;;; Key: SWGJCIMEBVHMTA-ZRUFZDNISA-K ; InChI=1/C20H14N2O10S3.3Na/c23-16-7-5-11-9-12(33(24,25)26)10-18(35(30,31)32)19(11)20(16)22-21-15-6-8-17(34(27,28)29)14-4-2-1-3-13(14)15;;;/h1-10,23H,(H,24,25,26)(H,27,28,29)(H,30,31,32);;;/q;3+1/p-3/b22-21+;;; Key: SWGJCIMEBVHMTA-QWKJSYRZBY;
	SMILES [Na+].[Na+].[Na+].[O-]S(=O)(=O)c4ccc(c3ccccc34)/N=N/c1c2c(ccc1O)cc(S(=O)(=O)[O-])cc2S(=O)(=O)[O-];
Properties
Chemical formula	C20H11N2Na3O10S3
Molar mass	604.46 g·mol−1
Hazards
NFPA 704 (fire diamond)	1 1 0
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Ponceau 4R (known by more than 100 synonyms,^{: 460–461} including as C.I. 16255, cochineal red A, C.I. acid red 18, brilliant scarlet 3R, brilliant scarlet 4R, new coccine,^: 460) is a synthetic colourant that may be used as a food colouring. It is denoted by E Number E124. Its chemical name is 1-(4-sulfo-1-napthylazo)-2-napthol-6,8-disulfonic acid, trisodium salt. Ponceau (17th century French for "poppy-coloured") is the generic name for a family of azo dyes.

Ponceau 4R is a strawberry red azo dye which can be used in a variety of food products, and is usually synthesized from aromatic hydrocarbons; it is stable to light, heat, and acid but fades in the presence of ascorbic acid.^: 460

It is used in Europe, Asia, and Australia, but has not been approved for human consumption by the United States Food and Drug Administration.^: 460