Ponceau 4R

Ponceau 4R
Names
	IUPAC name Trisodium (8Z)-7-hidroxi-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, including as C.I. 16255, cochineal red A, C.I. acid red 18, brilliant scarlet 3R, brilliant scarlet 4R, new coccine,) 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.

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