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Ponceau 4R
Chemical compound / From Wikipedia, the free encyclopedia
Ponceau 4R (known by more than 100 synonyms,[1]: 460–461 including as C.I. 16255,[2] cochineal red A,[2] C.I. acid red 18,[2] brilliant scarlet 3R,[2] brilliant scarlet 4R,[2] new coccine,[1]: 460 ) is a synthetic colourant that may be used as a food colouring. It is denoted by E Number E124.[2] 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.
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Names | |
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IUPAC name
Trisodium (8Z)-7-oxo-8-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]naphthalene-1,3-disulfonate | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.018.216 ![]() |
E number | E124 (colours) |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C20H11N2Na3O10S3 | |
Molar mass | 604.46 g·mol−1 |
Hazards | |
NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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.[1]: 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.[1]: 460 [2]
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