Scarlet GN

Scarlet GN
Kekulé, canonical skeletal formula of scarlet GN ((6E)-6-hydrazinylidene)
Names
Systematic IUPAC name
Disodium 3-[(2,4-Dimethyl-5-sulfonatophenyl)hydrazinylidene]-4-oxonaphthalene-1-sulfonate
Other names
Crimson 4R; C.I. Food Red 1; Food red 1; FD & C Red no. 4; Hexacol Ponceau SX; Maple Ponceau SX; Ponceau SX; Purple 4R; E125
Identifiers
  • 4548-53-2 (Z) ☒N
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.019.870 Edit this at Wikidata
EC Number
  • 221-856-3
E number E125 (colours)
UNII
  • InChI=1S/C18H16N2O7S2.2Na/c1-10-8-11(2)17(16(9-10)29(25,26)27)20-19-14-7-6-12-13(18(14)21)4-3-5-15(12)28(22,23)24;;/h3-9,20H,1-2H3,(H,22,23,24)(H,25,26,27);;/q;2*+1/p-2/b19-14-;; ☒N
    Key: AQJHOKDCKYSJAS-MHZTUVSFSA-L ☒N
  • [Na+].Cc3cc(S(=O)(=O)[O-])c(N=Nc2c(O)c1c(cc2)c(S(=O)(=O)[O-])ccc1)c(C)c3.[Na+]
  • CC1=CC(=C(NN=C2C=CC3=C(C=CC=C3C2=O)S(=O)(=O)O[Na])C(C)=C1)S(=O)(=O)O[Na]
Properties
C18H14N2Na2O7S2
Molar mass 480.42 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Scarlet GN, or C.I. Food Red 1, Ponceau SX, FD&C Red No. 4, or C.I. 14700 is a red azo dye once used as a food dye. As a food additive, it has the E number E125. It usually used as a disodium salt.

In the United States, it is not permitted for use in food or ingested drugs and may only be used in externally applied drugs and cosmetics. An exception was added in 1965 to allow its use in the coloring of maraschino cherries, which were considered mainly decorative and not a foodstuff. This exception was repealed in 1976 due to mounting safety concerns. In the European Union, it is not permitted as a food additive.


This page was last updated at 2021-11-20 02:21 UTC. Update now. View original page.

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