Scarlet GN

Scarlet GN

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
CAS Registry Number	4548-53-2 (Z) N
ChemSpider	5020702 (Z) N
EC number	221-856-3
InChI 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
Jmol-3D images	Image Image
PubChem	6537642 (Z) 5483118 (E)
SMILES [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]
UNII	X3W0AM1JLX N
Properties
Molecular formula	C18H14N2Na2O7S2
Molar mass	480.42 g·mol−1
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
N verify (what is: Y/N?)
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 as a food additive and may only be used in externally applied drugs and cosmetics.^[1][2][3] An exception was added to allow the coloring of maraschino cherries, which then are considered mainly decorative and not a foodstuff.^[4] In the European Union, it is not permitted as a food additive.^[5]

References