Scarlet GN

Scarlet GN
Preferred IUPAC name Disodium 3-[(2,4-Dimethyl-5-sulfonatophenyl)hydrazinylidene]-4-oxonaphthalene-1-sulfonate[citation needed]
Other names Crimson 4R[citation needed] C.I. Food Red 1[citation needed] Food red 1[citation needed] FD & C Red no. 4[citation needed] Hexacol Ponceau SX[citation needed] Maple Ponceau SX[citation needed] Ponceau SX Lake 4R purple[citation needed] Purple 4R[citation needed]
Identifiers
CAS number	3257-28-1 (6Z)-6-hydrazinylidene N
PubChem	6537642 (6Z)-6-hydrazinylidene, 5483118 (6E)-6-hydrazinylidene
ChemSpider	5020702 (6Z)-6-hydrazinylidene N
EC number	221-856-3
Jmol-3D images	Image 1 Image 2
SMILES Cc1cc(C)c(NN=c2ccc3c(cccc3c2=O)S(=O)(=O)O[Na])c(c1)S(=O)(=O)O[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]
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
Properties
Molecular formula	Na2C18H14N2S2O7
Molar mass	480.422 g mol-1
Exact mass	480.003781542 g mol-1
N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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 used as a food dye. When used as a food additive, it has the E number E125. It usually comes as a disodium salt.

It is permitted in fruit peels and maraschino cherries.

• CFR - Code of Federal Regulations Title 21: [1] [2] [3]