Chemistry:Yellow 2G

Yellow 2G

Names
IUPAC name Disodium 2,5-dichloro-4-[3-methyl-5-oxo-4-(4-sulfonatophenyl)diazenyl-4H-pyrazol-1-yl]benzenesulfonate
Other names Lissamine Fast Yellow; C.I. Acid Yellow 17; C.I. 18965; Light Fast Yellow 2G; C.I. Food Yellow 5; Acid Leather Yellow 2GL; Erio Flavine SX; Fenalan Yellow G; Erio Flavine 3G; Kayacyl Yellow GG
Identifiers
CAS Number	6359-98-4 Y
3D model (JSmol)	Interactive image
ChEBI	tautomer: CHEBI:90206 N
ChemSpider	3490830 Y
PubChem CID	22842 acid: 4284331
UNII	Y428W9WW4D Y
InChI InChI=1S/C16H12Cl2N4O7S2.2Na/c1-8-15(20-19-9-2-4-10(5-3-9)30(24,25)26)16(23)22(21-8)13-6-12(18)14(7-11(13)17)31(27,28)29;;/h2-7,15H,1H3,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2 Key: FTZLWXQKVFFWLY-UHFFFAOYSA-L acid: InChI=1S/C16H12Cl2N4O7S2/c1-8-15(20-19-9-2-4-10(5-3-9)30(24,25)26)16(23)22(21-8)13-6-12(18)14(7-11(13)17)31(27,28)29/h2-7,15H,1H3,(H,24,25,26)(H,27,28,29)/p-2/b20-19+ Key: DWYWPBYWDAZKNX-FMQUCBEESA-L
SMILES CC1=NN(C(=O)C1N=NC2=CC=C(C=C2)S(=O)(=O)[O-])C3=CC(=C(C=C3Cl)S(=O)(=O)[O-])Cl.[Na+].[Na+]
Properties
Chemical formula	C16H10N4Na2O7S2
Molar mass	480.38 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Tracking categories (test):

• SizeSet

Yellow 2G is a food coloring denoted by E number E107 with the color index CI18965. It has the appearance of a yellow powder, and it is soluble in water. It is a synthetic yellow azo dye.

It is not listed by the UK's Food Standards Agency among EU approved food additives. Its use is also banned in Austria, Japan , Norway , Sweden, Switzerland and the United States .