Fast Yellow AB

Template:Chembox IndexlistTemplate:Chembox CompToxTemplate:Chembox GHS (set)Template:Chembox Datapage check

Fast Yellow AB

Names
IUPAC name 2-amino-5-[(E)-(4-sulfophenyl)diazenyl]benzenesulfonic acid
Other names Fast Yellow Acid Yellow Food Yellow 2 C.I. 13015
Identifiers
CAS Number	101-50-8 checkY
3D model (JSmol)	Interactive image
ChEBI	CHEBI:86124
ChEMBL	ChEMBL2172377
ChemSpider	54957
EC Number	Template:Chembox ECNumber/format Template:Chembox ECNumber/format Template:Chembox ECNumber/format Template:Chembox ECNumber/format Template:Chembox ECNumber/format Template:Chembox ECNumber/format
PubChem CID	60996 75918 Na salt
RTECS number	Template:Chembox RTECS/format Template:Chembox RTECS/format Template:Chembox RTECS/format Template:Chembox RTECS/format Template:Chembox RTECS/format Template:Chembox RTECS/format
UNII	2ZQE5CCH2H checkY
InChI InChI=1S/C12H11N3O6S2/c13-11-6-3-9(7-12(11)23(19,20)21)15-14-8-1-4-10(5-2-8)22(16,17)18/h1-7H,13H2,(H,16,17,18)(H,19,20,21) Key: DCYBHNIOTZBCFS-UHFFFAOYSA-N
SMILES Nc1ccc(cc1OS(O)=O)/N=N/c2ccc(OS(O)=O)cc2
Properties
Chemical formula	C12H11N3O6S2
Molar mass	357.36 g·mol−1
Hazards
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). checkY verify (what is checkY☒N ?) Infobox references

Fast Yellow AB is an azo dye. It used to be used as a food dye, designated in Europe by the E number E105. It is now delisted in both Europe and USA and is forbidden if used in foods and drinks, as toxicological data has shown it is harmful. E105 has been implicated in non-atopic asthma.