Fast Yellow AB

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 Registry Number	2706-28-7 Y
Jmol-3D images	Image
SMILES Nc1ccc(cc1OS(O)=O)/N=N/c2ccc(OS(O)=O)cc2
Properties
Chemical formula	C12H11N3O6S2
Molar mass	357.36
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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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.^[1]

References