Fast Yellow AB

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Fast Yellow AB

Fast Yellow AB, Fast Yellow, Acid Yellow, C.I. 13015, C.I. 14270 or Food Yellow 2 is an azo dye denoted by E number E105. It is used as a food dye. It is now delisted in both Europe and USA and is forbidden if used in foods and drinks; as toxicological data shown it is harmful.

Its CAS number is [2706-28-7] [1] and its SMILES structure is NC(C(S(=O)(O)=O)=C2) =CC=C2N=NC1=CC=C (S(=O)(O)=O)C=C1.

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