Azorubine

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Azorubine, carmoisine, Food Red 3, Azorubin S, Brillantcarmoisin O, Acid Red 14, or C.I. 14720 is a synthetic red food dye from the azo dye group. It usually comes as a disodium salt. It is a red to maroon powder. It is used for the purposes where the food is heat-treated after fermentation. It has E number E122. Some of the foods it can be present in are blancmange, marzipan, Swiss roll, jams, preserves, yoghurts, jellies, breadcrumbs, and cheesecake mixes.

It appears to cause allergic or intolerance reactions, particularly amongst those with an aspirin intolerance. Other reactions can include a rash similar to nettle rash and skin swelling. Asthmatics sometimes react badly to it.

It is one of the colourants that the Hyperactive Children's Support Group recommends be eliminated from the diet of children.

Azorubine is commonly used in the UK, but it is a prohibited food additive in Japan, Norway, Sweden, and the United States.

Its CAS number is [3567-69-9] [1] and its SMILES structure is OC(C(C=CC=C4)=C4 C(S(=O)([O-])=O)=C3) =C3N=NC1=CC=C (S(=O)([O-])=O) C2=C1C=CC=C2.