Limited information on the reaction and fate of Erythrosine in food is available. In general, the majority of colour additives are unstable in combination with oxidising and reducing agents in food. Since colour depends on the existence of a conjugated unsaturated system within the dye molecule, any substance which modifies this system (e.g. oxidising or reducing agents, sugars, acids, and salts) will affect the colour (Scotter and Castle, 2004). When cherries coloured with Erythrosine are stored in uncoated steel cans, fluorescein is readily formed. The production of fluorescein from Erythrosine occurs in the presence of iron and/or tin and free organic acid as a result of electrochemical reduction in the can (Dickinson and Raven, 1962). This does not occur in coated cans.