Interaction of copper ion with some food dyes.
D000548:Amaranth Dye; D001391:Azo Compounds; D055598:Chemical Phenomena; D002621:Chemistry; D004396:Coloring Agents; D003300:Copper; D005505:Food Coloring Agents; D006863:Hydrogen-Ion Concentration
D001391:Azo Compounds; D004396:Coloring Agents; D005505:Food Coloring Agents; D003300:Copper; D000548:Amaranth Dye