Red Dye No. 3, also known as erythrosine, is a synthetic food dye that gives foods and drinks a bright red color. It is also sometimes used in oral medicines and dietary supplements. It first was approved for use in food in 1907. It's made from petroleum.

T he U.S. Food and Drug Administration has banned the use of red dye No. 3 in foods, more than three decades after researchers discovered its link to cancer in rodents and to worsened attention deficit and hyperactivity disorder and other behavioral symptoms. The dye is already banned from foods in the European Union, New Zealand and Australia.