"Coal Tar Colors (FD&C, D&C) are derived from petroleum waste, research has suggested FD&C Blue No.1 and FD&C Green No. 3 are carcinogenic (cancer-causing), and D&C Red No. 33, FD&C Yellow No. 5, and FD&C Yellow No. 6 can contain impurities that may cause cancer when applied to the skin. They have been banned for use in Canada and the European Union. FD&C Yellow No. 5 is also used in foods and is known as tartrazine, and can worsen asthma and breathing problems."
"Red No. 3, also known by its chemical name Erythrosine, is a cherry-pink dye used to color products like maraschino cherries, pistachios, canned fruit, candy, popsicles, cake decorating gels, and toothpaste. It is also used in printing inks, as a biological stain, a dental plaque disclosing agent, and in X-rays. In 1990, the U.S. FDA placed a partial ban on Red No. 3 after research showed high doses could cause cancer in rats."
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