Amaranth Dye

**Definition:** A sulfonic acid-based naphthylazo dye used as a coloring agent for foodstuffs and medicines and as a dye and chemical indicator. It was banned by the FDA in 1976 for use in foods, drugs, and cosmetics. (From Merck Index, 11th ed)

**Tree numbers:** - D02.172.025 - D02.455.426.559.847.638.555.200 - D02.886.645.600.080.050.650.012 - D04.615.638.555.200

**Synonyms:** - C.I. Food Red 9 - AR27 Compound - C.I. Acid Red 27 - Acid Red 27 - Azorubin S