Blue 2 lake

Blue 2 lake or FD&C Blue No. 2 lake also known as Indigotine or Indigo Blue, is a synthetic dye derived from indigo, a natural colorant substance. The name describes the structure of the molecule. FD&C indicates that the color is approved by the United States Food and Drug Administration (FDA) for use in foods, drugs, and cosmetics. (1987) BLUE #2...