Tags: Chemical Compound, Chemical Substance.
Citrus Red 2 Citrus Red No. 2 C.I. Solvent Red 80 or C.I. 12156 is an artificial dye. As a food dye it has been permitted by the US Food and Drug Administration (FDA) since 1956 to color the skin of oranges. Citrus Red 2 is listed by the International Agency for Research on Cancer (IARC) as a group 2B carcinogen a substance possibly carcinogenic to humans.