Reply #19: I'm not sure you would ingest Citrus Red #2, unless you

[DLnyc]

eat the orange peel:

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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 is permitted by Food and Drug Administration (FDA) since 1956 only for use in the United States to color the skin of oranges.<1><2><3><4> Citrus Red 2 is listed as an IARC Group 2B carcinogen, meaning that it is "possibly carcinogenic to humans".<5> However, it does not penetrate the orange peel into the pulp.
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http://en.wikipedia.org/wiki/Citrus_Red_2