FD&C Blue No. 2 Aluminum Lake is approved for use in foods, drugs and cosmetics. It is a synthetic food coloring.
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The name of a lake is formed from the name of the color additive combined with
the name of the basic radical and the word "Lake". For example, the name of the
lake prepared by extending the aluminum salt of FD&C Blue No. 1 upon alumina
would be FD&C Blue No. 1 - Aluminum Lake.
If a lake is prepared by extending an FD&C color additive on a substratum
other than alumina, the symbol "FD&C" will be replaced by "D&C". For
example, the name of the lake prepared by extending the aluminum salt of
FD&C Blue No. 1 upon a substratum other than alumina would be D&C Blue
No. 1- Aluminum Lake.
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While most dyes are water soluble, lake dyes are water-insoluble. That means
that lake dyes will not bleed or run together because they do not dissolve in
water very well.
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