Use the drop‑down menus to label the given statements either true or false. a. Azo dyes are stable. b. Azo dyes are nontoxic. c. Most azo dyes are not used as food coloring. d. Leucoindigo is deep purple in color.

a. Azo dyes are stable. False

b. Azo dyes are nontoxic. False

c. Most azo dyes are not used as food coloring. True

d. Leucoindigo is deep purple in color. True

Explanation:

Azo dyes are not very stable in sunlight.

Azo family dyes have toxic and carcinogenic effects.

Azo dyes are the ones that generate the most controversy due to the multiple cases of allergies with which they are related. There are also many studies that talk about azo dyes and the probability that the risk of some cancers increased, so it is little used as a dye in food.

Th deep purple dye known as indigo is reduced to a water-soluble derivative, leucoindigo.