What is "citranaxanthin"

n. (context organic compound English) A synthetic monocyclic xanthophyll pigment, 5',6'-dihydro-5'-apo-18'-nor-beta-caroten-6'-one.

Citranaxanthin is a carotenoid pigment used as a food additive under the E number E161i as a food coloring. There are natural sources of citranaxanthin, but it is generally prepared synthetically. It is used as an animal feed additive to impart a yellow color to chicken fat and egg yolks.