Citranaxanthin is a carotenoid

pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compou ...

used as a food additive under the E number E161i as a

food coloring Food coloring, or color additive, is any dye, pigment, or substance that imparts color when it is added to food or drink. They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used in both commercial food ...

. 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 Chicken fat is fat obtained (usually as a by-product) from chicken rendering and processing. Of the many animal-sourced substances, chicken fat is noted for being high in linoleic acid, an omega-6 fatty acid. Linoleic acid levels are between ...

and egg yolks.Citranaxanthin
International Programme on Chemical Safety

References

Carotenoids Food colorings Cyclohexenes {{organic-compound-stub