It is unlike carotin and xanthophyll in that it has basic properties, forming salts with acids, which are blue in color.
xanthophyll: the yellow of autumn leaves; one of the substances found in the blood of insects.
To separate the carotin from xanthophyll place the ether solution in a small open dish and evaporate to a small volume.
Any of various yellow pigments occurring in the leaves of plants and giving young shoots and late autumn leaves their characteristic color. This color is masked by chlorophyll when the leaf is mature. Xanthophylls aid in the absorption of light by capturing certain wavelengths not captured by chlorophyll and rapidly transferring the energy to chlorophyll by boosting one of its electrons to a higher energy level. Xanthophylls are carotenoids, differing from carotenes in having one or more oxygen-containing groups attached. See also carotene.