1) Food coloring 
Apocarotenal, or trans-β-apo-8`-carotenal, is a carotenoid found in spinach and citrus fruits. Like other carotenoids, apocarotenal plays a role as a precursor of vitamin A, even though it has 50% less pro-vitamin A activity than β-carotene. The empirical chemical formula for apocarotenal is C30H40O. Apocarotenal has an orange to orange-red col....