Cyromazine (CGA-72662) is an ectoparasiticide. Insect growth regulator. Specific activity against dipterous larvae. Cyromazine is a fda approved for use in livestock.

In both plants and animals, Cyromazine undergoes dealkylation metabolism and, through environmental degradation, forms melamine.

Cyromazine may act at certain stages of cuticle sclerotization, with little to no effect on dihydrofolate reductase and the activity of aminomethylphosphonic acid. It alters the percentage or total content of phenylalanine and tyrosine amino acids in the pupal exoskeleton cuticle, resulting in larvae exhibiting typical signs of Cyromazine intoxication. The mechanism of action likely involves inhibiting the synthesis of chitin and scleroprotein.