The chemical Pyriproxyfen has a designated molecular formula of C20H19NO3 and a molecular weight of 321.376 g/mol. Synonyms may include: S 31183, S 9138, 2-(1-Methyl-2-(4-phenoxyphenoxy)ethoxy)pyridine, OMS 3019, 4-Phenoxyphenyl (RS)-2-(2-pyridyloxy)propyl ether, SK 591, HSDB 7053, S31183, Juvinal, S-31183, UNII-3Q9VOR705O, EC 429-800-1 (ChemID).