The chemical Allantoin has a designated molecular formula of C4H6N4O3 and a molecular weight of 158.117 g/mol. Synonyms may include: 5-25-15-00338 (Beilstein Handbook Reference), AI3-15281, Alantan, Allantol, AVC/Dienestrolcream, BRN 0102364, Caswell No. 024, CCRIS 1958, Cordianine, (2,5-Dioxo-4-imidazolidinyl)urea, EINECS 202-592-8, EPA Pesticide Chemical Code 085701 (ChemID).