0 Allantoin CAS 97-59-6 In APIs, Pharmaceutical Chemicals, Products 97-59-6,Allantoin,5-Ureidohydantoin; Glyoxyldiureide; Glyoxylic diureide; Cordianine; Glyoxyldiureid; (2,5-Dioxo-4-imidazolidinyl)urea