Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 97-59-6, Whether you call it Allantoin, 5-Ureidohydantoin or (2 -5-Dioxo-4-imidazolidinyl)urea you can be assured the Allantoin products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.