Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 512-04-9, Whether you call it Diosgenin, 3&#223, -Hydroxy-5-spirostene , [25R]-5-Spirosten-3&#223 or -ol you can be assured the Diosgenin products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.