Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 83-48-7, Whether you call it Stigmasterol, 3&#223, -Hydroxy-24-ethyl-5 -22-cholestadiene , 5 -22-Stigmastadien-3&#223 or -ol you can be assured the Stigmasterol products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.