Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 17230-88-5, Whether you call it Danazol or 17Beta-Hydroxy-2 -4 -17alpha-pregnadien-20-yno[2 -3-d]isoxazole you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.