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, 17&#223, -Hydroxy-2 -4 -17&#945 or -pregnadien-20-yno[2 -3-d]isoxazole you can be assured the Danazol products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.