Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 723-46-6, Whether you call it Sulfamethoxazole, N1-(5-Methylisoxazol-3-yl)sulfanilamide or Sulfisomezole you can be assured the Sulfamethoxazole products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.