Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 6493-05-6, Whether you call it Pentoxifylline, 3 -7-Dimethyl-1-(5-oxohexyl)xanthine or Oxpentifyllin you can be assured the Pentoxifylline products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.