Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 59-33-6, Whether you call it Pyrilamine Maleate, Mepyramine Hydrogen Maleate , Pyranisamine Maleate , Mepyramine Maleate or Midol you can be assured the Pyrilamine Maleate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.