Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 553-90-2, Whether you call it Oxalic Acid Dimethyl Ester, Ethanedioic Acid Dimethyl Ester or Oxalic Acid Dimethyl Ester you can be assured the Oxalic Acid Dimethyl Ester products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.