Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 762-42-5, Whether you call it Dimethyl Acetylenedicarboxylate, Acetylene Dicarboxylic Acid Dimethyl Ester or DMAD you can be assured the Dimethyl Acetylenedicarboxylate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.