Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 84-66-2, Whether you call it Diethyl Phthalate, 1 -2-Benzenedicarboxylic Acid - Diethyl Ester or Ethyl Phthalate you can be assured the Diethyl Phthalate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.