Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 583-93-7, Whether you call it DL-a-e-Diaminopimelic Acid, 2 -6-Diaminoheptanedioic Acid, DL-&#945, -&#949 or -Diaminopimelic Acid you can be assured the DL-a-e-Diaminopimelic Acid products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.