Description Application 1,2-Diethylhydrazine dihydrochloride was used in the synthesis of 4,5-dihydro-pyrazole, pyrazolidine and 1,2-dihydro-phthalazine derivatives. Reactant involved in: • Bromopyridazinedione-mediated protein and peptide bioconjugation • Synthesis of human neutrophil proteinase 3 inhibitors • Three-component cascade processes for sythesis of aminoisoindolones and phthalazones • Stereoselective heterocyclization for synthesis of substituted hexahydropyrazolodiazepinecarboxylates • Synthesis of azacycloalkanes, isoindoles, pyrazole, pyrazolidine, and phthalazine derivatives Packaging 5 g in glass bottle