CAS 57260-73-8 appears in our catalog under these names: NH2-C2-NH-Boc, NH2–C2–NH–Boc, N-Boc-ethylenediamine, 98%, may cont up to 5% tert-butanol , N-Boc-ethylenediamine, NHS-dPEG®,4-Biotinidase Resistant Biotin. Offered by: TRC, TargetMol, GLPBio, Thermo Scientific (Alfa Aesar), Biosynth. Available pack sizes: 1g, 100mg, 500mg, 5g, 25g, 0,25kg, 0,5kg, 1000mg.