C 4501 (OTTO) Cystamine dihydrochloride, 97% Cas 56-17-7- used to functionalize PGMA (poly(glycidyl methacrylate) microsphere) by introducing sulfhydryl groups for the further fabrication of silver nanoparticles (AgNPs). C 4501 (OTTO) Cystamine dihydrochloride, 97% Cas 56-17-7- utilized as a building block in the synthesis of disulfide cross-linked oligodeoxyribonucleotides and psammaplin A .