MF: C14 H16 N2 O8 S2, MW: 404.42, Alternative names: 3,3'-Dithiodipropionic acid di(N-hydroxysuccinimide ester); Di(N-succinimidyl) 3,3′-dithiodipropionate; Dithiobis-succinimidyl propionate. DSP crosslinker (DTSP; Dithiobis[succinimidyl propionate]; Lomant's Reagent) is a homobifunctional and cleavable crosslinker that is cell membrane permeable.