OTs-PEG-OTs

Alpha,omega-bis(p-toluenesulfonate) poly(ethylene glycol) (TsO-PEG-OTs) is a homobifunctional precision PEG derivative with a defined chain length. Both ends bear tosylate groups. Discrete chain lengths with different degrees of polymerization are available. The tosylate acts as a leaving group, enabling nitrogen- or sulfur-containing functional moieties to be introduced by nucleophilic substitution. Identical reactive sites at both ends support molecular bridging or derivatization on both sides. The conjugation scheme can be designed around the number of target sites.

Customization available.