All products PEG diols mPEG PEG azides & amines Amino PEG acids PEG esters and acids PEG thiols and disulfides Special reagents PEG cat nr. Product n MW CAS 10110-0895 PEG-8 8 370.4 5117-19-1 10110-1295 PEG-12 12 546.7 6790-09-6 10110-2895 PEG-28 28 1251.5 1053658-70-0