CAS 92451-00-8 appears in our catalog under these names: MeO-PEG-NHS (10 kDa), MeO-PEG-NHS (2 kDa), MeO-PEG-NHS (20 kDa), MeO-PEG-NHS (5 kDa), MeO-PEG-NHS (750 Da). Offered by: Iris Biotech, Sigma-Aldrich, Chemat. Available pack sizes: 1g, 5g, 250MG.