CAS 135649-01-3 appears in our catalog under these names: Methoxy polyethylene glycol succinimidyl carbonate, 97% average Mw1000, 97% average Mw1000, mPEG-NHS, 97% average Mw1000, mPEG-NHS, 97% average Mw2000, mPEG-NHS, 97% average Mw5000, Methoxy polyethylene glycol succinimidyl carbonate. Offered by: Chemat, Ambeed, BLDpharm, Fluorochem. Available pack sizes: 10g, 250mg, 1g, 5g, 25g, 100mg.