CAS 67665-18-3 appears in our catalog under these names: mPEG-CH2COOH average Mw1000, mPEG-CH2COOH average Mw5000, mPEG-CH2COOH average Mw2000, mPEG-CH2COOH average Mw10000. Offered by: Ambeed. Available pack sizes: 250mg, 1g, 5g, 10g, 25g, 100g, 100mg.