Customer Service
H2N-(CH2)3-O-PEG-(CH2)5-COOH, Mw 2,000
H2N-(CH2)3-O-PEG-(CH2)5-COOH, Mw 3,400
H2N-(CH2)3-O-PEG-(CH2)5-COOH, Mw 5,000
