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Thiol PEG

HS-CH2CH2O-PEG-CH2CH2-SH, Mw 3,400


HS-CH2CH2O-PEG-CH2CH2-SH, Mw 10,000 *make-to-order


HS-CH2CH2O-PEG-CH2CH2-SH, Mw 20,000 *make-to-order