mPEG4-SH Product Catalog # Size Price (USD) Quantity mPEG4-SH281502-1G1 g$343.00 - mPEG4-SH-1g quantity + mPEG4-SH281502-5G5 g$829.00 - mPEG4-SH-5g quantity + Add to cart Description Synonym: 2,5,8,11-Tetraoxatridecane-13-thiol CAS #: 52190-55-3 Molecular Formula: C9H20O4S Molecular Weight: 224.3