HS-PEG4-CH2CH2COOH Product Catalog # Size Price (USD) Quantity HS-PEG4-CH2CH2COOH282702-1G1 g$573.00 - HS-PEG4-CH2CH2COOH-1g quantity + HS-PEG4-CH2CH2COOH282702-5G5 g$1,433.00 - HS-PEG4-CH2CH2COOH-5g quantity + Add to cart Description CAS #: 749247-06-1 Molecular Formula: C11H22O6S Molecular Weight: 282.4