HS-PEG4-Propyne Product Catalog # Size Price (USD) Quantity HS-PEG4-Propyne285301-500MG500 mg$350.00 - HS-PEG4-Propyne-500mg quantity + HS-PEG4-Propyne285301-1G1 g$573.00 - HS-PEG4-Propyne-1g quantity + Add to cart Description Molecular Formula: C11H20O4S Molecular Weight: 248.3