H2N-PEG2-Propyne Product Catalog # Size Price (USD) Quantity H2N-PEG2-Propyne285401-500MG500 mg$309.00 - H2N-PEG2-Propyne-500mg quantity + H2N-PEG2-Propyne285401-1G1 g$463.00 - H2N-PEG2-Propyne-1g quantity + Add to cart Description CAS #: 944561-44-8 Molecular Formula: C7H13NO2 Molecular Weight: 143.2