H2N-PEG2-Propyne-500mg$309.00 H2N-PEG2-Propyne Product Catalog # Size Price (USD) Quantity H2N-PEG2-Propyne-500mg 285401-500MG 500 mg $309.00 - H2N-PEG2-Propyne-500mg quantity + For more size options, please click: H2N-PEG2-Propyne Add to cart Additional information Additional information Weight 0.0005 kg Size 500 mg For Research & Development use only. Not for testing and/or use on humans.