mPEG9-NHS Product Catalog # Size Price (USD) Quantity mPEG9-NHS281308-500MG500 mg$405.00 - mPEG9-NHS-500mg quantity + mPEG9-NHS281308-1G1 g$650.00 - mPEG9-NHS-1g quantity + Add to cart Description Molecular Formula: C26H47NO14 Molecular Weight: 597.6