mPEG36-NHS Product Catalog # Size Price (USD) Quantity mPEG36-NHS281313-250MG250 mg$684.00 - mPEG36-NHS-250mg quantity + mPEG36-NHS281313-1G1 g$1,548.00 - mPEG36-NHS-1g quantity + Add to cart Description Molecular Formula: C80H155NO41 Molecular Weight: 1787.1