mPEG6-NHS Product Catalog # Size Price (USD) Quantity mPEG6-NHS281307-500MG500 mg$360.00 - mPEG6-NHS-500mg quantity + mPEG6-NHS281307-1G1 g$540.00 - mPEG6-NHS-1g quantity + Add to cart Description CAS #: 874208-92-1 Molecular Formula: C20H35NO11 Molecular Weight: 465.5