Nitrophenyl Carbonate-PEG-Nitrophenyl Carbonate (NPC-PEG-NPC) is available in molecular weights of 2,000, 3,400 and 5,000. This product will be bottled in 1 gram or 5 gram bottles, depending on the item you order. Other MW available as custom products. Shipping charges will be calculated based on the total order.
