Product Description Methyl-PEG8-NHS ester Other Details Molecular Formula: C22H39NO12 Molecular Weight: 509.55 CAS Number: 756525-90-3 Minimum Purity: 0.95 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 250mg Leadtime:20 Days Sizes 2: 1g Leadtime:20 Days Sizes 3: 0 Leadtime:0