Product Description Biotin-PEG4-azide Other Details Molecular Formula: C20H36N6O6S Molecular Weight: 488.6 CAS Number: 1309649-57-7 Minimum Purity: 98% (HPLC) UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 25mg Leadtime:20 Days Sizes 2: 100mg Leadtime:20 Days Sizes 3: 500mg Leadtime:20 Days