Product Description Biotin-PEG2-NHS Other Details Molecular Formula: C21H32N4O8S Molecular Weight: 500.6 CAS Number: 596820-83-6 Minimum Purity: 0.95 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 10mg Leadtime:65 Days Sizes 2: 25mg Leadtime:65 Days Sizes 3: 50mg Leadtime:65 Days