Product Description Topotecan HCl Other Details Molecular Formula: C23H24ClN3O5 Molecular Weight: 457.91 CAS Number: 119413-54-6 Minimum Purity: 99% (HPLC), powder UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 5mg Leadtime:20 Days Sizes 2: 10mg Leadtime:20 Days Sizes 3: 25mg Leadtime:20 Days