Product Description Surfen (NSC-12155) Other Details Molecular Formula: C21H20N6O.2HCl Molecular Weight: 372.42 CAS Number: 5424-37-3 (3811-56-1 Free Base) Minimum Purity: 0.98 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: 50mg Leadtime:20 Days