Product Description Leucine Enkephalin Other Details Molecular Formula: C28H37N5O7 Molecular Weight: 555.62 CAS Number: 58822-25-6 Minimum Purity: 0.95 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 10mg Leadtime:20 Days Sizes 2: 25mg Leadtime:20 Days Sizes 3: 50mg Leadtime:20 Days