Product Description 4-Bromo-1-butyne Other Details Molecular Formula: C4H5Br Molecular Weight: 132.99 CAS Number: 38771-21-0 Minimum Purity: 0.95 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 4x25g Leadtime:20 Days Sizes 2: 1g Leadtime:20 Days Sizes 3: 5g Leadtime:20 Days