Product Description Methylenecyclobutane Other Details Molecular Formula: C5H8 Molecular Weight: 68.12 CAS Number: 1120-56-5 Minimum Purity: 0.96 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 250mg Leadtime:20 Days Sizes 2: 1g Leadtime:20 Days Sizes 3: 5g Leadtime:20 Days