Product Description Magnesium oxide, heavy, ~325 Mesh Other Details Molecular Formula: MgO Molecular Weight: 40.3 CAS Number: 1309-48-4 Minimum Purity: 0.96 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 5g Leadtime:20 Days Sizes 2: 25g Leadtime:20 Days Sizes 3: 100g Leadtime:20 Days