Product Description Methyldiphenylphosphine oxide Other Details Molecular Formula: C13H13OP Molecular Weight: 216.22 CAS Number: 2129-89-7 Minimum Purity: 0.98 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 1g Leadtime:20 Days Sizes 2: 5g Leadtime:20 Days Sizes 3: 25g Leadtime:20 Days