Product Description 3,4'-Oxydiphthalic Anhydride Other Details Molecular Formula: C16H6O7 Molecular Weight: 310.21 CAS Number: 50662-95-8 Minimum Purity: 0.95 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