Product Description 4,4′-Methylenediantipyrine Other Details Molecular Formula: C23H24N4O2.H2O Molecular Weight: 406.48 (388.47 anhy) CAS Number: 1251-85-0 Minimum Purity: 0.97 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: 0 Leadtime:0