Product Description Trimethoprim Other Details Molecular Formula: C14H18N4O3 Molecular Weight: 290.32 CAS Number: 738-70-5 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