Product Description Guanine Other Details Molecular Formula: C5H5N5O Molecular Weight: 151.13 CAS Number: 73-40-5 Minimum Purity: 98% (HPLC) 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