1H-Pyrazole,4-(4,4,5,5-tetramethyl-1

4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (pyrazole-4-boronic acid pinacol ester, CAS 269410-08-4, molecular formula C9H15BN2O2, MW 194.04) is manufactured directly by Chem-Stone (Guangzhou) Co., Ltd. It has a melting point of 142-146°C, a boiling point of 335.4°C at 760 mmHg, a density of 1.09 g/cm3, and a flash point of 156.6°C, and is distributed across North America, Central/South America, Western Europe, Eastern Europe, Australasia, Asia, the Middle East, and Africa.