Sifrui (Tianjin sifrui / Handan sifrui / Zhengzhou sifrui / Wuhan sifrui / Qingdao sifrui) is headquartered in Tianjin, an advanced manufacturing R & D base known as the Pearl of the Bohai Sea. The company is a new technology development reagent company integrating R & D, production and sales, focusing on the production and R & D of high-purity solvent, Karl Fischer reagent and chromatographic sol...