The product that Yunjingfei manufactured is ultra-pure germanium tetrachloride(Chemical Formula:GeCl₄).It is a colorless volatile liquid,and is easily soluble in water.By adopting its exclusive rectification and extraction technology,the Hydrogen-containing impurities of ultra-pure germanium tetrachloride are less than 1ppm,and mental impurity is less than 5ppb,which make the purity of ultra-pure germanium tetrachloride reaches 99.999999%.

Currently,ultra-pure germanium tetrachloride is mainly used in optical communication materials,especially in the dopant of optical fiber preforms which are used to improve refractive index of fiber core and to reduce the dispersion of optical fiber and transmission loss.Unlike ordinary germanium tetrachloride products,the ultra-pure germanium tetrachloride Yunjingfei manufactured has higher purity.Optical fibers that added with ultra-pure germanium tetrachloride produced by Yunjingfei have the quality of high transmission capacity,high refractive rate,low dispersion,low energy loss,strong resistant to nuclear radiation and electromagnetic radiation,all-weather working capacity and so on.All these advantages have greatly improve the performance and quality of optical fibers.Apart from using in optical communication materials,another function of ultra-pure germanium tetrachloride is to manufacture ultra-pure germanium dioxide.