Silicon tetrachloride (SiCl4) is a chlorosilane which is formed by reaction of metallurgical silicon with hydrogen chloride or chlorine.
Silicon tetrachloride is used in large scale for the production of pyrogenic silica. In addition, it is used for crosslinking styrene-butadiene-rubber (SBR) and for production of silicic acid esters and ester hydrolysates. The corresponding Evonik products are marketed under the Siridion® trademark. High-purity silicon tetrachloride is used in the manufacturing of optical fibres, fused silica tubes and other fused silica articles and as precursor in semiconductor munufacturing processes.