SiSiB® Chlorosilanes are a group of reactive, chlorine-containing silicon compounds. Each such compound has at least one silicon-chlorine bond. Usually chlorosilanes are intermediates used to produce siloxanes and silanes, also used as protecting agent for intermediates in pharmaceutical syntheses. Most of chlorosilanes are clear liquids that react with water to form corrosive and toxic hydrogen chloride gas and hydrochloric acid.