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Colloidal silica, also known as silica sol, is a chemical compound consisting of silicon and oxygen atoms in the form of nanometre-sized particles that are dissolved in an aqueous dispersion and, due to their size, float in the liquid instead of settling. The silicon dioxide particles (SiO₂) have large specific surface areas, small particle sizes, high purity and stability. MATSEN CHEMIE AG offers a wide range of variants and options for a variety of applications. Colloidal silica is used as a polishing agent in the electronics and semiconductor industry, as a clarifying agent in wine and beer production, in the chemical industry as a carrier substance for catalysts, in the paper industry in the production of paper sacks and much more.