Also known as Silicon Dioxide, Silica is found in ample amounts in the Earth’s crust. In fact, it is the second most abundant element on Earth after oxygen and is also found in living organisms. It is either a crystal that is colorless or a white powder that is tasteless and odorless. The chemical formula of Silica is SiO2. Silica is most commonly used in cosmetic and skincare products as it improves the feel and texture of the formulations. Silica is a multi-functional ingredient and has a lot of different functions. It acts as an absorbing agent, bulking agent, anti-caking agent, and as abrasive in scrubs.
Origin
Silica is a mineral that occurs naturally on the Earth's surface in clays, sandstones, granites, and also in some parts of animals and plants. However, the Silica used in cosmetics is generally made synthetically by the combustion of silicon tetrachloride in hydrogen furnaces.
Safety profile
Silica is regarded as safe for use in cosmetics if used in small concentrations. However, a patch test is recommended prior to full application. Since it has absorbing properties, in certain skin types it can absorb too much moisture and oil, leaving the skin feeling dry. Further, this ingredient is halal and safe for the environment. It is safe for animals such as dogs as well unless ingested by them.