Isododecane is an important ingredient in cosmetics. It can be used as an emulsifier for pastes in cosmetic products to help mix water and oil-based ingredients together to achieve a uniform distribution and texture of the product. Since it is colorless, tasteless and odorless, it does not affect the aroma or color of the cosmetic. It is used as a cosmetic solvent to make the product fresh, easy to wipe, and can reduce and prevent the outflow of water from the skin. In addition, due to its stability, isododecane is often used as a solvent for chemical reactions. In analytical chemistry, it is also commonly used as an internal standard to determine the yield and conversion rate of a reaction, and a known concentration of Isododecane can be added to the analytical sample to correct the analytical data and ensure accuracy.