Silicon dioxide is widely used in various personal care products, such as skincare products, sunscreen, makeup, antiperspirants, hair care products, shower gel, facial cleansers, etc. The particle shape of ordinary silica is spherical or nearly spherical, and the particle size is usually 1-100 micrometers. It will scatter and refract light under illumination, with limited reflectivity and covering power.

In liquid products, silica can play a role in thickening and thixotropic properties, while in powdered products, it can improve fluidity and storage stability, thereby playing an anti caking role. Meanwhile, due to its high specific surface area, silica can also act as an adsorbent and carrier, capable of adsorbing gases, liquids, and solids.