Cosmetic silica is a type of processed silica with unique forms and properties. Its particle morphology is an irregular polyhedron or fiber like shape, with particle sizes mostly ranging from 0.1 to 10 microns. This form of silica has higher reflectivity and covering power. In the field of cosmetics and other fields, cosmetic silica is used as an efficient optical whitening agent and covering agent, which can effectively improve the color and texture of products.

Another important characteristic of silicon dioxide is its strong ability to reflect ultraviolet light, good stability, and ability to not decompose or change color after being exposed to ultraviolet radiation. It also does not react chemically with other components in the formula. Therefore, silica has played a good foundational role in the upgrading and replacement of sunscreen cosmetics.