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.

The spherical, small particle size, and porous properties of silica make it an anti caking agent and thickener in the cosmetics field, which can improve storage stability and dispersion of powdered products, and is widely used.