Inorganic UV filter is there to absorb, reflect, scatter and block UVA and UVB radiation. They are formulated into cosmetic products to protect skin from the damage of sunlight such as tanning, inflammation, burning, photoaging, even carcinogenicity.

No matter whether Titanium dioxide or zinc oxide is used in formulations, not as individual crystal particles but as aggregates of base particles. The degree of aggregation is related to the base particle size and the production process. Excessive aggregation reduces the UV protection of the formula and scatters visible light, causing the formula to become white when applied to the skin.

Zinc oxide is one of the most widely used inorganic sunscreens, blocking UVA and UVB radiation, safe and hypoallergenic.