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3. Solubility: insoluble in water.

Titanium dioxide is often used as a UV absorber and pigment in cosmetic products, such as foundations, lipsticks, creams, sunscreens and other skin care products. It helps protect the skin from the harmful effects of UV rays by blocking them, while providing a brightening effect.

When E171 is part of a food product, it passes through the digestive system without causing harm because E171 combines with the other ingredients.