CI 77891

CI 77891 is titanium dioxide, a naturally occurring mineral compound that serves as a cosmetic colorant and opacifying agent. In skincare products, it appears as a fine white powder that remains largely on the skin's surface rather than penetrating deeper layers.This ingredient is included in formulations primarily to create visual coverage, improve product aesthetics, and in some cases provide a light-diffusing effect. It is one of the most widely used mineral pigments in cosmetics and is approved for use in skincare across major regulatory bodies.

Titanium dioxide works primarily through physical opacification. The fine particles sit on the skin's surface and scatter light, creating a more uniform appearance and a gentle blurring effect. This is a passive mechanism rather than an active treatment mechanism.Unlike chemical sunscreen filters, titanium dioxide reflects and scatters UV radiation through physical means, which is why it is also used in mineral sunscreens. However, in non-sun protection skincare products, its primary function is cosmetic rather than protective.

This ingredient requires no special application technique — it is incorporated into products during formulation. Simply apply your product as directed by the manufacturer. If using a product containing titanium dioxide, be aware that it may leave a white cast on deeper skin tones, particularly at higher concentrations. Patch testing is advisable if you have known sensitivities to mineral pigments, though reactions are uncommon.

Titanium dioxide is considered safe for topical use in skincare products and has a strong regulatory approval history. It is non-irritating for the vast majority of users, though individuals with specific sensitivities to mineral pigments should perform a patch test first.