CI 77891; titanium white.
UV filter, pigment, opacity agent, coverage support.
Sunscreens, foundations, powders, tinted moisturizers, and body products.
Product claims, region, particle treatment, and finished-product testing.
Common roles
In sunscreen, titanium dioxide can be part of the UV filter system. In makeup and some skin care, it may be used for opacity, color, or coverage.
Start with product type
A sunscreen, foundation, powder, and moisturizer use the ingredient in different contexts. Check whether the product makes sun protection claims and which market it is sold in.
Texture and appearance
Titanium dioxide can influence opacity, white cast, coverage, and finish. The final effect depends on particle treatment, dispersion, other powders, and the overall formula.
Ingredient list limits
The label cannot show particle size, coating, dispersion quality, or SPF testing. For sunscreen performance, rely on finished-product claims and correct use.
Practical reader checklist
Use this ingredient page as a sequence, not as a score. First confirm the product type and area of use. Then look at where the ingredient appears, which function group it belongs to, and whether nearby ingredients change the likely role. Finally, compare the label with your own routine: frequency, layering, climate, cleansing step, and any repeated reactions.
| Question | Why it matters | Useful next step |
|---|---|---|
| Is the product rinse-off or leave-on? | Contact time changes how much the ingredient matters. | Read category guides before making a preference rule. |
| Is this a base ingredient or a claim ingredient? | Some names mainly shape texture, while others support a front-label claim. | Check surrounding humectants, emollients, preservatives, fragrance, and actives. |
| Have I reacted to a similar formula before? | Personal history is more useful than a universal rating. | Record the full product and routine, not only one ingredient. |
What this page cannot tell you
No ingredient dossier can show exact concentration, raw material grade, processing method, finished-product stability, packaging compatibility, preservative challenge testing, or your own tolerance. Treat the dossier as a way to narrow the next check, then return to the original label and current product version.
After reading the method, open the iOS app to review product records, ingredient tables, source notes, and personal preference profiles.