Which white pigment has Colour Index name CI 77891 in cosmetics?

Titanium dioxide is the white pigment identified by Colour Index number CI 77891 in cosmetics. It is also known as titanium(IV) oxide, titania, titanium white, or Pigment White 6.

Its strong opacity and exceptionally high refractive index let small amounts produce a bright, covering white. Cosmetic formulas use it in products such as face powders, foundations, concealers, eye makeup, toothpaste, and some sunscreens. Depending on the product, it may function as a colourant, opacifier, or ultraviolet filter.

A common mix-up is zinc oxide, another white cosmetic pigment and UV-filter ingredient. Zinc oxide has a different Colour Index number, CI 77947. Talc and kaolin can also appear in powders, but they are mineral fillers or absorbents rather than the pigment designated CI 77891.

The same compound has uses far beyond beauty: it is a major industrial white pigment in paints, plastics, paper, and coatings. Its mineral forms include rutile, anatase, and brookite, with rutile commonly valued for its optical performance.