china white precipitate of titanium dioxide

For exterior wall paint materials, titanium dioxide plays a critical role in enhancing weather resistance. Its ultraviolet (UV) light absorption characteristics protect the binder system from degradation caused by sunlight exposure. As a result, paints containing titanium dioxide are less likely to fade, chalk, or crack under harsh environmental conditions. Moreover, its chemical stability prevents the pigment from reacting with other paint components, maintaining the integrity of the coating and extending its lifespan.

...
...

On the other hand, the U.S. Food and Drug Administration (FDA) in their Final Administrative Order on Sunscreen Drug Products posted in September 2021 still accepts titanium dioxide up to 25% in the list of Generally Recognized As Safe and Effective (GRASE) in the main document, without further clarification on what kind or size of particles [9]. However, on page 24 (Sunscreen containing nanomaterials) FDA clearly “distinguish nanomaterials from other forms of these ingredients'' (zinc oxide and titanium dioxide) and ask for comments on “any particular nanomaterials that you believe should not be permitted for use in OTC sunscreen products”. To the best of our knowledge, this Agency did not ban the use of nanoparticulate titanium dioxide in any form, even though it is mentioned on page 34 that the anatase form is the more photoactive one, due to the lack of evidence with real sunscreens OTC (over the counter) in vivo. Moreover, other regulations in Latin America (MERCOSUR agreement, 2006) do not state clearly their position on the use of nanoparticulate TiO2NPs [10].

...

Furthermore, chemical pigment manufacturers need to stay abreast of the latest technological advancements and innovations in the field
chemical
chemical pigment manufacturers. By investing in research and development, they can discover new pigments with unique properties and characteristics that can open up new opportunities and markets. For example, the development of special effect pigments, such as pearlescent or fluorescent pigments, has revolutionized the cosmetics and automotive industries, offering new possibilities for creative and eye-catching designs.

...