titanium dioxide rutile pigment white powder r-996 rutile (titanium dioxide) /lomon钛白粉金

Lithopone, a zinc sulfide-based pigment, has been widely used in various industries due to its excellent whiteness, opacity, and chemical stability. Among the various grades of lithopone, 28B301 and 30B311 are particularly popular among manufacturers. In this article, we will provide a comprehensive guide on these two grades, including their properties, applications, and manufacturing processes.

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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].

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{随机栏目} 2025-08-14 07:00 2910