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In beauty and personal care products, the ingredient is listed with its colour index (CI) number ‘CI 77891’. When nano grade titanium dioxide is used in our sunscreens, this is referenced as ‘titanium dioxide’ [nano] in the ingredients list.

99% Min
Titanium dioxide particles help light scatter and reflect, Kelly Johnson-Arbor, MD, a medical toxicology physician at the National Capital Poison Center, told Health. Because of that, we often use it as a whitening agent.
Overwhelmingly, research that’s relevant to human eating patterns shows us that E171 is safe when ingested normally through foods and drugs (1,2).
Titanium dioxide manufacturer: CHTI


To be added to food, this additive must achieve 99% purity. However, this leaves room for small amounts of potential contaminants like lead, arsenic, or mercury (1Trusted Source).
Par ailleurs, dès lors que l'on recherche une certain transparence dans les travaux artistiques, son pouvoir opacifiant et son pouvoir dégradant des couleurs pas trop élevés le désignent pour remplacer le dioxyde de titane trop opaque et trop dégradant (§ Des Liants et des couleurs aux éditions EREC)