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3100 is an untreated and uncoated anatase Titanium Dioxide easy dispersed pigment, pigmentation of foodstuffs, cosmetics, pharmaceuticals, etc.
link:https://www.peijinchem.com/titanium-dioxide/titanium-dioxide-pharm-grade/pharm-grade-uncoated-anatase-tio2-3100.html
Titanium Dioxide 3100 Pharm Food Cosmetic Grade