titanium dioxide on laboratory spatula, tio2 on dark surface. white chemical powder. food additive e171. titanium dioxide used in

titanium dioxide food additive e171 dry powder white spatula oxide chemical alimentary pigment titania phosphonic acid toothpastes formula tio2 pw6 77891 coloring number black lab consumption synthetic pure catalysts adsorption paints cosmetic products thickener crystal alumina silica thickening agent carcinogen banned zinc colorants ingredient chemistry laboratory molecular nutritional supplement dark surface used skin care surface powder e171 toothpastes