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Heading 2823 : Titanium oxides.
The only titanium oxide of commercial interest is titanium dioxide or titanic anhydride (TiO2), which gives the titanates of heading 28.41.
It is an amorphous powder, specific gravity about 4; white but turns yellow when heated.
This heading covers titanium dioxide that is not mixed or surface-treated, but it excludes titanium dioxide to which compounds have been intentionally added during the production process in order to obtain certain physical properties rendering it suitable for use as a pigment (heading 32.06) or for other purposes (e.g., headings 38.15, 38.24).
The heading further excludes :(a) Natural titanium dioxide (rutile, anatase, brookite), an ore (heading 26.14). (b) Orthotitanic acid (Ti(OH)4) and metatitanic acid (TiO(OH)2) (heading 28.25).
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