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Chemical properties of titanium dioxide

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Titanium dioxide is extremely stable chemical properties and it is an acidic amphoteric oxide. At room temperature almost no other elements and compounds react with oxygen, ammonia, nitrogen, hydrogen sulfide, carbon dioxide, sulfur dioxide does not work, do not dissolve in water, fat, not soluble in dilute acid and inorganic acids, alkalis, only dissolved hydrogen hydrofluoric acid. However, in the light effect, titanium dioxide can occur consecutive redox reactions, with the photochemical activity. This is kind of photochemical activity under UV irradiation anatase titanium dioxide is particularly evident, even if the nature of titanium dioxide photosensitive oxidation catalyst certain inorganic compounds, but also certain organic photosensitive reduction catalyst.

(source:http://www.nurchem.com/chemical-properties-of-titanium-dioxide/)

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