china 94% tio2 rutile grade titanium dioxide

Nano-sized TiO2 generally shows low or no acute toxicity in both invertebrates and vertebrates. However, exposure of Daphnia magna to 20 ppm TiO2 for 8 consecutive days was found to cause 40 % mortality. Zhu et al. showed minimal toxicity to D. magna after 48 h exposure, while upon chronic exposure for 21 days, D. magna suffered severe growth retardation and mortality. A significant amount of nano-sized TiO2 was found also accumulated in the body of the animals. Similar findings with coated nano-sized TiO2 (T-Lite™ SF, T-Lite™ SF-S and T-Lite™ MAX; BASF SE) were reported by Wiench et al. Biochemical measurements showed that exposure to TiO2 NPs induces significant concentration-dependent antioxidant enzyme activities in D. magna. Lee et al. showed that 7 and 20 nm-sized TiO2 induced no genotoxic effect in D. magna and in the larva of the aquatic midge Chironomus riparius.

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The photocatalytic properties of titanium dioxide are particularly interesting. When exposed to ultraviolet radiation, TiO2 can catalyze reactions that decompose organic compounds, leading to its use in self-cleaning surfaces and air purification systems When exposed to ultraviolet radiation, TiO2 can catalyze reactions that decompose organic compounds, leading to its use in self-cleaning surfaces and air purification systems When exposed to ultraviolet radiation, TiO2 can catalyze reactions that decompose organic compounds, leading to its use in self-cleaning surfaces and air purification systems When exposed to ultraviolet radiation, TiO2 can catalyze reactions that decompose organic compounds, leading to its use in self-cleaning surfaces and air purification systemschemical titanium dioxide. This property is utilized in construction materials like concrete and glass, where the titanium dioxide helps to break down pollutants and reduce maintenance requirements.

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Should a grade of lithopone be desired higher than the standard grade and another by-productas, for example, a forty-five*per= cent. grade of lithopone and barium chlorid the following process may be pi'acticed,\vhich, however, is quite analogous to the one already 10o described. Aqueous solutions of the ingredients are prepared as before, in these proportions: zinc sulfate, one hundred and sixty-one pounds; zinc chlorid, one hundred and thirty-six pounds, and barium sulfid, three hundred and thirty-eight pounds. Upon mixing these several solutions the lithopone will at once be precipitated in accordance with the following reaction:

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