china tr 92 titanium dioxide

The production of lithopone is associated with several environmental concerns, including air and water pollution. Zinc sulfide ore mining can lead to soil erosion and habitat destruction, while sulfuric acid leaching and calcination processes can release pollutants into the air and water. To address these issues, many Chinese lithopone factories have implemented environmental protection measures such as wastewater treatment and emission reduction technologies.

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In the world of manufacturing, the combination of talc and titanium dioxide is a match made in heaven. These two minerals, when used together, can significantly enhance the performance and quality of various products. Talc, known for its softness and lubricating properties, provides excellent slip resistance and reduces friction, making it an ideal additive for plastics, rubber, and coatings. Titanium dioxide, on the other hand, is a powerful pigment that imparts strength, durability, and UV protection to products.

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At the present JECFA meeting, the committee considered additional toxicological studies relevant to the safety assessment of the chemical that investigated its toxicokinetics, acute toxicity, short-term toxicity, long-term toxicity and carcinogenicity, genotoxicity, and reproductive and developmental toxicity, as well as special studies addressing its short-term initiation/promotion potential for colon cancer. The experts acknowledged that a large number of toxicological studies have been conducted using test materials, including nanoparticles, having size distributions and physico-chemical properties not comparable to real-world uses of titanium dioxide as a food additive. The studies on non-representative materials were evaluated by JECFA, but the committee concluded that such studies are not relevant to the safety assessment of the additive.

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