Hebei Caixin Material Technology Co., LTD., formerly established in 2005, is located in the core of Beijing-Tianjin-Hebei City cluster, close to Tianjin Port, the largest port in the north, with developed transportation and outstanding people. After the continuous efforts of Caiqing people, has accumulated assets for the company of nearly 200 million, nearly 1,000 employees, Caiqing technology has become the pigment titanium dioxide research and development, production, sales and import and export trade in one of the large company, we integrate industry resources, to provide personalized customized services for global customers. We adhere to the market-oriented, good faith as the principle, is committed to open up a diversified international market, for the world customers to provide quality products, efficient service, is our unremitting pursuit. We sincerely invite customers from all over the world to visit our company.

The raw material used in this method is FeSO4. In order to maintain the Fe3 + concentration in the reaction medium in a specific range, reducing agent iron sheet is added in the reaction process. Iron yellow crystal seed was added and air was introduced to synthesize iron yellow under certain pH conditions. The method mainly includes two steps: (1) firstly, FeSO4 · 7H2O is used as raw material, NaOH or NH3 · H2O is used as precipitant or pH regulator, and air is used as oxidant to prepare crystal seed; (2) Iron yellow is produced by two-step oxidation with crystal seed, FeSO4, iron sheet and air.

In summary, the Food Directorate's position is that there is no conclusive scientific evidence that the food additive TiO₂ is a concern for human health. This is based on a review of the available scientific data relevant to food uses of TiO₂. However, we will continue to monitor the emerging science on the safety of TiO₂ as a food additive and may revisit our position if new scientific information becomes available.

≤0.3

“Unlike some other chemicals used in food, titanium dioxide has no nutritive, preservative, or food safety function—its use is purely cosmetic,” said CSPI principal scientist for additives and supplements, Thomas Galligan. “The prospect of titanium dioxide nanoparticles damaging DNA is concerning enough for us to recommend consumers avoid foods that have it.” 

This cytotoxic effect was also reported before; i.e. Natarajan et al. conducted an experiment that found a strong oxidative stress, morphological changes in mitochondria and substantial loss in the fusion of primary hepatocytes exposed to P25TiO₂NPs [52].

EFSA's evaluation is related to the risks of TiO₂ used as a food additive, not to other uses.

Lithopone was discovered in the 1870s by DuPont. It was manufactured by Krebs Pigments and Chemical Company and other companies. The material came in different seals, which varied in the content of zinc sulfide. Gold seal and Bronze seals contain 40-50% zinc sulfide, offering more hiding power and strength. Although its popularity peaked around 1920, approximately 223,352 tons were produced in 1990. It is mainly used in paints, putty, and in plastics.