Following six months of phasing out the additive, titanium dioxide will be completely banned in the European Union starting August 7. France had previously banned the use of titanium dioxide in food starting in January 2020.

In 1970, Japanese scholars studied the phase diagram of iron oxide microcrystalline formation, which laid a theoretical foundation for the preparation method of iron oxide yellow crystal seed. According to the research results, iron yellow crystal seeds can be formed under acidic or alkaline conditions. Because iron yellow is a crystal structure, in order to crystallize into pigment particles, it must first form crystal nucleus and become crystal seed, and then the crystal nucleus grows into iron yellow. Otherwise, only thin and dim color paste can be obtained, which does not have pigment properties. Acid process can be divided into iron sheet process and drop addition process.

A Lawsuit Claims Skittles Are Unfit for Consumption. Experts Weigh in, by Rachel Rabkin Peachman, The New York Times, July 26, 2022