Description
ZINC OXIDE (NANO) is the nanoparticulate form of zinc oxide, an inorganic compound belonging to the class of metal oxides.
The ingredient is listed in Annex VI, reference 30a, of Regulation (EC) No 1223/2009. The maximum authorized concentration is 25%, with the literal clarification: "In case of combined use of zinc oxide and zinc oxide (nano), the sum shall not exceed the limit of 25%". The conditions of use include the mandatory labelling warnings: "Not to be used in applications that may lead to exposure of the end-user's lungs by inhalation. Only nanomaterials having the following characteristics are allowed: — purity ≥ 96 %, with wurtzite crystalline structure and physical appearance as clusters that are rod-like, star-like and/or isometric shapes, with impurities consisting only of carbon dioxide and water, whilst any other impurities are less than 1 % in total, — median diameter of the particle number size distribution D50 (50 % of the number below this diameter) > 30 nm and D1 (1 % below this size) > 20 nm, — water solubility < 50 mg/L —uncoated, or coated with triethoxycaprylylsilane, dimethicone, dimethoxydiphenylsilanetriethoxycaprylylsilane cross-polymer, or octyl triethoxy silane."
The information presented is for technical reference only and does not constitute a recommendation for use or an efficacy claim.