OXYDE DE ZINC ENDUIT D'OXYDE DE SILICIUM ET PROCÉDÉ POUR LE PRÉPARER, COMPOSITION CONTENANT DE L'OXYDE DE ZINC ENDUIT D'OXYDE DE SILICIUM, ET MATÉRIAU COSMÉTIQUE CONTENANT DE L'OXYDE DE ZINC ENDUIT D'OXYDE DE SILICIUM
The present invention provides silicon oxide-coated zinc oxide in which, in a silica coating formed of a silicate alkali metal salt, the elution of zinc ions is suppressed, a method for preparing the same, a composition containing silicon oxide-coated zinc oxide, and a cosmetic material. The silicon oxide-coated zinc oxide of the present invention is silicon oxide-coated zinc oxide formed by coating surfaces of zinc oxide particles with a silicon oxide coating, in which an average primary particle diameter of the zinc oxide particles is more than 50 nm and 500 nm or less, and when held in a buffer solution having a pH of 5 for 1 hour, an elution ratio S of the zinc oxide defined by following Expression (1) is 50% or less. Elution ratio S = amount of eluted zinc oxide / amount of zinc oxide in silicon oxide ˆ’ coated zinc oxide
