PROBLEM TO BE SOLVED: To provide an ultraviolet-shielding particle coated with silicon oxide that can exhibit desired ultraviolet-shielding properties even when applied to an aqueous cosmetic, an aqueous composition containing an ultraviolet-shielding particle coated with silicon oxide and a cosmetic containing the same.SOLUTION: Provided is an ultraviolet-shielding particle coated with silicon oxide, in which the surface of an ultraviolet-shielding particle is coated with a silicon oxide film. At least one functional group selected from the group consisting of an alkyl group, an alkenyl group, and a cycloalkyl group is present on the surface of the silicon oxide film, and the content of the functional group is 0.001-0.30 mass% inclusive.SELECTED DRAWING: None【課題】水系の化粧料に適用されても、所望の紫外線遮蔽性が得られる酸化ケイ素被覆紫外線遮蔽粒子、酸化ケイ素被覆紫外線遮蔽粒子含有水系組成物およびそれを含む化粧料を提供する。【解決手段】本発明の酸化ケイ素被覆紫外線遮蔽粒子は、紫外線遮蔽粒子の表面が酸化ケイ素被膜で被覆されてなり、前記酸化ケイ素被膜の表面に、アルキル基、アルケニル基およびシクロアルキル基からなる群から選択される少なくとも1種の官能基が存在し、前記官能基の含有量が0.01質量%以上かつ0.30質量%以下である。【選択図】なし
