| abstract |
(57) [Problem] To provide a cerium oxide which has a high ultraviolet blocking effect, has transparency, and has a reduced catalytic activity. The cerium oxide includes Zn 2+ , Fe 3+ , C A metal oxide-dissolved cerium oxide formed by dissolving one or more metal ions selected from o 2+ and Ni 2+ . This metal oxide solid solution cerium oxide has a temperature of 60 ℃ below, pH 5 or more, cerium salt aqueous solution, It is produced by reacting an aqueous solution of one or more metal ions of metal ions selected from Zn 2+ , Fe 3+ , Co 2+ and Ni 2+ , an alkali, and an oxidizing agent. Further, this metal oxide solid solution cerium oxide can be blended with a resin composition or cosmetics to exert an ultraviolet ray blocking effect. |