A natural white pigment that occurs in several varieties of crystal forms. It remains on the surface of the skin, scattering UV light; therefore, has a natural sunblocking
ability and is used both to deflect ultraviolet rays and to cover flaws on the skin. Titanium dioxide blocks some UVA and Zinc oxide blocks more UV radiation than any other single ingredient. Titanium Dioxide ... in a super fine powder ...  It is safe to use on children. When buying a sunscreen you should get at least an SPF 15 and preferably one that contains zinc oxide.