The present invention relates to a titanium dioxide-niacinamide composite having ultraviolet light blocking and whitening effect and a use thereof, and more particularly, to a titanium dioxide-niacinamide composite having titanium dioxide and niacinamide, To prevent the skin from becoming opaque, to prevent photocatalytic action of titanium dioxide and to inhibit the generation of active oxygen to prevent aging of the skin, and to prevent the aging of the skin by the titanium dioxide and the niacinamide By covalent bonding, it is possible to prevent the amine groups of niacinamide from being separated, to maintain the whitening effect of niacinamide, and to impart moisturizing properties to the skin by the hydrophilic nature of niacinamide, thereby preventing clogging of pores and suppressing skin troubles Titanium Dioxide with UV Protection and Whitening Effect It relates to a polyamide conjugate and its use.The present invention also relates to a method for producing a titanium dioxide-niacinamide complex having an ultraviolet blocking and whitening effect, and more particularly, to a titanium dioxide dispersion prepared by adding a sodium hydroxide solution as a catalyst to the titanium dioxide dispersion, The present invention also relates to a method for producing a titanium dioxide-niacinamide composite having an ultraviolet blocking and whitening effect by covalent bonding of titanium dioxide and niacinamide by charging and stirring with a haniacinamide.The present invention also provides a titanium dioxide-niacinamide complex having a UV-blocking and whitening effect, wherein the spherical titanium dioxide and niacinamide covalently bond to each other.[Formula 1]The present invention also provides a method for producing a titanium dioxide dispersion, comprising the steps of: (S10) preparing a titanium dioxide dispersion (S20) stirring and stirring the titanium dioxide dispersion with a sodium hydroxide solution (S30) heating and stirring the mixture, heating
