Amorphous aqueous TiO2 sol is a dispersion of very small TiO2 nanoparticles in H2O with neutral pH. The sol is electrostatically stable, without any carbon containing dispersing agents. It forms uniform and adhering films due to the highly sol-gel active surface of nanoparticles. Particles are highly charged egattively, and if added to some dispersions may considerably improve electrostatic stability of the colloid.