Abstract: A method for making a suspension, dispersion or emulsion of non-agglomerated particles comprising forming particles in a liquid medium, wherein sonic energy is applied to the liquid medium at the point of contact of the reactants during the particle forming step to produce the suspension, dispersion or emulsion of non-agglomerated particles. The invention is also directed to a method for making a suspension of non-agglomerated pyrithione salt particles, comprising the steps of forming pyrithione salt particles in a liquid medium, wherein sonic energy is applied to the liquid medium during the forming step to produce the suspension of non-agglomerated pyrithione salt particles.