Which formulation process involves the dispersion of solid particles in a liquid?

The formulation process that involves the dispersion of solid particles in a liquid is a suspension. In a suspension, solid particles are evenly distributed throughout a liquid medium, but these particles do not dissolve. This is significant because suspensions can be used in pesticide formulations to ensure that active ingredients remain effective while being applied.

In contrast, an emulsion involves the mixing of two immiscible liquids, such as oil and water. A solution is a homogeneous mixture where a solute is completely dissolved in a solvent, resulting in no visible solid particles. Concentration typically refers to the amount of solute present in a solution rather than a specific formulation process. Thus, suspensions are crucial in the pesticide industry for delivering active ingredients while maintaining their effectiveness in the application process.