Which pesticide formulation process involves solid particles being dispersed in a liquid?

The process of dispersing solid particles in a liquid is referred to as a suspension. In this formulation, the solid particles are not dissolved but rather remain distributed throughout the liquid. This means that the particles can settle to the bottom over time if the mixture is allowed to sit, which is characteristic of suspensions.

Suspensions are commonly used for pesticide applications because they allow for the effective delivery of active ingredients that are not soluble in the carrier liquid. This method enables the active ingredients to be uniformly distributed in the spray mixture, ensuring that they can be applied evenly to the target area. Users must often agitate or shake the container before use to ensure that the solid particles are properly suspended and evenly mixed in the liquid.

In contrast, emulsions involve the mixing of two immiscible liquids, with one liquid dispersed in the other, typically requiring an emulsifying agent. Solutions involve a solute that is fully dissolved in a solvent, resulting in a homogeneous mixture. Concentration refers more to the amount of active ingredient in a given volume or weight of the product, rather than a specific formulation process. Thus, the correct identification of suspension highlights its unique characteristic of distributing solid particles within a liquid medium.