What type of formulation is reduced in exposure risk but abrasive to pump parts?

The correct answer pertains to formulations that are specifically designed to minimize exposure risk while presenting some challenges in terms of abrasiveness to pump components. Flowables are liquid formulations that are designed to reduce dust formation and airborne exposure, which can be particularly hazardous for applicators and workers. This cutting down on dust exposure makes them safer and more user-friendly in handling.

However, the nature of flowables often involves the use of solid active ingredients suspended in liquid. This suspension can lead to the presence of abrasive particles, which, while reducing exposure risk for individuals applying the product, can wear down pump parts over time. This wear and tear occurs as the pump handles these abrasive particles repeatedly during application.

In contrast, other options like dry flowables and wettable powders might not reduce exposure risk to the same extent due to their potential to create dust, while soluble powders could be less abrasive but do not involve the same safety management in terms of exposure during application. Thus, the characterization of flowables makes them distinct in their approach to safety and performance, leading to their classification as reduced in exposure risk but abrasive to equipment.