Which of the following formulations is least likely to contribute to inhalation exposure during loading?

Granular formulations are typically the least likely to contribute to inhalation exposure during loading. This is primarily because granular products consist of larger, heavier particles that tend to settle quickly and do not become airborne to the same extent as finer formulations like aerosols, wettable powders, or dry flowables.

In contrast, dry flowables and wettable powders contain very fine particles that can easily become airborne during the process of being loaded, potentially leading to inhalation exposure. Aerosol formulations are specifically designed to be dispersed in the air, making them significantly more likely to be inhaled during application. Therefore, the granular formulation represents a safer option in terms of minimizing respiratory exposure while handling during loading.