Texas Pesticide Applicator Practice Exam

Which pesticide solution is most likely to be absorbed through the skin?

1. Dry

2. Water-based

3. Oil-based

4. Aqueous

The correct answer is: Oil-based

Oil-based pesticide solutions are most likely to be absorbed through the skin due to their chemical properties. Oil-based formulations tend to have a higher affinity for lipids, which are found in the skin's outer layer. This lipid affinity allows the active ingredients in oil-based pesticides to penetrate the skin more effectively than those in dry or water-based formulations. Water-based solutions generally have a higher water structure and lower oil content, which can limit their ability to permeate the skin barrier. Aqueous solutions, while similar, typically consist of dissolved substances in water and exhibit properties more akin to water-based formulations. In contrast, the lipid-soluble nature of oil-based products enhances their potential for dermal absorption, presenting a greater risk in occupational and applicator settings. Understanding this property is crucial for ensuring safe handling and application of pesticides to minimize health risks.