What is dermal absorption?

• A. Inhalation of vapors
• B. The intake of a substance through the skin.
• C. Absorption through leaves
• D. Ingestion via mouth

Answer: (B)

Dermal absorption is the intake of a substance through the skin. It matters with pesticides because skin contact with treated materials, spills, or drift can allow chemicals to penetrate the outer skin layers and enter the bloodstream. How much gets absorbed depends on the chemical’s properties (likelihood to dissolve in skin lipids and its molecular size), the formulation, how long the skin is in contact, and the condition of the skin (damaged or sweaty skin can increase absorption). The skin acts as a protective barrier, so protective gloves and minimizing contact reduce this exposure route. This is different from inhalation (breathing in vapors), ingestion (eating or drinking), or other routes like absorption through leaves.