The most common exposure route to a chemical is through the

• A. Inhalation
• B. Dermal
• C. Skin/Dermal
• D. Ingestion

Answer: (C)

Dermal exposure is typically the most common route because skin is the primary surface people touch during handling of chemicals. When workers rinse, mix, measure, or apply pesticides, residues end up on hands, arms, and clothing, and the skin can absorb many chemicals, especially with longer contact or repeated exposure. This everyday contact often happens before any airborne mist is inhaled or before someone swallows residues that might be on a hand-to-mouth surface, making skin contact a frequent pathway for uptake. The extent of dermal absorption depends on the chemical’s properties, how long the skin is in contact, and the condition of the skin, but overall skin exposure tends to outpace inhalation or ingestion in many work situations. Wearing appropriate protective gear, maintaining good hygiene, and decontaminating promptly help reduce this common route.