A(n) _____ is a substance that can cause visible and possibly irreversible permanent damage to the skin or eye.

• A. Caustic
• B. Irritant
• C. Corrosive
• D. Toxic

Answer: (C)

Corrosive describes a chemical that can destroy living tissue on contact, causing visible and often irreversible damage to skin or eyes. This kind of damage comes from a chemical reaction with the tissue, not just irritation. An irritant would cause reversible discomfort or redness, not permanent injury. Toxic refers to harm from systemic exposure, affecting the body as a whole rather than causing immediate local tissue destruction. Caustic is sometimes used loosely, but corrosive is the standard term for substances that can permanently damage skin or eyes, making it the best fit for this description. When working with corrosives, always use proper protective equipment and rinse immediately if contact occurs.