The acute toxicity of acetic acid is low. The immediate toxic effects of acetic acid are due to its corrosive action and dehydration of tissues with which it comes in contact. Acetic acid has not been found to be carcinogenic or to show reproductive or developmental toxicity in humans.
Heating can release vapors that can be ignited.
Carbon dioxide or dry chemical extinguishers should be used for acetic acid fires. Reactivity and Incompatibility Contact with strong oxidizers may cause fire. In particular, acetic acid should be used only in areas free of ignition sources, and quantities greater than 1 liter should be stored in tightly sealed metal containers in areas separate from oxidizers. In the event of skin contact, immediately wash with soap and water and remove contaminated clothing. If acetic acid is ingested, obtain medical attention immediately.