Acids are found in several household cleaning compounds, pool chemicals, solvents, wet cell batteries, and radiator flushers and cleaners. Acids, which have a pH range of 0 to 6.9, may be corrosive and produce severe burns on contact. Vinegar, which contains four to six percent acetic acid, is generally considered nontoxic.

Skin contact with acid may produce severe pain and risk of secondary infection and scarring. Chronic skin exposure to acids may cause mild irritation, dermatitis, or roughened skin. Inhalation of fumes may produce nose and throat irritation, coughing, chest pain, and even pulmonary edema.
When working with household products containing acids, wear protective gloves. Make sure the ventilation is adequate. Refer to the specific product for disposal recommendations.