Acid mist is classified as carcinogenic to humans and proven to cause laryngeal and lung cancer in addition to tooth erosions and respiratory irritation.  The most common exposure is through inhalation or dermal contact. In December 2009 European Union legislated a directive establishing a list of indicative occupational exposure limit values and acid mist was included in the directive. According to the document the limit value for sulfuric acid exposure is 0,05 mg/m3 over 8 hours.