A chemical burn occurs when living tissue is exposed to any of six types of chemical substance. Acids, bases, oxidizers, solvents, and reducing agents can all cause chemical burns without the presence of a heat source. Burns may occur right away, though they may not be immediately evident. Symptoms include itching, bleaching or darkening of the skin, burning sensations, trouble breathing, and tissue necrosis. What substances can produce chemical burns hours after contact with human skin? Discuss
Source: The Free Dictionary