A<unk>  occurs when living tissue is exposed to a corrosive substance (such as a strong acid, base or oxidizer) or a cytotoxic agent (such as mustard gas, lewisite or arsine).<unk> s follow standard burn classification and may cause extensive tissue damage. The main types of irritant and/or corrosive products are: acids, bases, oxidizers / reducing agents, solvents, and alkylants. Additionally,<unk> s can be caused by some types of cytotoxic<unk>  weapons, e.g., vesicants such as mustard gas and Lewisite, or urticants such as phosgene oxime.<unk> s may: * need no source of heat * occur immediately on contact * not be immediately evident or noticeable * be extremely painful * diffuse into tissue and damage cellular structures under skin without immediately apparent damage to skin surface
Chemical burn
Thermal burn
Electrical burn
Friction burn
Radiation burn
Powder burn
Flash burn
Hydrofluoric acid burn