Aqua regia is commonly used to remove noble metals such as gold, platinum and palladium from substrates, particularly in microfabrications and microelectronics labs. Glassware may also be washed with aqua regia to remove organic compounds only in trace amounts. Aqua regia solutions are extremely corrosive and may result in explosion or skin burns, if not handled with extreme caution. DO NOT use aqua regia unless it is necessary. Please consult with PI or senior lab investigators before you use aqua regia for the first time.