Nitro-hydrochloric acid is a highly corrosive and volatile acid that is commonly used in the production of chemicals and pharmaceuticals. It is also known as aqua regia, due to its ability to dissolve noble metals such as gold and platinum. However, depending on the context of its use, nitro-hydrochloric acid may also be referred to as nitric acid, hydrochloric acid, or mixtures of the two. In laboratory settings, it is often called nitro-muriatic acid or HNO3-HCl because of its components. Regardless of what it is called, nitro-hydrochloric acid should always be handled with extreme care due to its hazardous nature.