What is gold salt?

Gold salt is a chemical compound that contains gold ions. It can be produced by dissolving gold in aqua regia (a mixture of hydrochloric acid and nitric acid), which forms a soluble gold chloride complex. Gold salt is commonly used in chemical research and medical treatments, such as in the treatment of rheumatoid arthritis. It can also be used as a reagent in organic synthesis and as a catalyst in various chemical reactions. Gold salt is highly toxic and must be handled with care.