because it produces Chloroauric acid Which has corrosive to gold and platinum
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Gold can be turned into a variety of gold compounds. Most easily
it can be turned into chloroauric acid by immersing it in aqua
regia, a mixture of hydrochloric acid and nitric acid.
Some examples that would be considered an acid: sulfuric acid, nitric acid, hydrofluoric acid, perchloric acid, boric acid, periodic acid, salicilic acid, stearic acid, citric acid, oxalic acid, etc.