: While the acid itself has not been isolated in pure form, its hemihydrate ( ) forms stable white crystals. When heated to , these crystals dehydrate and condense.
: It is typically synthesized by treating arsenic trioxide ( As2O3cap A s sub 2 cap O sub 3 arsenic acid
) with concentrated nitric acid. It can also be produced through the slow hydration of arsenic pentoxide ( As2O5cap A s sub 2 cap O sub 5 ) in water. : While the acid itself has not been