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Sulfamic acid is an odorless, colorless, water-soluble and non-volatile chemical compound with the chemical formula H3NO3S. It is hygroscopic and non-volatile. Sulfamic acid solutions are less corrosive to metals than other mineral acids. Aqueous solutions are stable at room temperature, but rapid hydrolysis occurs with increasing temperature. It is a very strong acid. Its strength is comparable to hydrochloric acid and nitric acid. It dissolves in water at 20 oC at 21.5 g/100 g.