Sulfamic acid

Sulfamic acid, also known as amidosulfonic acid, amidosulfuric acid, aminosulfonic acid, sulphamic acid and sulfamidic acid, is a molecular compound with the formula H3NSO3. This colourless, water-soluble compound finds many applications. Sulfamic acid melts at 205 °C before decomposing at higher temperatures to water, sulfur trioxide, sulfur dioxide and nitrogen. Sulfamic acid (H3NSO3) may be considered an intermediate compound between sulfuric acid (H2SO4) and sulfamide (H4N2SO2), effectively replacing a hydroxyl (−OH) group with an amine (−NH2) group at each step. This pattern can extend no further in either direction without breaking down the sulfonyl (−SO2−) moiety. Sulfamates are derivatives of sulfamic acid.