Sulfamic acid, also known as amidosulfonic acid, amidosulfuric acid, aminosulfonic acid, and sulfamidic acid, is a molecular compound with the formula H₃NSO₃. This colorless, water-soluble compound finds many applications.

Sulfamic acid (H₃NSO₃) may be considered an intermediate compound between sulfuric acid

Sulfuric acid

Sulfuric acid is a strong mineral acid with the molecular formula . Its historical name is oil of vitriol. Pure sulfuric acid is a highly corrosive, colorless, viscous liquid. The salts of sulfuric acid are called sulfates...

 (H₂SO₄), and sulfamide

Sulfamide

Sulfamide is a chemical compound with the molecular structure H2NSO2NH2. Sulfamide is produced by the reaction of sulfuryl chloride with ammonia.-Sulfamide functional group.:...

 (H₄N₂SO₂), effectively - though see below - replacing an -OH group with an -NH₂ group at each step.