Sulphamic acid is used as an acidic cleaning agent, typically for metals and ceramics. It is a replacement for hydrochloric acid for the removal of rust. In households, it is often found as a descaling agent in detergents, cleaners, and toilet cleaners for the removal of limescale. It offers effective cleaning without producing harmful fumes, making it safer for indoor use. Sulphamic acid also helps prevent corrosion of metal surfaces during the cleaning process. Its biodegradable nature makes it an environmentally friendly choice for various cleaning applications.