Sulfamic acid is widely used as a cleaning agent, particularly for removing rust and limescale. It is effective in descaling boilers, heat exchangers, and cooling towers due to its ability to dissolve mineral deposits without corroding metal surfaces. In the household, it is found in toilet bowl cleaners and descalers for appliances like coffee makers and kettles.

In industrial applications, it serves as a catalyst in esterification processes and as a raw material in the production of dyes, pigments, and flame retardants. It is also used in the paper and pulp industry to bleach and stabilize chlorine dioxide.

Additionally, sulfamic acid is employed in water treatment to neutralize excess chlorine and as a herbicide to control weeds. Its versatility and effectiveness make it a valuable chemical across various sectors.