Aminosulfonic Acid, Sulfamic Acid


Aminosulfonic acid is also known as sulfamic acid. It is a white orthorhombic crystal and nonvolatile, nonhygroscopic, smell-less. The sulfamic acid has high stability at normal temperature. And it can maintain original quality for several years and is freely soluble in water and liquid ammonia, strongly acidic in water solution.

Aminosulfonic acid is slightly soluble in methanol, insoluble in ethanol, and ether. Characteristics of double functional groups of amino gen and sulphonic radical may go on chemical reaction with many matters. Its melting point is 205℃. And the decomposing temperature is 209℃.

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Molecular Formula:


Molecular Weight:


Structure Formula:

sulfamic acid structure formula


Item Index
Appearance Colorless or white crystal
Sulfamic Acid, % 99.6 Min.
Sulfate (SO42-), % 0.05 Max.
Iron (Fe3+), % 0.006 Max.
Loss on drying, % 0.05 Max.
Insoluble in water, % 0.02 Max.


Aminosulfonic acid can be used as amphoteric surfactants, metal parts cleaning agent, cyclamate sweetener, paper pulp bleacher, fire retarder, chlorine (sterilization) stabilizer, and electroplating additive.

Sulfamic acid can get away with surface oxide. So it can clean the boiler and sterilize bacterium in water, bleach fiber, wood, and paper, remove nitrate in tobacco. Aminosulfonic acid can also be used as raw material for pesticide intermediate.

Packing and Storage:

Normally packed in 25kgs net PE bag. Storage for one year in room shady and dry place.


Amidosulfuric acid, Sulfamic acid descaler, Sulphamidic acid, Sulfamidic acid, Sulfamic acid.


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