About Us

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

Sulfamic acid melts at 205 °C before decomposing at higher temperatures to H2O, SO3, SO2, and N2. Sulfamic acid (H3NSO3) may be considered an intermediate compound between sulfuric acid (H2SO4), and sulfamide (H4N2SO2), effectively – though see below – replacing an – OH group with an – NH2 group at each step.

This pattern can extend no further in either direction without breaking down the – SO2 group. Sulfamates are derivatives of sulfamic acid.

Sulfamic acid is produced industrially by treating urea with a mixture of sulfur trioxide and sulfuric acid (or oleum).

The conversion is conducted in two stages:
OC(NH2)2 + SO3 → OC(NH2)(NHSO3H)
OC(NH2)(NHSO3H) + H2SO4 ? CO2 + 2 H3NSO3


Office Address : 4518, G. I. D. C, Ankleshwar
Telephone : 02646 – 239861
Mobile No : 09925006935
Date of Establishment : 99-2000
Type of Industry : MFG Unit,
Products : Sulphamic Acid 300 mt per Month
Current Annual Turnover : 6 Caror Above


  1. Name of Products : SULFAMIC ACID
  2. C.A.S.NO. : 5329-14-6
  3. Chemical Name : Amino Sulphonic Acid
  4. Chemical Formula : H2NSO3H
  5. Molecular Weight : 97.09
  6. Melting Point : 2050 C
  7. Boiling Point : Decomposes at 2090 C
  8. Physical Appearance : : Snow White Powder
  9. Purity : 98.00 % ( Min.) (By Acid Base titration )
  10. Moisture : 1% ( Max.)
  11. Iron Content : 5 – 7 ppm

Sulfamic acid Structure and reactivity

The compound is well described by the formula H3NSO3, not the tautomerH2NSO2(OH). The relevant bond distances are S=O, 1.44 and S–N 1.77 Å. The greater length of the S–N distance is consistent with a single bond. Furthermore, a neutron diffraction study located the hydrogen atoms, all three of which are 1.03 Å distant from nitrogen. In the solid state, the molecule of sulfamic acid is well described by a zwitterionic form:

Sulfamic acid is mainly a precursor to sweet-tasting compounds. Reaction with cyclohexylamine followed by addition of NaOHgives C6H11NHSO3Na, sodium cyclamate. Related compounds are also sweeteners, see acesulfame potassium. Sulfamates have been used in the design of many types of therapeutic agents such as antibiotics, nucleoside/nucleotidehuman immunodeficiency virus (HIV) reverse transcriptase inhibitors, HIV protease inhibitors (PIs), anti-cancer drugs (steroid sulfatase and carbonic anhydrase inhibitors), anti-epileptic drugs, and weight loss drugs.

Sulfamic acid Cleaning agent

Sulfamic acid is used as an acidic cleaning agent, sometimes pure or as a component of proprietary mixtures, typically formetals and ceramics. It is frequently used for removing rust and limescale, replacing the more volatile and irritatinghydrochloric acid, which is however cheaper. It is often a component of household descaling agents, for example, Lime-A-Way Thick Gel contains up to 8% sulfamic acid and pH 2–2.2, or detergents used for removal of limescale. When compared to most of the common strong mineral acids, sulfamic acid has desirable water descaling properties, low volatility, low toxicity. It forms water-soluble salts of calcium and ferric iron. Importantly, sulfamic acid is preferable to use in household in comparison to hydrochloric acid for its intrinsic safety. If erroneously mixed with hypochlorite based products such as bleach, it does not form chlorine gas, where the most common acids would; the reaction (neutralization) with NH3, produces a salt as depicted in the section above. It also finds applications in the industrial cleaning of dairy and brew-house equipment. Although it is considered less corrosive than hydrochloric acid, corrosion inhibitors are often added to commercial cleansers of which it is a component. Some of its domestic use, e.g. Easy-Off, for descaling include home coffee and espresso equipment and in denture cleaners.

Sulfamic acid Other uses

Catalyst for esterification process
Dye and pigment manufacturing
Coagulator for urea-formaldehyde resins
Ingredient in fire extinguishing media. Sulfamic acid is the main raw material for ammonium sulfamate which is a widely used herbicide and fire retardant material for household product.
Pulp and paper industry as a chloride stabilizer
Synthesis of nitrous oxide by reaction with nitric acid
The deprotonated form (sulfamate) is a common counterion for nickel(II) in electroplating.

Silver polishing

According to the label on the consumer product, the liquid silver cleaning product TarnX contains thiourea, a detergent, and sulfamic acid. Sulfamic acid is used:
For cleaning of industrial equipment: - sediment of minerals (hardness, oxide films, compounds of iron); - From milk and beer stone.
In public catering establishments and in everyday life: - For use in formulations of cleaning agents.
As raw material for the synthesis of chemicals: - For fire-resistant materials; - For herbicides.
In electroplating: - For the preparation of electrolytes.
To remove the mucus from the water-cooling systems (basins)

Advantages of using Sulphamic Acid
Sulphamic Acid has very high shelf life
Sulphamic acid has very high effectivity of the descaling.
The solid can be directly charged to system eliminating the cost of system reduces the leave of scaling solids and acts as anti ? descalant.

Complete cleaning can be chemically achieved by Sulphamic acid and does not require post descaling manual cleaning.

No system required for dosing.
It is recommended to does into the cooling water for descaling the condenser on running plant.
Sulphamic acid is safe acid and has no handling hazards.
Disadvantages of using Sulphamic Acid Provides a strong irritant effect to the skin and mucous membranes of the eyes

We are leading manufacturer of amino sulphonic acid in ankleshwar, gujarat, india and also manufacturer of sulfamic acid in ankleshwar, gujarat, india.

We are leading supplier of amino sulphonic acid in ankleshwar, gujarat, india and also supplier of sulfamic acid in ankleshwar, gujarat, india.