Sulfamic acid

Short Description:

  • Chemical Name:Sulfamic acid
  • CAS No.:5329-14-6
  • Deprecated CAS:1266250-83-2
  • Molecular Formula:H3NO3S
  • Molecular Weight:97.0947
  • Hs Code.:28111980
  • European Community (EC) Number:226-218-8
  • ICSC Number:0328
  • NSC Number:1871
  • UN Number:2967
  • UNII:9NFU33906Q
  • DSSTox Substance ID:DTXSID6034005
  • Nikkaji Number:J43.594E
  • Wikipedia:Sulfamic acid,Sulfamic_acid
  • Wikidata:Q412304
  • Pharos Ligand ID:K1LJWWKG9P2G
  • Mol file:5329-14-6.mol

Product Detail

Product Tags

Sulfamic acid 5329-14-6

Synonyms:amidosulfonic acid;aminosulfonic acid;Ammate;ammonium sulfamate;sulfamate;sulfamic acid;sulfamic acid, indium (+3) salt;sulfamic acid, magnesium salt (2:1);sulfamic acid, monoammonium salt;sulfamic acid, monopotassium salt;sulfamic acid, nickel (+2) salt (2:1);sulfamic acid, tin (+2) salt;sulfamic acid, zinc (2:1) salt

Chemical Property of Sulfamic Acid

● Appearance/Colour:white crystalline solid
● Vapor Pressure:0.8Pa at 20℃
● Melting Point:215-225 °C (dec.)(lit.)
● Refractive Index:1.553
● Boiling Point:247oC
● PKA:-8.53±0.27(Predicted)
● Flash Point:205oC
● PSA88.77000
● Density:1.913 g/cm3
● LogP:0.52900

● Storage Temp.:Store below +30°C.
● Solubility.:water: soluble213g/L at 20°C
● Water Solubility.:146.8 g/L (20 ºC)
● XLogP3:-1.6
● Hydrogen Bond Donor Count:2
● Hydrogen Bond Acceptor Count:4
● Rotatable Bond Count:0
● Exact Mass:96.98336413
● Heavy Atom Count:5
● Complexity:92.6
● Transport DOT Label:Corrosive

Safty Information

● Pictogram(s):XiXi
● Hazard Codes:Xi
● Statements:36/38-52/53
● Safety Statements:26-28-61-28A


Chemical Classes:Other Classes -> Sulfur Compounds
Canonical SMILES:NS(=O)(=O)O
Inhalation Risk:A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered.
Effects of Short Term Exposure:The substance is severely irritating to the eyes. The substance is irritating to the skin. The substance may be irritating to the respiratory tract.
Uses:Sulfamic acid is widely used in electroplating, hard-water scale reremovers, acidic cleaning agent, chlorine stabilizers, sulfonating agents, denitrification agents, disinfectants, flame retardants, herbicides, artificial sweeteners and catalysts.Sulfamic acid is a precursor to sweet-tasting compounds. Reaction with cyclohexylamine followed by addition of NaOH gives C6H11NHSO3Na, sodium cyclamate.Sulfamic acid is a water-soluble, moderately strong acid. An intermediate between sulfuric acid and sulfamide, it can be used as a precursor to sweet-tasting compounds, a therapeutic drug component, an acidic cleaning agent, and a catalyst for esterification.

Detailed Introduction

Sulfamic acid, also known as amidosulfonic acid, is a versatile and strong acid with a chemical formula of H3NSO3. It is an odorless, white crystalline solid that is highly soluble in water. Sulfamic acid exhibits excellent thermal stability, making it useful in various applications.
One of the prominent uses of sulfamic acid is as a descaling agent. Its strong acidic properties make it effective in removing scales, deposits, and rust from surfaces like boilers, cooling towers, and heat exchangers. It is also employed in household cleaning products such as toilet bowl cleaners, rust removers, and descalers.
Another significant application of sulfamic acid is in the synthesis and production of chemicals. It serves as a starting material for the production of herbicides, pharmaceuticals, plasticizers, food additives, and flame retardants. Sulfamic acid can be used as a catalyst or an intermediate compound in several chemical reactions due to its ability to react with various compounds.
Sulfamic acid is considered safer to handle compared to other strong acids, such as hydrochloric acid or sulfuric acid. It has a low volatility and does not release toxic fumes. However, like any acid, it can cause skin, eye, and respiratory irritations. Therefore, it is essential to follow proper safety precautions, wear protective equipment, and handle it in a well-ventilated area.
In conclusion, sulfamic acid is a versatile compound with various industrial and household applications. Its strong acidic properties and thermal stability make it an ideal choice for descaling purposes and chemical synthesis.


Sulfamic acid is commonly used for various applications, including:
Descaling: Sulfamic acid is a powerful descaling agent and is widely used for removing scales and deposits from boilers, heat exchangers, cooling towers, and other equipment. It effectively dissolves mineral deposits, rust, and limescale, improving the efficiency and lifespan of the equipment.
Cleaning: Sulfamic acid is utilized in various household and industrial cleaning products. It is often found in toilet bowl cleaners and bathroom cleaners due to its ability to remove tough stains, rust, and hard water deposits. It is also used in metal cleaning solutions for removing oxide layers and corrosion.
pH adjustment: Sulfamic acid is commonly used to adjust the pH level in various applications. It acts as a pH modifier or buffering agent in swimming pools, water treatment systems, and chemical processes, helping to maintain optimal pH levels.
Electroplating: Sulfamic acid is used in electroplating baths as a mild and stable acid. It ensures proper adhesion and enhances the quality of metal plating on various substrates.
Dyeing and bleaching agent: Sulfamic acid is used in the textile and paper industries as a dyeing and bleaching agent. It helps remove unwanted colors or stains from fabrics and paper products.
Herbicides: Sulfamic acid is used in the synthesis of herbicides and plant growth regulators. It acts as a crucial component in formulating selective and non-selective herbicides.
Pharmaceutical and chemical synthesis: Sulfamic acid serves as a starting material or catalyst in the production of various pharmaceuticals, chemicals, and intermediates. It participates in reactions like esterification, amidation, and sulfation.
It is important to note that when using sulfamic acid, proper safety precautions should be followed, including wearing protective equipment such as gloves and goggles, working in a well-ventilated area, and handling it in accordance with safety guidelines and regulations.

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