Sulphamic Acid
Amidosulfonic Acid, Sulfamidsäure, Sulfamidic Acid.
- CAS
- 5329-14-6
- EC
- 226-218-8
- Sectors
- Water & Wastewater Treatment, Home Care & Industrial Cleaning
Sulphamic Acid (CAS 5329-14-6) is a dry crystalline inorganic acid, supplied as a white crystalline solid or powder, that offers low volatility and a long shelf life and removes calcium and magnesium scale from heat exchangers, boilers, and cooling systems. It is typically available as a Technical Grade or high-purity white powder with a high shelf-life and low volatility.
The chemical is a staple in industrial descaling, effectively removing calcium and magnesium scales from heat exchangers, boilers, and cooling systems without excessive metal corrosion. Its low toxicity and non-fuming nature make it a safer alternative for professional cleaning formulations.
In specialized applications, it acts as a nitrite scavenger in the production of dyes and as a stabilizer for chlorine in swimming pools. Its ability to form highly soluble salts with most metal ions ensures that cleaned surfaces remain free of residue, maintaining high process efficiency.
Typical Properties
| Molecular formula | H3NO3S |
|---|---|
| Molecular weight | 97.09 g/mol |
| Appearance | Sulfamic acid is a white crystalline solid. |
| Form | Crystals or Crystalline Powder |
| Color | White |
| Odor | odorless |
| Melting point | 205 °C |
| Density | 2.15 g/cm³ |
| Water solubility | 146.8 g/L (20 °C) |
| pH | 1.2 (10g/l, H2O) |
| GHS signal word | Warning · Irritant / harmful, Health hazard |
| HS code | 28111980 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Sulphamic Acid
Applications
• Industrial Descaling: Removes hard water scale, rust, and mineral deposits from cooling towers, boilers, and condensers in power plants and refineries.• Cleaning Products: Active ingredient in household and industrial descalers, toilet bowl cleaners, and specialized metal cleaners.• Chlorine Stabilization: Used in water treatment to stabilize residual chlorine and prevent the formation of nitrogen trichloride in cooling systems.
Safety & Risks
Classified as Hazard Class 8 (Corrosive) and Skin/Eye Irritant. Harmful to aquatic life; use Nitrile Gloves, Safety Goggles, and ensure disposal according to Local Environmental Regulations.
Packaging
25 kg Woven Bags, 50 kg Drums, and 1000 kg Big Bags.