Methane Sulphonic Acid

Methane sulphonic acid, also known as methanesulfonic acid or mesylic acid. It is widely used as an acid catalyst and solvent in organic reactions in biological and agricultural industry. It is also a key ingredient in plating various metals to print circuit board manufacture in electric industry. Besides, Methane sulphonic acid is popularly used in textile treatment, and the production of plastics and polymers.


Molar Weight96.10 g/mol
Melting Point17-19 °C
Boiling Point167 °C
Flash Point>110 °C
Density1.35 g/cc
FormsLiquid (clear), Colourless

Uses and Applications

Key applications

  • Plastics and polymers
  • Fabric, textile and leather products
  • Corrosion inhibitor and anti-scaling agent
  • Metal finishing
  • Agricultural
  • Catalysts
  • Solvents
  • Pharmaceuticals
  • Batteries
  • Building & Construction products
  • Electronics


  • Oil & Gas
  • Cleaning
  • Coatings & Construction
  • Polymers
  • Cosmetics

Synonyms: Methanesulfonic acid, Methanesulphonic acid, Mesylate, Methylsulfonate, Methane sulfonic acid, MSA

Chemical Formula: CH3SO3H

CAS Number: 75-75-2