What is 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.

  • Synonyms: Methanesulfonic acid, Methanesulphonic acid, Mesylate, Methylsulfonate, Methane sulfonic acid, MSA
  • INCI: Methane Sulphonic Acid
  • Chemical Formula: CH3SO3H
  • CAS Number: CAS 75-75-2

Product Specifications


Chemical Formula CH3SO3H
CAS Number CAS 75-75-2
Molar Weight 96.10 g/mol
Specific Gravity 1.35
Melting Point 17-19 °C
Boiling Point 167 °C
Flash Point >110 °C

Uses and Applications for Methane Sulphonic Acid


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

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