Project Description

Methanesulfonic acid
Chemical Name Methanesulfonic acid 70%/99%
CAS No. 75-75-2
Molecular Formula: CH4O3S
Molecular Weight: 96.11
EINECS: 200-898-6
Appearance Liquid
Melting point 19 °C
Flash point >230 °F
Boiling point 167 °C10 mm Hg(lit.)
Storage temp. 2-8°C
Density 1.481 g/mL at 25 °C(lit.)



It appears as colorless or slightly brown oily liquid, appearing as solid at low temperatures. It has a melting temperature of 20 °C, the boiling point of 167 °C (13.33 kPa), 122 °C (0.133 kPa),  the relative density of 1.4812 (18 ℃) and refractive index 1.4317 (16 ℃). It is soluble in water, alcohol and ether, insoluble in alkanes, benzene and toluene. It will not subject to decomposition in boiling water and hot alkaline solution. It also has strong corrosion effect against the metal iron, copper and lead.


Methanesulfonic acid is a raw material for medicine and pesticide. It can also be used as dehydrating agent, curing accelerator for coating, treating agent for fiber, solvent, catalysis, and esterification as well as polymerization reaction.
It can be used as solvent, alkylation, catalyst of esterification and polymerization, also used in medicine and electroplating industry. It can also be applied to oxidation.


Contact us for Methanesulfonic Acid MSDS -Material Safety Data Sheet and Methanesulfonic Acid CAS 75-75-2 COA-Certificate of Analysis, Product Data Sheet – in PDF Document.

Safety Information:



RIDADR:  UN 3265 8/PG 2

Methanesulfonic acid supplier

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