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Sigma-Aldrich

Methanesulfonic acid solution

70 wt. % in H2O

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Synonym(s):
Mesylic acid, MsOH
Linear Formula:
CH3SO3H
CAS Number:
75-75-2
Molecular Weight:
96.11
Beilstein:
1446024
MDL number:
MFCD00007518
PubChem Substance ID:
24870724
NACRES:
NA.21

vapor density

3.3 (vs air)

Quality Level

200

vapor pressure

<1 mmHg ( 20 °C)

concentration

70 wt. % in H2O

impurities

≤1,000 ppm Sulfate (SO4)
≤10 ppm Iron
≤50 ppm Chloride (Cl)

refractive index

n20/D 1.416

density

1.319 g/mL at 25 °C

SMILES string

CS(O)(=O)=O

InChI

1S/CH4O3S/c1-5(2,3)4/h1H3,(H,2,3,4)

InChI key

AFVFQIVMOAPDHO-UHFFFAOYSA-N

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General description

The product is a 70% aqueous solution of methanesulfonic acid (MSA). MSA is a strong organic acid. The chemical oxidation of dimetyl sulfide in the atmosphere leads to the formation of MSA in large quantities. MSA undergoes biodegradation by forming CO2 and sulphate. It is considered a green acid as it is less toxic and corrosive in comparison to mineral acids.1 The aqueous MSA solution has been considered a model electrolyte for electrochemical processes.

Application

Methanesulfonic acid solution may be used to study the corrosion behavior of stainless steel.

Legal Information

Product of Arkema Inc.

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H290 - H302 - H314 - H335

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

8A - Combustible, corrosive hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

危险化学品

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Corrosion behaviour of stainless steels in aqueous solutions of methanesulfonic acid.
Finsgar M and Milosev I.
Corrosion Science, 52(7), 2430-2438 (2010)
Microbial metabolism of methanesulfonic acid.
Kelly DP and Murrell JC.
Archives of Microbiology, 172(6), 341-348 (1999)
Methane Sulphonic Acid is Green Catalyst in Organic Synthesis.
Kulkarni P.
Orient. J. Chem., 31(1), 447-451 (2015)
Environmental benefits of methanesulfonic acid. Comparative properties and advantages.
Gernon MD.
Green Chemistry, 1(3), 127-140 (1999)
Chris Twelves et al.
Breast cancer research and treatment, 148(3), 553-561 (2014-11-09)
Data from two phase 3 studies of eribulin were pooled in analyses initially requested by the European Medicines Agency to assess whether specific patient subgroups, previously treated with an anthracycline and a taxane, benefited from eribulin. Study 305/EMBRACE included women
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