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471356

Sigma-Aldrich

Methanesulfonic acid

≥99.0%

Linear Formula:
CH3SO3H
CAS Number:
Molecular Weight:
96.11
Beilstein:
1446024
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

Quality Level

vapor density

3.3 (vs air)

vapor pressure

1 mmHg ( 20 °C)

assay

≥99.0%

form

liquid

refractive index

n20/D 1.429 (lit.)

bp

167 °C/10 mmHg (lit.)

mp

17-19 °C (lit.)

solubility

water: soluble 1,000 g/L at 20 °C

density

1.481 g/mL at 25 °C (lit.)

SMILES string

O=S(O)(C)=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

Methanesulfonic acid (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 may be used:
  • As a catalyst to produce linear alkylbenzenes by the addition reaction between long-chain olefins and benzene.
  • To prepare polyaniline (PANI)/graphene composites with enhanced thermal and electrical properties.
  • As a catalyst for the transformation of glucose/xylose mixtures to levulinic acid and furfural.

Packaging

5 L in poly drum
2.5 L in glass bottle
5, 25, 100, 500 mL in glass bottle

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Dermal - 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)

372.2 °F - closed cup

Flash Point(C)

189 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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