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Merck

471356

Methanesulfonic acid

≥99.0%, liquid

Synonym(s):

Mesylic acid, MsOH

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About This Item

Linear Formula:
CH3SO3H
CAS Number:
75-75-2
Molecular Weight:
96.11
NACRES:
NA.21
PubChem Substance ID:
24870726
UNSPSC Code:
12352100
EC Number:
200-898-6
MDL number:
MFCD00007518
Beilstein/REAXYS Number:
1446024

Product Name

Methanesulfonic acid, ≥99.0%

InChI key

AFVFQIVMOAPDHO-UHFFFAOYSA-N

InChI

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

SMILES string

O=S(O)(C)=O

vapor density

3.3 (vs air)
[3.3 (vs air)] (vs air)

vapor pressure

1 mmHg ( 20 °C)

assay

≥99.0%

form

liquid

refractive index

n20/D 1.429 (lit.)

pH range

<1

bp

[167 °C/10 mmHg (lit.)]
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.)

functional group

sulfonic acid

Quality Level

200

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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.

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.

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

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

8A - Combustible corrosive hazardous materials

wgk

WGK 1

flash_point_f

372.2 °F - closed cup

flash_point_c

189 °C - closed cup

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
BCCP1470
BCCP0127
MKCX8701
BCCN2714
BCCN0148

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Facile in-situ preparation of polyaniline/graphene nanocomposites using methanesulfonic acid.
Kim DH and Park SY.
Polymer, 55(12), 2928-2935 (2014)
Methane Sulphonic Acid is Green Catalyst in Organic Synthesis.
Kulkarni P.
Orient. J. Chem., 31(1), 447-451 (2015)
Microbial metabolism of methanesulfonic acid.
Kelly DP and Murrell JC.
Archives of Microbiology, 172(6), 341-348 (1999)
Use of methanesulfonic acid as catalyst for the production of linear alkylbenzenes.
Luong BX, et al.
J. Catal., 226(2), 301-307 (2004)
Methanesulfonic acid-catalyzed conversion of glucose and xylose mixtures to levulinic acid and furfural.
Rackemann DW, et al.
Industrial Crops and Products, 52, 46-57 (2014)
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