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471259

Sigma-Aldrich

Methanesulfonyl chloride

≥99.7%

Synonym(s):

Methyl sulfonyl chloride, Mesyl chloride

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About This Item

Linear Formula:
CH3SO2Cl
CAS Number:
124-63-0
Molecular Weight:
114.55
Beilstein/REAXYS Number:
506297
EC Number:
204-706-1
MDL number:
MFCD00007454
UNSPSC Code:
12352101
PubChem Substance ID:
24870710
NACRES:
NA.22

Quality Level

200

assay

≥99.7%

refractive index

n20/D 1.452 (lit.)

bp

60 °C/21 mmHg (lit.)

density

1.48 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

CS(Cl)(=O)=O

InChI

1S/CH3ClO2S/c1-5(2,3)4/h1H3

InChI key

QARBMVPHQWIHKH-UHFFFAOYSA-N

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Application

Methanesulfonyl chloride can be used for the mesylation of primary alcohols to synthesize the corresponding methanesulfonates. It may also be used for the conversion of amines to the corresponding sulfonamides.

pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT SE 3

target_organs

Respiratory system

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk_germany

WGK 2

flash_point_f

215.6 °F - closed cup

flash_point_c

102 °C - closed cup

ppe

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

Certificates of Analysis (COA)

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Methanesulfonyl Chloride.
Vaillancourt V
e-EROS Encyclopedia of Reagents for Organic Synthesis. (2007)
Water-solvent method for tosylation and mesylation of primary alcohols promoted by KOH and catalytic amines.
Morita J I
Green Chemistry, 7(10), 711-715 (2005)
Base-free monosulfonylation of amines using tosyl or mesyl chloride in water
Kamal A
Tetrahedron Letters, 49(2), 348-353 (2008)
Shengzhuang Tang et al.
The Journal of organic chemistry, 85(5), 2945-2955 (2020-02-06)
Despite its importance in the design of photocaged molecules, less attention is focused on linker chemistry than the cage itself. Here, we describe unique uncaging properties displayed by two coumarin-caged thymidine compounds, each conjugated with (2) or without (1) an
E A Connor et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 3(11), 2164-2171 (1983-11-01)
Excitatory postsynaptic currents (EPSCs), miniature excitatory postsynaptic currents (MEPSCs), and acetylcholine-induced current fluctuations (noise) have been studied in voltage-clamped bullfrog parasympathetic ganglion cells of the atrial septum. EPSCs were also recorded from voltage-clamped sympathetic B cells and, in general, it
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