Merck
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64270

Sigma-Aldrich

Methanesulfonyl chloride

purum, ≥98.0% (AT)

Synonym(s):
Mesyl chloride, Methyl sulfonyl chloride
Linear Formula:
CH3SO2Cl
CAS Number:
Molecular Weight:
114.55
Beilstein:
506297
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

grade

purum

assay

≥98.0% (AT)

refractive index

n20/D 1.452 (lit.)
n20/D 1.452

bp

60 °C/21 mmHg (lit.)

density

1.48 g/mL at 25 °C (lit.)

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

CorrosionSkull and crossbones

Signal Word

Danger

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

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

WGK

WGK 2

Flash Point(F)

235.4 °F - closed cup

Flash Point(C)

113 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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