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269190

Sigma-Aldrich

Methanesulfonic anhydride

97%

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Synonym(s):
Mesyl anhydride, Mesylic anhydride, Methanesulfonyl anhydride, Methylsulfonyl methanesulfonate
Linear Formula:
(CH3SO2)2O
CAS Number:
Molecular Weight:
174.20
Beilstein/REAXYS Number:
972316
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

vapor density

3.3 (vs air)

Quality Level

assay

97%

form

solid

bp

125 °C/4 mmHg (lit.)

mp

64-67 °C (lit.)

SMILES string

CS(=O)(=O)OS(C)(=O)=O

InChI

1S/C2H6O5S2/c1-8(3,4)7-9(2,5)6/h1-2H3

InChI key

IZDROVVXIHRYMH-UHFFFAOYSA-N

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1 of 4

This Item
18626033214471356
Methanesulfonic anhydride 97%

269190

Methanesulfonic anhydride

Ethanesulfonic acid 95%

186260

Ethanesulfonic acid

Acetic anhydride puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99% (GC)

33214

Acetic anhydride

Methanesulfonic acid ≥99.0%

471356

Methanesulfonic acid

Quality Level

200

Quality Level

-

Quality Level

200

Quality Level

200

bp

125 °C/4 mmHg (lit.)

bp

123 °C/0.01 mmHg (lit.)

bp

138-140 °C (lit.)

bp

167 °C/10 mmHg (lit.)

form

solid

form

-

form

-

form

liquid

mp

64-67 °C (lit.)

mp

−17 °C (lit.)

mp

−73 °C (lit.)

mp

17-19 °C (lit.)

vapor density

3.3 (vs air)

vapor density

-

vapor density

3.5 (vs air)

vapor density

3.3 (vs air)

General description

Methanesulfonic anhydride is an organic compound that is commonly used as a reagent for the preparation of methyl sulfonates (mesylates). It is also used in the synthesis of methanesulfonamides using various amine precursors. Additionally, the mixture of methanesulfonic anhydride and dimethyl sulfoxide can be used as an oxidizing agent for the oxidation of primary and secondary alcohols to aldehydes and ketones.

pictograms

Corrosion

signalword

Danger

hcodes

Hazard Classifications

Skin Corr. 1A

supp_hazards

Storage Class

8A - Combustible, corrosive hazardous materials

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges


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Customers Also Viewed

Keith Smith et al.
Organic & biomolecular chemistry, 2(21), 3150-3154 (2004-10-27)
Regioselective methanesulfonylation of simple aromatics using methanesulfonic anhydride can be achieved over zeolite catalysts. For example, methanesulfonylation of toluene over various cation-exchanged zeolite beta catalysts affords higher para-selectivity in the synthesis of methyl tolyl sulfone than standard Friedel-Crafts methanesulfonylation utilising
Mark C Wilkinson
Organic letters, 13(9), 2232-2235 (2011-03-29)
The utility of methanesulfonic anhydride for promoting the Friedel-Crafts acylation reaction of aryl and alkyl carboxylic acids is disclosed. This reagent allows the preparation of aryl ketones in good yield with minimal waste containing no metallic or halogenated components, clearly
Mohammad Hasani et al.
The journal of physical chemistry. B, 123(8), 1815-1821 (2019-02-20)
Protic ionic liquids (PILs) are made by proton transfer from a Brønsted acid to a base and are of interest for their solvent and electrolyte properties such as high ionic conductivity. Unfortunately, many PILs have been misnamed, because their ionic

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