269190

Sigma-Aldrich

Methanesulfonic anhydride

97%

Linear Formula:
(CH3SO2)2O
CAS Number:
Molecular Weight:
174.20
Beilstein/REAXYS Number:
972316
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

vapor density

3.3 (vs air)

assay

97%

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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Pictograms

Corrosion

Signal Word

Danger

Hazard Statements

Precautionary Statements

Supp Hazards

EUH014

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

RIDADR

UN 3261 8 / PGII

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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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