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421-20-5 structure, CH3FO3S
Methyl Fluorosulfonate
CAS No.: 421-20-5 Formula: CH3FO3S Molecular Weight: 114.09600
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421-20-5 structure, CH3FO3S

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421-20-5 structure, CH3FO3S

Methyl Fluorosulfonate

CAS No.:

421-20-5

 Formula:

CH3FO3S

 Molecular Weight: 114.09600
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Description

Methyl fluorosulfonate, (also known as magic methyl, a name coined by George Olah) has the chemical formula F-SO2-OCH3. It is prepared by distillation of an equimolar mixture of fluorosulfonic acid and dimethyl sulfate, and used as a powerful methylating reagent (about four orders of magnitude more reactive than methyl iodide). Since it will just as readily methylate biological tissues, it is acutely toxic (LC50 (rat) ~ 5 ppm), causing irritation of the airways and pulmonary edema, presumably by methylation of lipids in the cell membranes. Its use as a methylating reagent is banned by many organisations as a result.

Basic Info

Chemical Name

 Methyl Fluorosulfonate

Synonyms

fluorosulfonyloxymethane; Fluorosulfonic Acid Methyl Ester; Sulfuric acid, fluoro-, methyl ester; METHYL FLUOROSULFONATE; Methyl Fluorosulfate; Fluorosulfuric Acid Methyl Ester; Expand

CAS No.

 421-20-5

Molecular Formula

 CH3FO3S

Molecular Weight

 114.09600

PSA

 51.75000

LogP

 0.92790

Numbering system

UNII N015VFJ94Z

Properties

Density

 1.464g/cm3

Boiling Point

 93ºC at 760mmHg

Flash Point

 10ºC

Refractive Index

 1.363

Vapor Pressure

 57.3mmHg at 25°C

Safety Info

RTECS

 LP0720000

Safety Statements

 S26; S36/37/39

HS Code

 2915900090

RIDADR

 UN 3265

Risk Statements

 R34

Hazard Codes

 C
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Precursor:
diazomethane iodomethane Methane, ion(2+) acetone 3,3,4,4-tetrafluorooxathietane 2,2-dioxide dimethyl sulfate methyl 2,3,3,3-tetrafluoro-2-methoxypropanoate dimethyl sulfite 2-(Trifluoromethyl)-3-methoxy-1,1,1,3,4,4,5,5,5-nonafluoropentane chlorosulfonyloxymethane
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octan-3-one trimethyl amidosulfonic acid hexacarbonylmolybdenum N,2,4-Trimethylbenzamide 4-Fluoro-N-methylbenzamide 3-NONANONE 2-methylbut-2-ene fluorosulfinyloxymethane N-methyl-3-nitrobenzamide
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Compound Synonyms: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9

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