Dimethyl sulfite Chemical Properties

Melting point:

0°C

Boiling point:

126-127 °C (lit.)

Density 

1.294 g/mL at 25 °C (lit.)

refractive index 

n20/D 1.410(lit.)

Flash point:

106 °F

storage temp. 

Flammables area

form 

Liquid

color 

Clear colorless to pale yellow

Water Solubility 

soluble

BRN 

1700256

Dielectric constant

22.5（23℃）

CAS DataBase Reference

616-42-2(CAS DataBase Reference)

NIST Chemistry Reference

Sulfurous acid, dimethyl ester(616-42-2)

EPA Substance Registry System

Sulfurous acid, dimethyl ester (616-42-2)

Safety Information

Hazard Codes 

Xi

Risk Statements 

10-36/37/38

Safety Statements 

26-36-24/25-16

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

RTECS 

WT3512000

HazardClass 

3.2

PackingGroup 

III

HS Code 

29209085

MSDS

• Language:English Provider:Dimethyl sulfite
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich

Dimethyl sulfite Usage And Synthesis

Chemical Properties

CLEAR COLORLESS TO PALE YELLOW LIQUID

Uses

The conformations and vibrational spectra of dimethyl sulfite was studied by matrix-isolation fourier transform infrared spectroscopy and to study its conformational selective aggregation. It may be used in organic synthesis.

Preparation

Dimethyl sulfite is prepared from a 1:2 ratio of thionyl chloride and methanol. The reaction can be catalyzed by tertiary amine bases and likely proceeds via the chlorosulfinate (MeOS(O)Cl), this intermediate will exist only fleetingly in the presence of methanol and as such its decomposition to methyl chloride and sulfur dioxide (via the slower SNi mechanism) is not observed to any great extent.
SOCl2 + 2 CH3OH → (CH3O)2SO + 2 HCl

Application

The conformations and vibrational spectra of dimethyl sulfite was studied by matrix-isolation fourier transform infrared spectroscopy and to study its conformational selective aggregation.
Dimethyl sulfite may be used in organic synthesis. It is used as an additive in some polymers to prevent oxidation. It is also a potentially useful high energy battery electrolyte solvent.

Definition

ChEBI: Dimethyl sulfite is a sulfite ester.

General Description

Dimethyl sulfite is an insect repellent and also experimentally identified as a mutagenic agent.

Dimethyl sulfite(616-42-2)Related Product Information

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• ETHANE
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