Chemical

Products

Dimethyl Carbonate

Cas Number

616-38-6

Other Names

DMC

Methyl carbonate

The formula

OC(OCH3)2

Introduction

Dimethyl carbonate (DMC) is an organic compound with the formula OC(OCH3)2. It is a colourless, flammable liquid. It is classified as a carbonate ester. This compound has found use as a methylating agent and more recently as a solvent that is exempt from the restrictions placed on most volatile organic compounds (VOCs) in the US. Dimethyl carbonate is often considered to be a green reagent.

Physical and Chemical Properties
Physical state and appearance clear liquid
Odor Pleasant
Molecular Weight 90.08 g/mole
Color Colorless. Clear
Boiling Point 90°C (194°F) - 91 C
Critical Temperature 274.85°C (526.7°F)
Flash point 18°C (64.4°F). OPEN CUP: 21.667°C (71°F).
Melting Point 2°C (35.6°F) - 4 C.
Specific Gravity 1.069 @ 20 C.(Water = 1) 1.0636 @ 25 C
Vapor Pressure 5.6 kPa (@ 20°C)
Vapor Density 3.1 (Air = 1)
Solubility Insoluble in cold water, hot water
PURITY 99.0% min
WATER 0.1% max
FREE ACID 0.2% max
Applications

1. Dimethyl Carbonate is a solvent of both extraction and reaction used in many industries; pharmaceuticals; agrochemicals; hydrocarbon refinery; paint and coatings and fragrances

2. It is used as a methylation and carbonylation agent in organic synthesis

3. It can be used as fuel and lube additive

4. Synthesis of polycarbonates (PC); Production of methyl isocyanate and some carbamate pesticides; Replacement of highly-toxic phosgene and dimethyl sulfate as carbonylating agent and methylating agent in the production of many chemical products; Replacement of methyl tert-butyl ether (MTBE) as new fuel oil additive

5. Extensive use as an organic solvent with medium boiling point in the electrochemical and coating sectors