Dimethyl Carbonate
CAS No：616-38-6
Chemical Name: Dimethyl carbonate
Synonyms：DIMETHYL CARBONATE;METHYL CARBONATE;CARBONIC ACID DIMETHYL ESTER;Dimethylcarbonat;dimetyl carbonate;methylcarbonate((meo)2co);CH3OCOOCH3;Dimethylcarbonate,99%;DMC;dimethly carbonate
CBNumber: CB8853983
Molecular Formula: C3H6O3
Molecular Weight: 90.08
MDL Number: MFCD00008420
Dimethyl carbonate Properties
| Melting point | 2-4 °C (lit.) |
|---|---|
| Boiling point | 90 °C (lit.) |
| Density | 1.069 g/mL at 25 °C (lit.) |
| vapor density | 3.1 (vs air) |
| vapor pressure | 18 mm Hg ( 21.1 °C) |
| refractive index | n20/D 1.368(lit.) |
| Flash point | 65 °F |
| storage temp. | Store below +30°C. |
| solubility | 139g/l |
| form | Liquid |
| color | <50(APHA) |
| Odor | Pleasant |
| Relative density, gas (air=1) | 3.11 |
| explosive limit | 4.22-12.87%(V) |
| Water Solubility | 139 g/L |
| Sensitive | Moisture Sensitive |
| Merck | 14,3241 |
| BRN | 635821 |
| Dielectric constant | 3.1699999999999999 |
| Stability | Stable. Highly flammable. Incompatible with strong oxidizing agents, potassium t-butoxide. |
| InChIKey | IEJIGPNLZYLLBP-UHFFFAOYSA-N |
| LogP | 0.23-0.354 at 20-25℃ |
| Surface tension | 28.08mN/m at 298.15K |
| CAS DataBase Reference | 616-38-6 |
Dimethyl carbonate Chemical Properties,Uses,Production
Outline
Dimethyl carbonate is briefly referred to as DMC. At room temperature, it is a colorless and transparent liquid with a pungent odor with a relative density (D204) of 1.0694, a melting point of 4 °C, boiling point of 90.3 °C, the flash point being 21.7 °C (opening) and being 16.7 °C (closed ) and the refractive index (nd20) being 1.3687. It is flammable and non-toxic and is miserable with almost all organic solvents in any proportion with alcohols, ketones and esters. It is slightly soluble in water. It can be used as the methylating agent. Compared with other methylating reagent such as methyl iodide and dimethyl sulfate, dimethyl carbonate is less toxic, and biodegradable.
The past method of making dimethyl carbonate with phosgene as raw materials is not frequently used. Instead, people now adopt the catalytic oxidative carbonylation of methanol in the presence of oxygen which is more environmentally friendly than the previous method.
Dimethyl carbonate can enable to methylation of aniline, phenol and carboxylic acid. However, many reaction demands high-pressure. DBU can be added during reflux of DMC for catalyzing the methylation of carboxylic acid with dimethyl carbonate.
Reference quality standards
Index name battery grade excellent grade first grade qualified experimental methods
Appearance, colorless and transparent liquid
Dimethyl carbonate content% ≥99.9 ≥99.5 ≥99.0 ≥98.5 Gas Chromatography
Water, Water Content% ≤30ppm ≤0.10 ≤0.10 ≤0.10 GB606
Alkalinity mmol/10Og-≤0.10 ≤0.12 ≤0.12 Q/GNPC-JX 017
Non-volatile matter, %-≤0.02 ≤0.02 ≤0.02 GB6324.2
Peroxide (By H2O2) ≤5ppm---GB6016-85
Density (20 ℃), Density g/cm3 1.071 ± 0.005
The application of dimethyl carbonate
1, a novel type of low toxicity solvents and can substitute solvent such as toluene, xylene, ethyl acetate, butyl acetate, acetone or butanone in paints and adhesive industry, and is environmentally friendly green chemical products.
2, it is excellent methylating agent, carbonylation agent, hydroxymethylation agent and methoxylation agent and is a kind of chemical raw material of wide application.
3, it can be used as ideal substitute of highly toxic product such as phosgene, dimethyl sulfate, and methyl chloroformate.
4, it can be used for synthesizing polycarbonate, diphenyl carbonate, and isocyanate and so on.
5, in the field of medicine, it can be for the synthesis of anti-infective drugs, anti-inflammatory medicines, vitamin-class medicines and central nervous system drugs.
6, in the field of pesticides, it can be mainly used for the production of methyl isocyanate, thereby producing some carbamate drugs, pesticides (anisole).
7, it can be used as gasoline additives and lithium battery electrolyte and so on.
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