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اوردو
Dimethyl carbonate
DMC has awesome solubility, slim melting and boiling factor range, excessive floor tension, low viscosity, low dielectric consistent of the medium, excessive evaporation temperature and speedy evaporation rate. Therefore, it can be used as a low poisonous solvent in the coating enterprise and pharmaceutical industry. It can be viewed that DMC no longer solely has low toxicity, however additionally has the traits of excessive flash point, low vapor pressure, and excessive explosion restrict in air. Therefore, it is a inexperienced solvent that combines cleanliness and safety.
| 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) |
| Refractivity | n20/D 1.368(lit.) |
| Flash Point | Store below +30°C. |
Although phosgene has excessive reactivity, its fairly poisonous and corrosive byproducts pose significant environmental strain and will progressively be phased out; DMC has a comparable nuclear response response center. When the carbonyl team of DMC is attacked with the aid of nucleophilic group, the acyl oxygen bond breaks to structure carbonyl compounds, and the spinoff is methanol. Therefore, DMC can substitute phosgene as a protected response agent to synthesize carbonate derivatives, such as carbamate pesticides, polycarbonate, isocyanate, etc., of which polycarbonate will be the biggest demand place for DMC, It is expected that over 80% of DMC will be used to produce polycarbonate in 2005.
