Dimethyl Ether(DME)
DME is an extremely high-purity product synthesized with high-purity methanol as the raw material, using a special, high-activity synthesis catalyst.
| Other names |
Dimethyl Ether
Abbreviation: DME |
| Single chemical substance or composite |
Single chemical substance |
| Chemical formula |
CH3-O-CH3 |
| Cas No. |
115-10-6 |
| Chemical Substances Control Law No. |
(2)-360 |
| Industrial Safety and Health Act No. |
None |
Physical properties
| External appearance |
Colorless gas |
| Specific gravity |
0.661 (liquid at 20°C) |
| Freezing point, melting point |
Freezing/melting point: -141.5°C (-222.7°F) |
| Flash point, ignition point |
Boiling point:-24.82°C (-12.68°F) |
| Dust explosion |
Explosive limit: 3.4 to 27 (vol %) |
| Stability, reactivity |
Thermally stable to at least 400°C in an inert atmosphere. Stable in solution at neutral, slightly acidic, and slightly alkaline pH. |
Relevant laws and regulations
| Industrial Safety and Health Act |
Inflammable gas |
| Fire Service Act |
－ |
| Poisonous and Deleterious Substances Control Act |
－ |
| Ship Safety Act |
Dangerous materials, high-pressure gas |
| Civil Aeronautics Act |
Explosive materials, etc., high-pressure gas |
| Other principal relevant laws and regulations |
High-pressure gas, inflammable gas, liquefied gas |
Hazard category
| Category name |
High-pressure gas, inflammable gas |
| Hazard |
High-pressure, liquefied gas that is inflammable |
| Harmfulness |
Anesthetic properties, albeit very weak With exposure to a high concentration (e.g. 7.5%), there may be a mildly unpleasant feeling, but no external changes occur. In addition, if liquefied gas comes into contact with skin, it causes inflammation and cryogenic injury. |
Principal uses
Aerosol propellants
Product specifications
| Packaging/transport types |
Tankers, ISO tanks |
Product composition specifications
| Purity (wt %) |
At least 99.9 |
| Carbonic acid gas (wt %) |
No higher than 0.1 |
| Methyl formate (wt %) |
No higher than 0.01 |
| Methanol (wt %) |
No higher than 0.01 |
| Water (wt %) |
No higher than 0.002 |
| Vapor pressure (MPa) |
0.41±0.02 (20°C) |
| Specific gravity (20/4°C) |
0.67±0.01 |
