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| Water Miscibility |
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DME is of polar, water miscible nature. To form a single clear liquid phase aerosol composition, a maximum of 34 weight percent DME is miscible with water and a maximum of 6 weight percent. Water is miscible with DME. In between these borderlines the blend form liquid phases, see figure.
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How to avoid separation
This phase separation can easily be avoided by adding a third polar solvent. Especially ethyl alcohol is a very good and effective co-solvent for Dimethyl ether / water mixtures, see ternary diagram.
If one adds a minimum of 6 weight percent ethyl alcohol, all blends of DME and water will become a single clear liquid phase. A ternary diagram for blends of ethyl alcohol, water and dimethyl ether gives more detailed information.
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