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DME is an isomer of ethylalcohol and has a low boiling point. It is colourless, virtually odourless, has a low surface tension and a low viscosity.

Owing to its high solubility coefficient, the propellant DME acts also as a solvent in aerosol formulations. This property makes DME a very valuable component in aerosol formulations which contain substances that are difficult to dissolve.

Physical properties Dimethylether (DME)

Physical properties Dimethylether (DME)

Chemical formula Temperature : CH3 - O - CH3 Measurement
Mol. Mass   : 46.07 g/mol
Boiling point   : -24.9 °C
Vapour Pressure 20° C : 5.1 bar (abs)
  50° C : 11.5 bar (abs)
Density liquid 20° C : 668.3 kg/m⊃3;
  50° C : 615 kg/m⊃3;
Relative vapour density 20° C : 1.59 (air = 1)
Solubility        
DME in water 20° C/1 bar : 5.7 % (m/m)
  20° C/4.8 bar : 36 % (m/m)
Water in DME 20° C/4.8 bar : 5.5 % (m/m)
Net calorific value, liquid   : 28.43 kJ/kg
Ignition Point DIN 51794 : 235 °C
Kauri Butanol Number   : 91  
Solubility coefficient   : 7.3  
Surface tension (liquid) 20° C : 0.0125 N/m
Viscosity gaseous 20° C : 0.0091 mPas
Viscosity liquid 20° C : 0.11 mPas 

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