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Physical & Chemical properties

Surface tension

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Description of key information

61.3-61.5mN/m at 20C (1g/l)

Key value for chemical safety assessment

Surface tension:
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

There is no data available for the surface tension of triethylene glycol ethyl ether. There is however information on read across substances that allow interpolation to predict the surface tension behaviour of this substance. In a guideline study, the a substance consisting of predominantly tri and tetraethylene glycol monobutyl ether was not found to be surface active. A solution of 1g/l in water produced a surface tension of 61.4mN/m at 20C. A study to assess the surface active properties of the substance 2-(2-(2 -methoxyyethoxy)ethoxy)ethanol found that the concentration response curve was not far from ideal (ie the curve was almost linear) indicating that it has very little surface activity. From the data in the study, it is possible to predict that the surface tension of a 0.1% solution is likely to be similar to that of pure water. By interpolation, it is possible to predict that the surface tension of a 0.1% solution of triethylene glycol ethyl ether in water will be tween 62 -71mN/m and is probably more likely to be closer to the latter. Further data to support this interpolation is attached to chapter 13 of the lead registrant's dossier.