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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Surface tension

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Administrative data

Link to relevant study record(s)

Description of key information

Measurement of the surface tension of an aqueous solution of PDTN at a concentration of 1.04 g/L at a temperature of 20°C showed a value of 72.9 mN/m. This is nearly the same surface tension as water has. Based on the molecular structure a study for this endpoint could, however, be waived as nohydrofobic tail is present. 

Key value for chemical safety assessment

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

Additional information

According to the criteria as outlined in the EEC Directive, substances showing a surface tension lower than 60 mN/ m under the conditions of this method, should be regarded as being surface active materials.