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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2011-07-07 to 2011-07-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Well performed GLP study in accordance with EU Method A.5 (Surface Tension).
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: PFW100113
- Analytical purity: 99.3% (by GC)

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: the sample is stored in cool, well-ventilated storage area prior to testing.

OTHER SPECIFICS:
- Name of test material (as cited in study report): Jeffcat DMDEE
- Physical state: Liquid
Surface tension:
67.7 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: The surface tension result is corrected for water calibration. Solution age was 15 minutes for test No 1 and 35 minutes for test No 2.

Calibration:

The measured value of the surface tension of water: 66.0 mN/m

EC standard reading for surface tension of water: 72.75 mN/m

Calibration factor is: 72.75/66.0 = 1.102

The calibration factor is determined by measuring the surface tension of water and comparing the value obtained in literature. The corrected value is taken from a table compiled on the basis of the Harkin-Jordan correction.

The duplicate runs provided identical results.

Conclusions:
The surface tension of the substance was determined to be 67.7 mN/m at a test concentration of 1 g/L and at 20 °C. The substance is concluded not to have surface active properties.

Description of key information

The surface tension of DMDEE was determined, in a GLP study according to test method EC A.5, to be 67.7 mN/m at a test concentration of 1 g/L and at 20 °C, following the ring method (Younis, 2011).

Key value for chemical safety assessment

Surface tension:
67.7
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The substance is concluded not to have surface active properties.