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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:
18 November - 18 December 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
yes
Type of method:
ring method
Surface tension:
31.9 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Results of water calibration: Correction factor for the instrument is 1.0084

First test solution: c= 99.1 mg/L, T = 20 deg C, p = 0.998 g/cm3, age of solution = 133 min.

 Repeat  Surface tension (mN/m)
 1  31.7
 2  31.6
 3  31.6
 4  31.6
 5  31.5
 6  31.7
 Arithmetic mean  31.6
 standard deviation  0.1

Second test solution: c= 100.0 mg/L, T= 20 deg C, p = 0.998 g/cm3, age of solution = 216 min

 Repeat  Surface tension (mN/m)
 1  31.7
 2  31.7
 3  31.7
 4  31.6
 5  31.6
 6  31.7
 Arithmetic mean  31.7
 standard deviation  0.1

Surface tension (arithmetic mean of two test solutions) = 31.7 mN/m (+/- 0.1 mN/m)

Surface tension (corrected by calibration factor) = 31.9 mN/m

Conclusions:
The test item has a surface tension of 31.9 mN/m at 1 g/L
Executive summary:

The surface tension of the test item was determined according to EU Method A.5 (ring method). The surface tension was 31.9 mN/m at 1 g/L.

Description of key information

The surface tension of the test item was determined according to EU Method A.5 (ring method). The surface tension was 31.9 mN/m at 1 g/L.

Key value for chemical safety assessment

Surface tension:
31.9
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information