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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-09-14 to 2016-01-14
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was carried out in a laboratory accredited under GLP, however the study itself was not subject to GLP audit. The study followed OECD TG 115 (1995) and Method A5 (EC) No 440/2008 without deviations.
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Key result
Surface tension:
65.7 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Table 1 Sample Solution A Preparation Details

 Sample Preparation

 Time (mins)
 An aliquot (0.1096 g) of test item was diluted to 100 mL with high purity water.

 0 to 5
 The sample solution was transferred to the measuring vessel.

15

Table 2 Sample Solution B Preparation Details

 Sample Preparation

 Time (mins)
 An aliquot (0.1076 g) of test item was diluted to 100 mL with high purity water.

 0 to 5

 The sample solution was transferred to the measuring vessel.

 15

Table 3 Water Calibration Data relevant To Sample Solution A

 Reading (mN/m)  Temperature (ºC)  Literature Value (mN/m)  Calibration Factor
 72.0  19.8  72.75  1.010
 72.0  19.8  72.75  1.010
 72.0  19.8  72.75  1.010
 72.0  19.8  72.75  1.010
 72.0  19.8  72.75  1.010
 72.0  19.8  72.75  1.010
     Mean Calibration Factor:  1.010

Table 4 Water Calibration Data relevant To Sample Solution B

 Reading (mN/m)  Temperature (ºC)  Literature Value (mN/m)  Calibration Factor
 72.5 20.0  72.72  1.003
 72.5 20.0  72.72  1.003
 72.5 20.0  72.72  1.003
 72.5 20.0  72.72  1.003
 72.5 20.0  72.72  1.003
 72.5 20.0  72.72  1.003
    Mean Calibration Factor:   1.003

Table 5 Sample Solution A Surface Tension Measurements

Time (mins)  Temperature (°C)  Reading (mN/m)
 80  19.8 65.0
 91  19.8 65.0
 102  19.8 65.0
 112  19.8 65.0
 123  19.8 65.0
   Mean Sampling Reading: 65.0

Table 6 Sample Solution B Surface Tension Measurements

Time (mins)  Temperature (°C)  Reading (mN/m)
 137 20.0 65.5
 148 20.0 65.5
156 20.0  65.5
 170 20.0  65.5
 178 20.0 65.5
    Mean Sampling Reading: 65.5
Conclusions:
In a reliable and conclusive study according to OECD TG 115 (1995) and EU Method A5 (2008), the average surface tension of duplicate solutions of the test item in water has been determined to be 65.7 mN/m at 20.0 ± 0.5 °C.
Executive summary:

The determination of the surface tension of an aqueous solution of the test item was based on the OECD Guideline No. 115 "Surface Tension of Aqueous Solutions" (1995).

The average surface tension of duplicate 1.0 g/L solutions of test item in water has been determined according to the ring method to be 65.7 mN/m at 20.0 ± 0.5 °C.

Description of key information

In a reliable and conclusive study according to OECD TG 115, the average surface tension of duplicate solutions of the test item in water has been determined to be 65.7 mN/m at 20.0 ± 0.5 °C.

Key value for chemical safety assessment

Surface tension:
65.7
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information