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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:
2017-2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Key result
Surface tension:
39.6 mN/m
Temp.:
20 °C
Conc.:
1 g/L

The readings, times and temperatures for the sample solutions are shown in the following tables:

 Sample 1

Age of Solution (min)

Reading (mN/m)

Temperature (°C)

69

39.5

20.6

78

39.5

20.6

88

40.0

20.6

112

39.5

20.6

129

39.5

20.6

 

 Sample 2

Age of Solution (min)

Reading (mN/m)

Temperature (°C)

151

39.5

20.6

163

39.5

20.8

174

39.5

20.8

185

39.5

21.0

210

39.5

21.0

 

Mean Sample 1 result :

39.6 mN/m

pH of Sample 1:

7.01

Mean Sample 2 result :

39.5 mN/m

pH of Sample 2 :

7.02

Mean result                            

39.6 mN/m

 

 

Overall temperature                           

20.7 ±0.5 ºC

 

 

Conclusions:
The surface tension at nominally 1 g/L of test item in water has been determined to be 39.6 mN/m at 20.7 ±0.5 °C. The test item was considered to be surface-active.
Executive summary:

The determination of the surface tension of the test item was carried out by a ring method, using a procedure designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.

The surface tension at nominally 1 g/L of test item in water has been determined to be 39.6 mN/m at 20.7 ±0.5 °C. The test item was considered to be surface-active.

Description of key information

The surface tension at nominally 1 g/L of test item in water has been determined to be 39.6 mN/m at 20.7 ±0.5 °C. The test item was considered to be surface-active

Key value for chemical safety assessment

Surface tension:
39.6
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information