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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:
2017-11-30 to 2017-12-21
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
1995
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
OECD harmonised ring method
Key result
Surface tension:
56.33 mN/m
Temp.:
20.1 °C
Conc.:
90 other: % saturated solution
Remarks on result:
other: Concentration not analytically determined

Table 1: Surface Tension, Temperature

Measurement

Time 2)

[min]

Time 3)

[min]

Surface Tension [mN/m]

Temperature

1

206.86

187.12

56.40

20.1

2

207.59

187.85

56.40

20.0

3

208.31

188.58

56.37

20.1

4

209.05

189.32

56.35

20.0

5

209.79

190.06

56.32

20.0

6

210.54

190.80

56.32

20.0

7

21 1 .30

191.57

56.30

20.1

8

212.04

192.31

56.31

20.1

9

212.78

193.04

56.27

20.0

10

213.51

193.77

56.28

20.1

Mean

 

 

56.33

20.1

SD

 

 

0.05

0.1

SD = standard deviation

1)        of the last 10 measurements

2)        Time from transfer of test solution into test vessel until end of each measurement

Time from start of measurement until end of each measurement

Conclusions:
The surface tension of a 90% saturated aqueous solution of the test item Compimide 183 was determined to be 56.33 mN/m (standard deviation ± 0.05 mN/m) at 20°C.
Considering that distilled water has a surface tension of 72.75 mN/m at 20°C and the test item showed a surface tension below 60 mN/m under the conditions of this referring method, the test item should be regarded as being surface-active material.

Description of key information

- Study conducted according to OECD guideline 115 (1995), the surface tension was determined using the harmonized ring method, the surface tension of a 90% saturated aqueous solution of Compimide 183 is considered to be 56.33 mN/m at 20°C.

Key value for chemical safety assessment

Surface tension:
56.33

Additional information

According to OECD guideline 115 (1995) the surface tension of a 90% saturated aqueous solution of the test item Compimide 183 was determined to be 56.33 mN/m (standard deviation ± 0.05 mN/m) at 20°C.

Considering that distilled water has a surface tension of  72.75 mN/m at 20°C and the test item showed a surface tension below 60 mN/m under the conditions of this referring method, the test item should be regarded as being surface-active material.