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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:
14 November 2016 to 18 January 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Key result
Surface tension:
72.5 mN/m
Temp.:
21.4 °C
Conc.:
1 000 mg/L
Remarks on result:
other: active ingredient

TABLE 7 – READINGS, TIMES AND TEMPERATURES FOR SAMPLE 1

Age of solution (min)

Reading (mN/m)

Temperature (°C)

80

73.0

21.2

92

73.0

21.2

103

73.0

21.2

115

73.0

21.2

124

73.0

21.2

 

TABLE 8 – READINGS, TIMES AND TEMPERATURES FOR SAMPLE 2

Age of solution (min)

Reading (mN/m)

Temperature (°C)

1445

72.0

21.6

1459

72.5

21.4

1476

72.5

21.4

1489

72.0

21.4

1502

72.5

21.4

1515

72.5

21.6

 

Mean Sample 1 result: 73.0 mN/m (pH 7.9)

Mean Sample 2 result: 72.3 mN/m (pH 7.5)

Mean result: 72.5±0.5 mN/m

Overall temperature: 21.4 ± 0.5 °C

Conclusions:
The surface tension of solutions prepared at a nominal 1.7 g/L of test item in water (approximately 1 g/L active ingredient) was determined to be 72.5 ± 0.5 mN/m at 21.4 ± 0.5 °C. The substance was not considered to be surface-active.
Executive summary:

GUIDELINE

The determination 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.

 

RESULTS

The surface tension of solutions prepared at a nominal 1.7 g/L of test item in water (approximately 1 g/L active ingredient) was determined to be 72.5 ± 0.5 mN/m at 21.4 ± 0.5 °C. The substance was not considered to be surface-active.

Description of key information

The surface tension of research material solutions prepared at a nominal 1.7 g/L of test item in water (approximately 1 g/L active ingredient) was determined to be 72.5±0.5 mN/m at 21.4 ± 0.5 °C. The substance was not considered to be surface-active (OECD 115 and EU Method A.5).

Key value for chemical safety assessment

Surface tension:
72.5
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

GUIDELINE

The determination 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.

 

RESULTS

The surface tension of research material solutions prepared at a nominal 1.7 g/L of test item in water (approximately 1 g/L active ingredient) was determined to be 72.5±0.5 mN/m at 21.4 ± 0.5 °C. The substance was not considered to be surface-active.