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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:
02.08.2004
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
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
Surface tension:
41.8 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Surface tension of partially unsaturated TEA-Esterquat at a test concentration of 1 g/L and 20°C

No.

Time (min)

sg

measured (mN/m)

sg x Fb=s*

1. correction

(mN/m)

f

(Harkins & Jordan)1

s* x f=s

2. correction

(mN/m)

1

0

41.5

43.3

0.9590

41.5

2

5

41.8

43.6

0.9594

41.8

3

10

41.8

43.6

0.9594

41.8

4

15

41.9

43.7

0.9596

41.9

5

20

41.9

43.7

0.9596

41.9

6

25

41.9

43.7

0.9596

41.9

Surface tension: mean (mN/m)

41.8

Std. Deviation: (mN/m)

0.15

% Std. Dev.

0.36

1) Correction factors according to Harkins & Jordan: f include a specific apparatus correction factor given by the company ‘Krüss, wissenschaftliche Laborgeräte, Germany’

The mean surface tension of an aqueous solution of 1 g/L partially unsaturated was determined at 41.8 mN/m at 20°C. Because the test item shows a surface tension lower than 60 mN/m, the test item has surface active properties.

Conclusions:
The surface tension of partially unsaturated TEA-Esterquat was 41.8 mN/m at 20°C and 1 g/L (surface active).
Executive summary:

The surface tension of partially unsaturated TEA-Esterquat was examined in a study conducted according to OECD Guideline 115 and EU-Method A.5 (ring method). The mean surface tension of an aqueous solution of 1 g/L partially unsaturated TEA-Esterquat was determined at 41.8 mN/m at 20°C. Because the test item shows a surface tension lower than 60 mN/m, the test item has surface active properties.

Description of key information

41.8 mN/m at 20°C and 1 g/L (OECD TG 115 / EU method A.5, ring method); GLP; RL1

Key value for chemical safety assessment

Surface tension:
41.8
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The surface tension of partially unsaturated TEA-Esterquat was examined in a study conducted according to OECD Guideline 115 and EU-Method A.5 (ring method).The mean surface tension of an aqueous solution of 1 g/L partially unsaturated TEA-Esterquat was determined at 41.8 mN/m at 20°C. Because the test item shows a surface tension lower than 60 mN/m, the test item has surface active properties.

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