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EC number: 931-203-0 | CAS number: 1335202-88-4
Surface tension
Administrative data
Link to relevant study record(s)
- 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
- 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.
Reference
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.
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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