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EC number: 500-343-0 | CAS number: 157627-92-4 1 - 2.5 moles ethoxylated
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:
- 5 July 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- GLP compliance:
- no
- Type of method:
- ring method
- Surface tension:
- 34.5 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 000 mg/L
Reference
Details:
Water calibration:
Water calibration: Temp. = 20 °C, density = 0.998 g/cm³
Surface tension of purified water, mN/m |
|
Value 1 |
71.7 |
Value 2 |
71.7 |
Value 3 |
71.7 |
Value 4 |
71.7 |
Value 5 |
71.8 |
Value 6 |
71.7 |
Arithmetic mean |
71.7 |
Standard deviation |
0.0 |
Arithmetic mean 71.7 mN/m, standard deviation 0.0 mN/m from the last 6 measurements (theoretical value: 72.4 mN/m →correction factor 1.0098)
First test solution
(c = 1029 mg/L), Temp. = 20 °C, density = 0.998 g/cm³, age of solution = 206 min)
Surface tension of solution 1, mN/m |
|
Value 1 |
34.1 |
Value 2 |
34.2 |
Value 3 |
34.1 |
Value 4 |
34.1 |
Value 5 |
34.1 |
Value 6 |
34.2 |
| Arithmetic mean | 34.1 |
| Standard deviation | 0.1 |
Arithmetic mean 34.1 mN/m, standard deviation 0.1 mN/m from 6 measurements
Second test solution
(c = 1128 mg/L), Temp. = 20 °C, density = 0.998 g/cm³, age of solution = 282 min)
Surface tension of solution 2, mN/m |
|
Value 1 |
34.2 |
Value 2 |
34.2 |
Value 3 |
34.2 |
Value 4 |
34.1 |
Value 5 |
34.1 |
Value 6 |
34.2 |
| Arithmetic mean | 34.2 |
| Standard deviation | 0.0 |
Arithmetic mean 34.2 mN/m, standard deviation 0.0 mN/m from 6 measurements
Arithmentic mean of two test solutions: 34.2 mN/m (+ 0.1 mN/m)
Arithmetic mean corrected by calibration factor
determined via water calibration: 34.5 mN/m
Description of key information
34.5 mN/m at 20 °C and concentration 1 g/L (EU A.5)
Key value for chemical safety assessment
- Surface tension:
- 34.5
- in mN/m at 20°C and concentration in mg/L:
- 1 000
Additional information
The substance is surface active.
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