Registration Dossier
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EC number: 292-222-1 | CAS number: 90583-23-6
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:
- 27 Jan 2015
- 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:
- 31.5 mN/m
- Temp.:
- 20.5 °C
- Conc.:
- 1 g/L
- Remarks on result:
- other: mean temperature of two measurements
Reference
Details:
Water calibration:
Water calibration: Temp. = 20 °C, density = 0.998 g/cm³
Surface tension of purified water [mN/m] |
|
Value 1 |
71.9 |
Value 2 |
72.0 |
Value 3 |
72.0 |
Value 4 |
72.1 |
Value 5 |
72.0 |
Arithmetic mean |
72.0 |
Standard deviation |
0.1 |
Arithmetic mean 72.0 mN/m, standard deviation 0.01 mN/m (theoretical value: 72.4 mN/m →correction factor 1.0056)
First test solution
(c = 0.957 g/L, Temp. = 21 °C, density = 0.998 g/cm³, age of solution = 42 min)
Surface tension of the solution [mN/m] |
|
Value 1 |
30.9 |
Value 2 |
30.9 |
Value 3 |
30.9 |
Value 4 |
30.9 |
Value 5 |
30.9 |
Arithmetic mean |
30.9 |
Standard deviation |
0.0 |
Arithmetic mean 30.9 mN/m, standard deviation 0.0 mN/m
Second test solution
(c = 1.03 g/L, Temp. = 20 °C, density = 0.998 g/cm³, age of solution = 60 min)
Surface tension of the solution [mN/m] |
|
Value 1 |
31.8 |
Value 2 |
31.8 |
Value 3 |
31.8 |
Value 4 |
31.8 |
Value 5 |
31.8 |
Arithmetic mean |
31.8 |
Standard deviation |
0.0 |
Arithmetic mean 31.8 mN/m, standard deviation 0.0 mN/m
By adjusting the temperature setting of the tensiometer, differences in the density of the liquid can be compensated automatically.
Arithmetic mean of two test solutions: 31.4 mN/m (+ 0.6 mN/m)
Arithmetic mean corrected by calibration factor
determined via water calibration: 31.5 mN/m
Description of key information
31.5 mN/m at 20.5 °C, concentration 1 g/L
Key value for chemical safety assessment
- Surface tension:
- 31.5
- in mN/m at 20°C and concentration in mg/L:
- 1 000
Additional information
The surface tension was determined by the ring method according to EU test method A.5. The substance is surface active.
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