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EC number: 248-383-5 | CAS number: 27277-00-5
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- The study was carried out in a laboratory accredited under GLP, however the study itself was not subject to GLP audit. The study followed OECD TG 115 (1995) and Method A5 in Regulation (EC) No 440/2008 without deviations.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- GLP compliance:
- no
- Surface tension:
- 63.3 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
- Remarks on result:
- other: pH 6.7-6.8
- Conclusions:
- The average surface tension of duplicate 1.0 g/L solutions of test item in water has been determined to be 63.3 mN/m at 20.0 ± 0.5 °C.
- Executive summary:
To determine the surface tension of the test item a harmonised ring method study was performed according to OECD TG 115 (1995) and Method A5 in Regulation (EC) No 440/2008. In this study the average surface tension of duplicate 1.0 g/L solutions of test item in water has been determined to be 63.3 mN/m at 20.0 ± 0.5 °C.
Reference
Sample solution A surface tension measurements:
Time (mins) |
Temperature (°C) |
Reading (mN/m) |
117 |
20.0 |
64.0 |
145 |
20.0 |
63.5 |
173 |
20.0 |
63.5 |
200 |
20.0 |
63.5 |
226 |
20.0 |
63.5 |
251 |
20.0 |
63.5 |
Mean sample reading = 63.5 * |
||
* Last five values considered to be a stable plateau of surface tension readings and therefore used in the calculation of the mean.
Sample solution B surface tension measurements:
Time (mins) |
Temperature (°C) |
Reading (mN/m) |
129 |
20.0 |
63.5 |
158 |
20.0 |
63.5 |
187 |
20.0 |
63.5 |
212 |
20.0 |
63.5 |
238 |
20.0 |
63.5 |
264 |
20.0 |
63.5 |
Mean sample reading = 63.5 |
||
Surface tension = reading x calibration factor
- Sample Solution A = 63.5 x 0.996
- Sample Solution A = 63.2 mN/m
- Sample Solution B = 63.5 x 0.997
- Sample Solution B = 63.3 mN/m
Water calibration data relevant to sample dolution A:
Reading (mN/m) |
Temperature (°C) |
Literature Value (mN/m) |
Calibration Factor |
72.5 |
20.0 |
72.72 |
1.003 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
Mean calibration factor = 0.996 * |
|||
* Calculated using the last six calibration factor values which bracket the sample solution reading values used in the definitive test result.
Water calibration data relevant to sample dolution B:
Reading (mN/m) |
Temperature (°C) |
Literature Value (mN/m) |
Calibration Factor |
72.5 |
20.0 |
72.72 |
1.003 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
73.0 |
20.0 |
72.72 |
0.996 |
Mean calibration factor = 0.997 |
|||
Description of key information
63.3 mN/m at 20 °C, OECD 115, GLP, ring method (torsion balance), O'Connor 2015
Key value for chemical safety assessment
- Surface tension:
- 63.3
- in mN/m at 20°C and concentration in mg/L:
- 1 000
Additional information
The average surface tension of duplicate 1.0 g/L solutions of test item in water has been determined to be 63.3 mN/m at 20.0 ± 0.5 °C.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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