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EC number: 807-130-4 | CAS number: 53716-82-8
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:
- 09 Apr - 21 Jun 2014
- 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)
- Version / remarks:
- 27 July 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- 30 May 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- The Department of Health of the Government of the United Kingdom
- Type of method:
- ring method
- Key result
- Surface tension:
- 72.5 mN/m
- Temp.:
- 22 °C
- Conc.:
- 1 g/L
- Conclusions:
- A surface tension value of 72.5 mN/m at 22.0 ± 0.5°C for a nominal 1.0 g/L solutions was determined for the test substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.
Reference
Calibration factor
The readings, temperatures and the corresponding calibration factors for purified water are shown in the tables below.
Table 1: Sample 1
Reading (mN/m) |
Temperature (°C) |
Literature value (mN/m) |
Calibration factor |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
Mean calibration factor = 0.999
Table 2: Sample 2
Reading (mN/m) |
Temperature (°C) |
Literature value (mN/m) |
Calibration factor |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
72.5 |
22.0 |
72.41 |
0.999 |
Mean calibration factor = 0.999
Sample solution readings
The readings, times and temperatures for the sample solution are shown in the tables below
Table 3: Sample 1
Time (minutes) |
Reading (mN/m) |
Temperature (°C) |
126 |
72.5 |
22.0 |
142 |
72.5 |
22.0 |
156 |
72.5 |
22.0 |
171 |
72.5 |
22.0 |
185 |
72.5 |
22.0 |
Mean sample reading = 72.5 mN/m
Table 4: Sample 2
Time (minutes) |
Reading (mN/m) |
Temperature (°C) |
134 |
72.5 |
22.0 |
149 |
72.5 |
22.0 |
163 |
72.5 |
22.0 |
178 |
72.5 |
22.0 |
191 |
72.5 |
22.0 |
Mean sample reading = 72.5 mN/m
Summary
Sample 1: 72.5 mN/m
Sample 2: 72.5 mN/m
Mean: 72.5 mN/m
Temperature: 22.0 ± 0.5°C
pH of sample solution: Sample 1 = 5.17; Sample 2 = 4.70
Conclusion:
The mean surface tension of duplicate nominal 1.0 g/L solutions of test item in water has been determined to be 72.5 mN/m at 22.0 ± 0.5°C (individual replicate values being 72.5 and 72.5 mN/m). The test item is considered not to be a surface-active item.
Description of key information
Surface tension: 72.5 mN/m at 22.0 ± 0.5°C for a nominal 1.0 g/L solution (OECD 115)
Key value for chemical safety assessment
Additional information
A surface tension value of 72.5 mN/m at 22.0 ± 0.5°C for a nominal 1.0 g/L solution was determined for the submission substance using the ring method in accordance with OECD Test Guideline 115 and in compliance with GLP. The result is considered to be reliable. At the nominal concentration tested, it is expected that the measured surface tension is for the Gem Diol form of the submission substance.
A surface tension value of 33.6 mN/m for the neat product was reported for Cyrene™ (Pers. comm). No further information is available and no reliability could be assigned.
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