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EC number: 949-054-5 | CAS number: -
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:
- 20 July 2018 to 24 October 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Date of Inspection: 18 July 2017 to 20 July 2017 Date on Certificate: 28 November 2017
- Type of method:
- ring method
- Key result
- Surface tension:
- 62.7 mN/m
- Temp.:
- 20.4 °C
- Conc.:
- 9 097.1 mg/L
- Conclusions:
- The surface tension of duplicate, 90 % saturated solutions of test item in water has been determined to be 62.7 mN/m at 20.4 ± 0.5 °C. The test item was considered not to be surface-active.
- Executive summary:
The surface tension of duplicate, 90 % saturated solutions of test item in water has been determined to be 62.7 mN/m at 20.4 ± 0.5 °C, using a ring method, designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered not to be surface-active.
Reference
The readings, times and temperatures for the sample solutions are shown in the following tables.
Table 2 - Sample 1
Age of solution (min) |
Reading (mN/m) |
Temperature (°C) |
68 |
62.5 |
20.4 |
72 |
63.0 |
20.4 |
76 |
63.0 |
20.4 |
80 |
63.0 |
20.4 |
84 |
63.0 |
20.4 |
88 |
63.0 |
20.4 |
Table 3 - Sample 2
Age of solution (min) |
Reading (mN/m) |
Temperature (°C) |
119 |
62.5 |
20.4 |
122 |
62.5 |
20.4 |
125 |
62.0 |
20.4 |
129 |
62.5 |
20.4 |
132 |
62.5 |
20.4 |
Mean Sample 1 result: 63.0 mN/m
pH of Sample 1: 4.6
Mean Sample 2 result: 62.4 mN/m
pH of Sample 2: 4.5
Mean result: 62.7 mN/m
Overall temperature: 20.4 ± 0.5 °C
On removal from the 20 °C equilibration, the samples were clear, colorless solutions, with undissolved test item at the top of the solutions and stuck to the sides of the flask. After clean-up, the samples were clear, colorless solutions free from undissolved test item.
According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.
Description of key information
The surface tension of duplicate, 90 % saturated solutions of test item in water has been determined to be 62.7 mN/m at 20.4 ± 0.5 °C. The test item was considered not to be surface-active.
Key value for chemical safety assessment
- Surface tension:
- 62.7
- in mN/m at 20°C and concentration in mg/L:
- 9 097.1
Additional information
The surface tension of duplicate, 90 % saturated solutions of test item in water has been determined to be 62.7 mN/m at 20.4 ± 0.5 °C, using a ring method, designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered not to be surface-active.
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