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EC number: 948-055-8 | CAS number: -
Surface tension
Administrative data
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 13 March 2018 - 27 March 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Version / remarks:
- 1995
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- OECD harmonised ring method
Test material
- Reference substance name:
- Extract obtained from the shell of Theobroma cacao (Malvaceae) by co-extraction with ethanol and propylene glycol
- EC Number:
- 948-055-8
- Molecular formula:
- not applicable as it is a UVCB
- IUPAC Name:
- Extract obtained from the shell of Theobroma cacao (Malvaceae) by co-extraction with ethanol and propylene glycol
- Test material form:
- liquid: viscous
- Details on test material:
- - Physical appearance: dark brown to black viscous liquid
- Storage conditions: in refrigerator (2-8°C) protected from light
Constituent 1
Results and discussion
Surface tension
- Key result
- Surface tension:
- 70.6 mN/m
- Temp.:
- 20 °C
- Remarks on result:
- other: Conc.= 90% of test item saturation solubility
Any other information on results incl. tables
Table: Surface tension measurements
Measurement |
Time passed after transfer test solution to test vessel |
Surface tension |
||
individual |
mean |
mean (2) |
||
1 |
15 |
71.2 |
70.0(1) |
70.6 |
2 |
16 |
71.2 |
|
|
3 |
17 |
70.1 |
|
|
4 |
18 |
70.0 |
|
|
5 |
19 |
70.2 |
|
|
6 |
20 |
69.8 |
|
|
7 |
21 |
69.9 |
|
|
(1)Mean calculated from measurements 3 to 7, after equilibrium was reached.
(2) Mean multiplied by the calibration factor and Harkins-Jordan corrected.
Applicant's summary and conclusion
- Conclusions:
- The surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 70.6 mN/m (at 20°C).
- Executive summary:
Using the OECD harmonized ring method in a GLP study according to EC A.5 and OECD 115, the surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 70.6 mN/m (at 20°C). According to the EC A.5 guideline the substance is not surface active.
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