Registration Dossier
Registration Dossier
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EC number: 608-630-3 | CAS number: 31528-46-8
Surface tension
Administrative data
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 22 December 2017 - 07 June 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:
- (1R,3aS,3bR,9aR,9bS,11aS)-1-ethynyl-1-hydroxy-11a-methyl-1H,2H,3H,3aH,3bH,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one
- EC Number:
- 608-630-3
- Cas Number:
- 31528-46-8
- Molecular formula:
- C20H24O2
- IUPAC Name:
- (1R,3aS,3bR,9aR,9bS,11aS)-1-ethynyl-1-hydroxy-11a-methyl-1H,2H,3H,3aH,3bH,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one
- Test material form:
- solid: particulate/powder
- Details on test material:
- Appearance: Off-white powder
Test item storage: At room temperature
Constituent 1
Results and discussion
Surface tension
- Key result
- Surface tension:
- 73.2 mN/m
- Temp.:
- 20 °C
- Remarks on result:
- other: Conc. is 90% of test item saturation solubility in water
Any other information on results incl. tables
Calibration Experiments (with double distilled water)
Measurement |
Time passed after transfer calibration solution to test vessel |
Surface tension |
|
individual |
mean |
||
1 |
15 |
70.9 |
71.1 |
2 |
16 |
70.9 |
|
3 |
17 |
71.4 |
|
4 |
18 |
71.0 |
|
5 |
19 |
71.1 |
|
The calibration factor (Φb) was calculated to be 1.02.
Table: Surface tension measurements
Measurement |
Time passed after transfer test solution to test vessel |
Surface tension |
||
individual |
mean |
mean multiplied by |
||
1 |
15 |
71.8 |
71.8 |
73.2 |
2 |
16 |
72.0 |
|
|
3 |
17 |
71.5 |
|
|
4 |
18 |
72.0 |
|
|
5 |
19 |
71.5 |
|
|
Applicant's summary and conclusion
- Conclusions:
- The surface tension of an aqueous solution of the substance at 90% of its saturation solubility in water was determined to be 73.2 mN/m (at 20°C).
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