Registration Dossier
Registration Dossier
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EC number: 427-240-2 | CAS number: 134841-35-3
Surface tension
Administrative data
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 29 October 1996 - 12 February 1997
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: EC Directive 92/69 Annex V mrthod A.5 OECD Guideline 115 (1995)
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 997
- Report date:
- 1997
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
Test material
Reference
- Name:
- Unnamed
- Type:
- Constituent
Results and discussion
Surface tension
- Surface tension:
- 71.12 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
Any other information on results incl. tables
Results of tensiometer readings are listed in Table 2 (liChrosolv.water) and Table 3 (solutio of the test substance).
Table2: Tensiometer readings (5 determinations and mean) of LiChrosolv(R)-water at 20°C.
| Determination | Tensiometer readings (mN/m) |
| 1st | 72.4 |
| 2nd | 72.3 |
| 3rd | 72.5 |
| 4th | 72.3 |
| 5th | 72.2 |
| mean | 72.34 |
| Sd | 0.11 |
Calculated #: 72.75/72.34=1.0057
Table 3: Tensiometer readings 810 determination and mean) of the test substance solution (1g/l) at 20°C.
| Determination | Time after 1st determination(min) | Tensiometer readings (mN/m)"D-VAL-DANE" solution (1g/l) |
| 1st | 0 | 70.8 |
| 2nd | 5 | 70.9 |
| 3rd | 15 | 70.9 |
| 4th | 75 | 70.8 |
| 5th | 90 | 70.8 |
| 6th | 105 | 70.8 |
| 7th | 165 | 70.8 |
| 8th | 285 | 70.9 |
| 9th | 345 | 70.8 |
| 10th | 405 | 70.8 |
| mean | - | 70.83 |
| SD | - | 0.05 |
No time dependence of the surface tension of the test substance solution was observed within a time period of 6.75 hours.
Mathematical corrections of the tensiometer readings:
Calculated mean experimental value: 70.83 x 1.0057 = 71.23 mN/m
Correction according to DIN 53914:71.23 1.0756 x 0.7232 9 71.12 mN/m
Mean surface tension of the test substance solution +/- standard deviation_: 71.12 mN/m+/-0.05
Applicant's summary and conclusion
- Conclusions:
- Mean of 10 determinations: 71.12 mN/m
Standard deviation: 0.05mN/m
(Temperature: 20°C, concentration: 1g/l)
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