Registration Dossier
Registration Dossier
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EC number: 616-639-9 | CAS number: 78620-07-2
Surface tension
Administrative data
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: conducted to OECD/EC guidelines with GLP
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
- Report date:
- 2008
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- yes
- Principles of method if other than guideline:
- Deviation: The surface tension was not corrected using the Harkins-Jordan correction table as the correction is not applicable to the apparatus used. Once calibrated, the balance and ring assembly used in this test give a direct reading for surface tension that is within the required accuracy (+/- 0.5 mN/m); this is as a result of the reduced ring dimensions.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
Test material
- Details on test material:
- - Name of test material (as cited in study report): Hydroxyphosponoaceic acid, trisodium salt (TK13061/2)
- Physical state: Solid (white powder)
- Lot/batch No.: LIC 613/04
- Storage condition of test material: Room temperature in the dark
Constituent 1
Results and discussion
Surface tension
- Surface tension:
- 71.5 mN/m
- Temp.:
- 20 °C
- Conc.:
- 0.999 g/L
Any other information on results incl. tables
Reading, times and temperatures for Trisodium [carboxy(oxido)methyl]phosphonate are shown in the following table:
| Time (min) | Reading (mN/m) | Temperature (C ) |
| 65 | 71.5 | 19.8 |
| 75 | 71.0 | 19.8 |
| 85 | 71.0 | 19.8 |
| 95 | 71.0 | 19.8 |
| 105 | 71.0 | 19.8 |
| 115 | 72.0 | 20.0 |
mean reading: 71.3 mN/m
Surface tension = reading x calibration factor
= 71.3 x 1.004
= 71.5 mN/m
Applicant's summary and conclusion
- Conclusions:
- The surface tension of a 0.999 g/L solution of Trisodium [carboxy(oxido)methyl]phosphonate has been determined to be 71.5 mN/m at 20.0 +/- 0.5C. The test material is considered not to be a surface-active material.
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