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EC number: 220-298-8 | CAS number: 2706-75-4
Surface tension
Administrative data
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Experimental starting date: 28 March 2017. Experimental completion date: 22 June 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
Test material
- Reference substance name:
- Sodium glyoxylate
- EC Number:
- 220-298-8
- EC Name:
- Sodium glyoxylate
- Cas Number:
- 2706-75-4
- Molecular formula:
- C2H2O3.Na
- IUPAC Name:
- sodium oxoacetate
Constituent 1
- Specific details on test material used for the study:
- Identification: Safelink SPM-01
Appearance/Physical state: colorless to slightly yellow powder
Batch: G150201
Purity: 99.9%
Expiry date: not supplied
Storage conditions: room temperature, in the dark
Results and discussion
Surface tension
- Key result
- Surface tension:
- >= 74 - <= 75 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
Any other information on results incl. tables
Results
The readings, times and temperatures for the sample solutions are shown in the following
tables:
Sample 1
| Age of Solution (min) | Reading (mN/m) | Temperature (°C) |
| 71 | 74.5 | 20.2 |
| 78 | 74.5 | 20.2 |
| 85 | 74.5 | 20.2 |
| 92 | 74.5 | 20.2 |
| 100 | 75 | 20.2 |
Sample 2
| Age of Solution (min) | Reading (mN/m) | Temperature (°C) |
| 132 | 74 | 20.2 |
| 139 | 74 | 20.2 |
| 145 | 74.5 | 20.2 |
| 152 | 74.5 | 20.2 |
| 160 | 74.5 | 20.2 |
Mean Sample 1 result : 74.6 mN/m pH of Sample 1 : 6.3
Mean Sample 2 result : 74.3 mN/m pH of Sample 2 : 6.3
Overall result : 74.5 ± 0.5 mN/m
Overall temperature : 20.0 ± 0.5 ºC
Discussion
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.
Applicant's summary and conclusion
- Conclusions:
- The surface tension of a solution of test item in water at a nominal 1 g/L has been determined
to be 74.5 ± 0.5 mN/m at 20.0 ± 0.5 °C. The test item was considered to be not surface active. - Executive summary:
74.5 ± 0.5 mN/m at 20.0 ± 0.5 °C (nominal 1 g/L solution), using a ring
method, designed to be compatible with Method A5 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 to be not surface-active.
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