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EC number: 229-390-2 | CAS number: 6505-30-2
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- GLP compliance:
- yes (incl. QA statement)
- Other quality assurance:
- other: SOP-LA-051
- Remarks:
- Determination of the surafce tension of aqueous liquids
- Type of method:
- ring method
- Surface tension:
- 50.36 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 013.4 mg/L
- Remarks on result:
- other: Total mean value of two measurements.
- Conclusions:
- The test item has a mean surface tension of 50.36 mN/m at 20°C. Thus, the test item is to be regarded as surface active according to regulation EC No. 440/2008 Part A Method A.5.
- Executive summary:
According to OECD Test Guideline 115 and Regulation EC No. 440/2008 Part A Method A.5. the surface tension at 20 °C of test item Hydrogen [4-[[4-diethylamino)phenyl][4-[ethyl[(3-sulphonatobenzyl)amino]-o-tolyl]methylene]-3-methylcylohexa-2,5-dien-1-ylidene](ethyl)3-sulphonatobenzyl)ammonium, sodium salt was determined to be 50.36 mN/m
According to Regulation EC No. 440/2008 Part A Method A.5. the test item is to be regarded as surface active material.
Reference
The results of two measurements are summarized in Table 6.
Table 6: Measured surface tension values
| Value No | 1st Measurement (20 min after preparing the solution) σ [mN/m] |
2nd Measurement (35 min after preparing the solution) σ [mN/m] |
| 1 | 50.65 |
50.20 |
| 2 | 50.62 | 50.17 |
| 3 | 50.59 | 50.14 |
| 4 | 50.56 | 50.12 |
| 5 | 50.54 | 50.09 |
| 6 | 50.52 | 50.07 |
| Mean value of the individual values | 50.58 ± 0.06 | 50.13 ± 0.11 |
| Total mean values | 50.36 ± 0.23 |
|
The test item has a mean surface tension of 50.36 mN/m. Thus, the test item is to be regarded as surface active according to regulation EC No. 440/2008 Part A Method A.5.
Description of key information
The test item has a mean surface tension of 50.36 mN/m at 20°C. Thus, the test item is to be regarded as surface active according to regulation EC No. 440/2008 Part A Method A.5.
Key value for chemical safety assessment
- Surface tension:
- 50.36
- in mN/m at 20°C and concentration in mg/L:
- 1 013.4
Additional information
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