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EC number: 458-680-3 | CAS number: 797751-44-1 WASOX-VMAC2
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- March 9, 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- According to OECD Guideline 115, with GLP.
- 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
- Type of method:
- ring method
- Key result
- Surface tension:
- 69.06 mN/m
- Temp.:
- 20 °C
- Conc.:
- 900 mg/L
- Conclusions:
- The mean surface tension of the degradation products of the test substance was 69.061 mN/m at a temperature of 20.0 °C.
- Executive summary:
The Surface Tension assay performed according to OECD guideline nº 115 (ring method) shows that the mean surface tension of the degradation products of the test substance is 69.061 mN/m at a temperature of 20.0 °C.
Reference
The test substance is composed of several compounds, including the 3 main components VMAC2, VAC3 and VM2AC. The test substance degrades rapidly with a half-life time of <1 hour at 25 °C. Therefore the surface tension of the degradation products of the test substance was determined.
The surface tension increased during the first determinations and remained constant afterwards. The mean value was therefore calculated from the determinations obtained 3 h 45 minutes after the preparation and later. The age of the surface was 2 h to 5 h.
The results of the determinations of water are listed in Table1.
The results of the determinations of the aqueous solution of the test substance are listed in Table2.
Table1: Surface tension of water
tensiometer readings (mN/m) |
mean (mN/m) |
calculatedF |
71.5 |
71.5 |
1.017 |
71.5 |
||
71.5 |
Table2: Surface tension of the test substance solution
|
age of the surface of the test substance solution |
|
|
|
1 |
02:00 |
65.9 |
67.05 |
66.68 |
2 |
02:30 |
66.8 |
67.97 |
67.67 |
3 |
03:00 |
67.4 |
68.58 |
68.33 |
4 |
03:30 |
67.8 |
68.99 |
68.77 |
5 |
03:45 |
68.0 |
69.19 |
68.99 |
6 |
04:00 |
68.0 |
69.19 |
68.99 |
7 |
04:15 |
68.1 |
69.29 |
69.10 |
8 |
04:30 |
68.0 |
69.19 |
68.99 |
9 |
04:45 |
68.2 |
69.39 |
69.21 |
10 |
05:00 |
68.1 |
69.29 |
69.10 |
|
|
mean of determinations 5 to 10 |
69.06 |
|
|
|
SD |
0.090 |
|
Description of key information
The Surface Tension assay performed according to OECD guideline nº 115 (ring method) shows that the mean surface tension of the degradation products of the test substance is 69.061 mN/m at a temperature of 20.0 °C.
Key value for chemical safety assessment
- Surface tension:
- 69.061
- in mN/m at 20°C and concentration in mg/L:
- 900
Additional information
The Surface Tension assay performed according to OECD guideline nº 115 (ring method) shows that the mean surface tension of the degradation products of the test substance is 69.061 mN/m at a temperature of 20.0 °C.
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