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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:
- 19 August - 20 August 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Fully documented study run under GLP and according to international guidelines.
- 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:
- plate method
- Surface tension:
- >= 65 - <= 70 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
- Conclusions:
- According to this study, reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was classified as not surface active.
- Executive summary:
The surface tension of an aqueous solution of reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was determined according to OECD 115 resp. EU A.5 under GLP conditions.
The surface tension of an aqueous solution of the test item was determined as 65.98 ±0.08 mN/m at 19.9 °C. Two measurements were performed for verification (after 60 and 120 minutes). No significant changes and thus no significant dependence on time were observed.
As all measured values were higher than 60 mN/m, the reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was classified as not surface active.
The surface tension of the negative control (water HPLC grade) lay within the accepted range.
Reference
Findings Main study
The test item solution was held at constant temperature (20.0 ±0.1 °C). After conclusion of the first measurement series, a second measurement series was performed for verification purposes.
The following values were recorded:
Table 1 Measured Values Test Item First Series
Measurement |
Time |
Mass |
Surface Tension |
Temperature |
No |
s |
g |
mN/m |
°C |
1 |
3 |
0.2698 |
65.82 |
19.9 |
2 |
6 |
0.2710 |
66.11 |
19.9 |
3 |
9 |
0.2706 |
66.01 |
19.9 |
4 |
12 |
0.2705 |
65.99 |
19.9 |
5 |
14.9 |
0.2704 |
65.96 |
19.9 |
6 |
18 |
0.2704 |
65.96 |
19.9 |
7 |
21 |
0.2703 |
65.94 |
19.9 |
8 |
24 |
0.2702 |
65.91 |
19.9 |
9 |
26.9 |
0.2707 |
66.04 |
19.9 |
10 |
30 |
0.2706 |
66.01 |
19.9 |
Mean |
65.98 |
|
||
Standard Deviation |
0.08 |
|
Table 2 Measured Values Test Item Second Series
Measurement |
Time |
Mass |
Surface Tension |
Temperature |
No |
s |
g |
mN/m |
°C |
1 |
2.9 |
0.2875 |
70.13 |
19.9 |
2 |
5.8 |
0.2870 |
70.01 |
19.9 |
3 |
8.9 |
0.2871 |
70.04 |
19.9 |
4 |
11.8 |
0.2870 |
70.01 |
19.9 |
5 |
14.9 |
0.2873 |
70.09 |
19.9 |
6 |
17.9 |
0.2873 |
70.09 |
19.9 |
7 |
20.9 |
0.2874 |
70.11 |
19.9 |
8 |
23.8 |
0.2872 |
70.06 |
19.9 |
9 |
26.9 |
0.2873 |
70.09 |
19.9 |
10 |
29.8 |
0.2875 |
70.13 |
20.0 |
Mean |
70.08 |
|
||
Standard Deviation |
0.04 |
|
Table 3 Measured Values Test Item Third Series
Measurement |
Time |
Mass |
Surface Tension |
Temperature |
No |
s |
g |
mN/m |
°C |
1 |
2.9 |
0.2769 |
67.55 |
19.9 |
2 |
5.8 |
0.2800 |
68.31 |
19.9 |
3 |
8.9 |
0.2797 |
68.23 |
19.9 |
4 |
11.8 |
0.2797 |
68.23 |
19.9 |
5 |
14.9 |
0.2798 |
68.26 |
19.9 |
6 |
17.8 |
0.2797 |
68.23 |
19.9 |
7 |
20.9 |
0.2801 |
68.33 |
20.0 |
8 |
23.9 |
0.2798 |
68.26 |
20.0 |
9 |
26.9 |
0.2797 |
68.23 |
20.0 |
10 |
29.9 |
0.2798 |
68.26 |
20.0 |
Mean |
68.19 |
|
||
Standard Deviation |
0.23 |
|
Over 120 minutes, no significant changes in the surface tension were detected.
Description of key information
A series of 10 measurements was performed to determine the surface tension of the pure test item (density 0.7515 kg/L). Two further series of 10 measurements were performed for verification on the same sample after 60 and 120 minutes. The surface tension for the respective series of measurements were 65.98, 70.08 and 68.19 mN/m. No significant changes and thus no significant dependence on time and temperature were observed. The surface tension of the negative control lay within the accepted range. The surface tension of the test item is 65.98 mN/m. As all measured values were higher than 60 mN/m, the reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was classified as not surface active.
Key value for chemical safety assessment
- Surface tension:
- 65.98
- in mN/m at 20°C and concentration in mg/L:
- 1 000
Additional information
The surface tension of an aqueous
solution of reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and
2-methylpropan-2-ol (TBA) was determined according to OECD 115 resp. EU
A.5 guidelines under GLP. The surface tension was measured to be
65.98 ±0.08 mN/m at 19.9 °C. Two measurements were performed for
verification (after 60 and 120 minutes). No significant changes and thus
no significant dependence on time were observed.
As all measured values were higher than 60 mN/m, the reaction mass of
2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was
classified as not surface active.
The surface tension of the negative control lay within the accepted
range.
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