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EC number: 947-751-9 | CAS number: -
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:
- From November 06, 2017 to March 05, 2018
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Remarks:
- non GLP; not determined for 90% saturated solution as required by the Guideline
- Reason / purpose for cross-reference:
- reference to same study
- 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:
- no
- Remarks:
- The study was conducted in a facility which operates in accordance with Good Laboratory Practice principles; however no claim of GLP compliance was intended nor is made for this study
- Type of method:
- ring method
- Key result
- Surface tension:
- ca. 34 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
- Conclusions:
- Under the study conditions, the surface tension at nominally 1 g/L of test substance in water was determined to be 34 ± 0.5 mN/m at 20 ± 0.5ºC; therefore it is surface-active.
- Executive summary:
A study was conducted to determine the surface tension of the test substance, using ring method, according to the OECD Guideline 115 and EU Method A.5. Under the study conditions, the surface tension at nominally 1 g/L of test substance in water was determined to be 34 ± 0.5 mN/m at 20 ± 0.5ºC. Therefore, the test substance was considered to be surface-active (Envigo, 2018).
Reference
Results
The readings and temperatures for the sample solutions are shown in the following table:
Table1: Surface tension values
Concentration (mg/L) |
Reading (mN/m) |
Temperature (°C) |
1.002 x 104 |
30.0 |
20.0 |
30.0 |
20.0 |
|
30.0 |
20.0 |
|
3.205 x 103 |
30.5 |
20.0 |
30.5 |
20.0 |
|
30.5 |
20.0 |
|
1.068 x 103 |
34.0 |
20.0 |
34.0 |
20.0 |
|
34.0 |
20.0 |
|
320.5 |
37.0 |
20.0 |
37.0 |
20.0 |
|
37.0 |
20.0 |
|
96.16 |
39.0 |
20.0 |
40.0 |
20.0 |
|
40.5 |
20.0 |
|
42.0 |
20.0 |
|
42.0 |
20.0 |
|
42.0 |
20.0 |
|
32.05 |
43.0 |
20.0 |
45.0 |
20.0 |
|
45.0 |
20.0 |
|
45.0 |
20.0 |
|
9.616 |
49.0 |
20.0 |
52.0 |
20.0 |
|
52.0 |
20.0 |
|
52.0 |
20.0 |
|
3.205 |
61.0 |
20.0 |
61.0 |
20.0 |
|
61.0 |
20.0 |
|
0.9616 |
71.0 |
20.0 |
71.0 |
20.0 |
|
71.0 |
20.0 |
|
0.3205 |
73.0 |
20.0 |
73.0 |
20.0 |
|
73.0 |
20.0 |
|
0.09616 |
73.0 |
20.0 |
73.0 |
20.0 |
|
73.0 |
20.0 |
Mean surface tension values were based on the last three readings for a particular concentration which were considered to be constant.
The concentration (mg/L), log10 [concentration (mg/L)] and mean surface tension values for the sample solutions are shown in the following table:
Table 2: The concentration (mg/L), log10 [concentration (mg/L)] and mean surface tension values
Concentration |
Log10Concentration |
Mean Surface Tension (mN/m) |
Solution pH |
1.002 x 104 |
4.001 |
30.0 |
6.56 |
3.205 x 103 |
3.506 |
30.5 |
6.47 |
1.068 x 103 |
3.029 |
34.0 |
6.13 |
320.5 |
2.506 |
37.0 |
6.08 |
96.16 |
1.983 |
42.0 |
5.84 |
32.05 |
1.506 |
45.0 |
5.67 |
9.616 |
0.983 |
52.0 |
5.51 |
3.205 |
0.506 |
61.0 |
5.51 |
0.9616 |
-0.017 |
71.0 |
5.58 |
0.3205 |
-0.493 |
73.0 |
5.86 |
0.09616 |
-1.017 |
73.0 |
5.69 |
The surface tension at 1 g/L was determined to be 34.0 ± 0.5 mN/m.
Description of key information
The surface tension of the test substance was determined using ring method, according to OECD Guideline 115 and EU Method A.5 (Envigo, 2018).
Key value for chemical safety assessment
- Surface tension:
- 34
- in mN/m at 20°C and concentration in mg/L:
- 1 000
Additional information
(surface active)
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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