Registration Dossier
Registration Dossier
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EC number: 230-237-7 | CAS number: 6976-37-0
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:
- 2015-11-20
- 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)
- Version / remarks:
- OECD Guideline No. 115 for the testing of chemicals, 27 July 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- Regulation (EC) No 440/2008, method A.5
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- OECD harmonised ring method
- Key result
- Surface tension:
- ca. 67.2 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1.01 g/L
- Conclusions:
- The surface tension of the test item is 67.2 mN/m at a concentration of 1.01 g/L.
- Executive summary:
A study was conducted according to Regulation (EC) No 440/2008, method A.5 and OECD Guideline No. 115 for the testing of chemicals, 27 July 1995 to determine the surface tension of an aqueous solution of the test item using the ring method. The saturation concentration of the test item in water is >1 g/L. According to the guidelines the surface tension was therefore determined with a solution of 1.01 g/L. The measurements were conducted at 20 °C. The surface tension of an aqueous solution of the test item was found to be 67.2 mN/m with a standard deviation of 0.08. As this value is higher than 60 mN/m, the test item is not classified as surface active substance.
Reference
The surface tension of the substance was determined in an experimental study under GLP conditions according to OECD Test Guideline 115 using the harmonised OECD ring method.
The mean surface tension (n=5) was 67.2 mN/m with a standard deviation of 0.08 at 20 °C.
The test substance is considered as not surface active, as its surface tension is > 60 mN/m.
Φ was calculated as 1.024 (from the four water tensiometer readings (mN/m): 71.0, 71.1, 71.0, 71.1).
Surface tension at the five time points, with a mean of 67.2 mN/m and a standard deviation of 0.08.
| time point | tensiometer reading (mN/m) | experimental value EV (mN/m) | surface tension (mN/m) |
| 3:40 | 66.0 | 67.6 | 67.3 |
| 3:55 | 66.0 | 67.6 | 67.3 |
| 4:10 | 65.9 | 67.5 | 67.1 |
| 4:20 | 66.1 | 67.7 | 67.4 |
| 4:40 | 66 .0 | 67.6 | 67.3 |
Description of key information
The surface tension of the test item is 67.2 mN/m at a concentration of 1.01 g/L (reference 4.10-1).
Key value for chemical safety assessment
- Surface tension:
- 67.2
- in mN/m at 20°C and concentration in mg/L:
- 1 010
Additional information
A study was conducted according to Regulation (EC) No 440/2008, method A.5 and OECD Guideline No. 115 for the testing of chemicals, 27 July 1995 to determine the surface tension of an aqueous solution of the test item using the ring method. The saturation concentration of the test item in water is >1 g/L. According to the guidelines the surface tension was therefore determined with a solution of 1.01 g/L. The measurements were conducted at 20 °C. The surface tension of an aqueous solution of the test item was found to be 67.2 mN/m with a standard deviation of 0.08. As this value is higher than 60 mN/m, the test item is not classified as surface active substance.
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