Registration Dossier
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EC number: 225-004-1 | CAS number: 4602-84-0
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:
- 24 July 2015
- 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:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- OECD harmonised ring method
- Key result
- Surface tension:
- 40.44 mN/m
- Temp.:
- 20 °C
- Conc.:
- 90 vol%
- Remarks on result:
- other: SD ± 0.05mN/m
- Conclusions:
- The surface tension of a 90% saturated aqueous solution at 20°C was determined to be 40.44 mN/m.
- Executive summary:
Surface tension was determined by OECD harmonised ring method according to OECD TG 115 and EU Method A.5. The surface tension of a 90% saturated aqueous solution of the test item at 20°C was determined to be 40.44 mN/m. The study was conducted according to guideline but was not GLP-compliant. This study is assigned a reliability score of 1.
Reference
Table 1. Surface tension and temperature results
| Measurement number | Time 1 (min) | Time 2 (min) | Surface tension (mN/m) | Temperature (°C) |
1 |
60.5 |
1.9 |
40.44 |
20.1 |
2 |
61.1 |
2.5 |
40.55 |
20.1 |
| 3 | 61.8 | 3.2 | 40.43 | 20.1 |
| 4 | 62.4 | 3.8 | 40.50 | 20.1 |
| 5 | 63.1 | 4.5 | 40.42 | 20.1 |
| 6 | 63.8 | 5.3 | 40.46 | 20.1 |
| 7 | 64.5 | 5.9 | 40.40 | 20.1 |
| 8 | 65.1 | 6.6 | 40.44 | 20.1 |
| 9 | 65.8 | 7.3 | 40.40 | 20.1 |
| 10 | 66.5 | 7.9 | 40.40 | 20.1 |
| Mean | - | - | 40.44 | 20.1 |
| Standard deviation | - | - | 0.05 | 0.0 |
Time 1: Time from transfer of test solution into test vessel until end of each measurement
Time 2: Time from start of measurement until end of each measurement
The temperature of the test solution was maintained at 20 ± 0.5 °C.
The surface tension of the reference item n-heptane was determined on 2015-03-12 as 20.05 ± 0.01 mN/m (20 °C) for the platinum iridium ring Rl 21, internal no. 1, and is within the acceptable range of 20.23 ± 0.22 mN/m.
Description of key information
The surface tension of a 90% saturated aqueous solution of the test item was determined to be 40.44 mN/m at 20°C. As the surface tension is < 60 mN/m, the test item is classified as a surface-active substance.
Key value for chemical safety assessment
- Surface tension:
- 40.44
Additional information
Surface tension was determined by OECD harmonised ring method according to OECD TG 115 and EU Method A.5 (2015). The study was conducted according to guideline but was not GLP-compliant. This study is assigned a reliability of 1.
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