Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 285-107-2 | CAS number: 85029-82-9
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Remarks:
- Critical Micelle Concentration
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- Experimental starting date: 26 October 2016 Experimental completion date: 04 January 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- The determination was carried out by a ring method, using a procedure based on the Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.
- Deviations:
- not applicable
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Version / remarks:
- The determination was carried out by a ring method, using a procedure based on the Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.
- Deviations:
- not applicable
- GLP compliance:
- yes (incl. QA statement)
- Other quality assurance:
- other: General facilities and activities where this study was conducted were inspected on an annual basis and results are reported to the relevant responsible person and Management.
- Type of method:
- ring method
- Specific details on test material used for the study:
- Identification: Test item
Appearance/Physical state: clear amber viscous liquid
Purity: 100% product
Retest date: 24 June 2018
Storage conditions: room temperature, in the dark - Conclusions:
- The critical micelle concentration of the test item at 20.0 ± 0.5 °C was determined to be 0.154 g/L.
- Executive summary:
Critical Micelle Concentration. 0.154 g/L at 20.0 ± 0.5 °C, by determining the surface tension of a range of aqueous sample solutions of differing concentration, using a procedure based on Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Experimental starting date: 26 October 2016 Experimental completion date: 04 January 2017
- 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)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Other quality assurance:
- other: GLP
- Type of method:
- ring method
- Specific details on test material used for the study:
- Identification: Test item
Appearance/Physical state: clear amber viscous liquid
Purity: 100% product
Retest date: 24 June 2018
Storage conditions: room temperature, in the dark - Key result
- Surface tension:
- 41 mN/m
- Temp.:
- 21.5 °C
- Conc.:
- 1 g/L
- Remarks on result:
- other: The test item was considered to be surface- active.
- Conclusions:
- The surface tension of duplicate dispersions prepared at a nominal 1 g/L in water has been determined to be 41.0 mN/m at 21.5 ± 0.5 °C. The test item was considered to be surface- active.
- Executive summary:
Surface Tension. 41.0 mN/m (nominal 1 g/L dispersion) at 21.5 ± 0.5 °C using a ring method, designed to be compatible with Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered to be surface-active.
Referenceopen allclose all
The readings and temperatures for the sample solutions are shown in the following tables:
SampleConcentration(g/L) |
Reading(mN/m) |
SampleConcentration(g/L) |
Reading(mN/m) |
1.00 |
41.5 |
0.01 |
60.5 |
41.5 |
60.5 |
||
41.5 |
60.5 |
||
0.333 |
42.5 |
0.003 |
69.5 |
42.5 |
70.0 |
||
42.5 |
70.0 |
||
0.10 |
46.5 |
0.001 |
72.5 |
46.5 |
72.5 |
||
46.5 |
72.5 |
||
0.033 |
53.5 |
|
|
53.5 |
|||
53.5 |
|||
The concentration (g/L), log10[concentration (g/L)] and mean surface tension values for the sample solutions are shown in the following table:
Concentration (g/L) |
Log10Concentration (g/L) |
Mean Surface Tension (mN/m) |
Solution pH |
1.00 |
0.000 |
41.5 |
7.7 |
0.333 |
-0.478 |
42.5 |
7.0 |
0.10 |
-1.00 |
46.5 |
6.6 |
0.033 |
-1.48 |
53.5 |
6.3 |
0.01 |
-2.00 |
60.5 |
6.1 |
0.003 |
-2.48 |
69.8 |
5.9 |
0.001 |
-3.00 |
72.5 |
6.1 |
The plot of surface tension (mN/m) versus log10[concentration (g/L)] is shown as follows:.
Please see the illustrated Figure3 Surface Tension (mN/m) versus log10[Concentration(g/L)]
Line 1 (red) was generated from linear regression of 4 sample solution concentrations for which the surface tension was shown to be concentration dependent and Line 2 (green) was generated from linear regression of 2 sample solution concentrations for which the surface tension was observed to be essentially independent of concentration. The intersection of these two lines gave the critical micelle concentration and was calculated by solving the two equations:
Line 1equation(red): y = -15.5x+30.6
Line 2equation(green): y = -2.09x +41.5
The CMC was determined to be 0.154 g/L in the illustrated Figure 3.
The readings, times and temperature for the sample solutions are shown in the following tables:
Sample 1
Age of Solution (mins) Reading (mN/m) Temperature (°C)
72 41.0 21.4
82 41.0 21.4
92 41.0 21.4
102 41.0 21.4
112 41.0 21.6
Sample 2
Age of Solution (mins) Reading (mN/m) Temperature (°C)
187 41.0 21.6
197 41.0 21.6
207 41.0 21.6
217 41.0 21.8
227 41.0 21.8
Mean Sample 1 result : 41.0 mN/m pH of Sample 1 : 7.6
Mean Sample 2 result : 41.0 mN/m pH of Sample 2 : 7.6
Mean result : 41.0 mN/m
Overall temperature : 21.5 ± 0.5 ºC
Discussion
On removal from the 20 °C equilibration, the samples assessed as cloudy. After filtration, the samples were visually clear but exhibited a definitive Tyndall beam effect.
According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.
Description of key information
The surface tension of duplicate dispersions prepared at a nominal 1 g/L in water has been determined to be 41.0 mN/m at 21.5 ± 0.5 °C. The test item was considered to be surface- active.
The critical micelle concentration of the test item at 20.0 ± 0.5 °C was determined to be 0.154 g/L.
Key value for chemical safety assessment
- Surface tension:
- 41
- in mN/m at 20°C and concentration in mg/L:
- 41
Additional information
Surface Tension. 41.0 mN/m (nominal 1 g/L dispersion) at 21.5 ± 0.5 °C using a ring method, designed to be compatible with Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered to be surface-active.
Critical Micelle Concentration. 0.154 g/L at 20.0 ± 0.5 °C, by determining the surface tension of a range of aqueous sample solutions of differing concentration, using a procedure based on Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
