Registration Dossier
Registration Dossier
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EC number: 944-170-2 | CAS number: -
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015-02-25 to 2015-02-26
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: EU method A.5, surface tension (2008)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline 115, surface tension (1995)
- Deviations:
- no
- Principles of method if other than guideline:
- The water solubility (Critical Micelle Concentration (CMC)) was determined via surface tension.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- other: Critical Micelle Concentration
- Water solubility:
- 4.9 g/L
- Temp.:
- 20 °C
- Remarks on result:
- other: pH not specified
- Conclusions:
- The water solubility corresponding to the critical micelle concentration of C8-10 Alkylamidopropyl betaine was determined to be 4.9 g/L at 20°C.
- Executive summary:
The water solubility of C8-10 Alkylamidopropyl betaine was addressed by determination of the critical micelle concentration (CMC). The CMC was determined by measurement of the surface tension according to OECD Guideline 115 (1995) and EU method A.5 (2008) at different concentrations of the test item.
The water solubility, expressed by the critical micelle concentration, of C8-10 Alkylamidopropyl betaine was determined to be 4.9 g/L at 20°C.
Reference
Surface Tension of the Test Itemat Different Concentrations
Concentration [g/L] |
Surface Tension [mN/m] |
Density [g/mL] |
Time1 [min] |
Time2 [min] |
0.5 |
42.32 |
1.000 |
13.8 |
81.0 |
1.0 |
37.15 |
1.002 |
3.2 |
27.7 |
2.0 |
32.26 |
1.001 |
3.5 |
32.3 |
2.5 |
31.03 |
1.001 |
2.1 |
33.2 |
3.0 |
29.51 |
1.001 |
3.6 |
23.1 |
5.0 |
26.23 |
1.001 |
0.3 |
11.0 |
7.5 |
25.27 |
1.002 |
5.0 |
7.4 |
10 |
26.38 |
1.003 |
20.8 |
6.0 |
15 |
30.85 |
1.003 |
3.1 |
6.4 |
20 |
32.86 |
1.004 |
6.5 |
6.3 |
25 |
33.85 |
1.005 |
4.9 |
6.7 |
1) Time from transferring the solution to the test vessel until start of the measurement
2) Time from start of the measurement until end of the surface tension measurement
Description of key information
CMC: 4.9 g/L at 20°C (OECD TG 115/EU method A.5; GLP; RL1)
Key value for chemical safety assessment
- Water solubility:
- 4.9 g/L
- at the temperature of:
- 20 °C
Additional information
The water solubility of C8-10 Alkylamidopropyl betaine was addressed by determination of the critical micelle concentration (CMC). The CMC was determined by measurement of the surface tension according to OECD Guideline 115 (1995) and EU method A.5 (2008) at different concentrations of the test item.
The water solubility, expressed by the critical micelle concentration, of C8-10 Alkylamidopropyl betaine was determined to be 4.9 g/L at 20°C.
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