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EC number: 701-473-2 | 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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: Guidance on information and chemical safety asessment, chapter R.7a: Endpoint specific guidance
- Version / remarks:
- July 2017
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: ISO-standard No 304-1985
- Deviations:
- no
- GLP compliance:
- not specified
- Type of method:
- other: Determination of the Critical Micelle Concentration according to Guidance R. 7a and ISO 304-1985
- Key result
- Water solubility:
- 0.002 g/L
- Conc. based on:
- test mat.
- Temp.:
- 20 °C
- pH:
- 5.67
- Remarks on result:
- other: Critical Micelle Concentration
- Conclusions:
- The Critical Micelle Concentration of the test item was determined to be 0.0023 ± 0.0001 g/L at 20 °C (pH = 5.67).
- Executive summary:
The Critical Micelle Concentration (CMC) of the test item was determined as a solubility limit according to Guidance on information requirements and chemical safety assessment, chapter R.7a, pp 77 and 107 and ISO-standard 304-1985 since the test item was established to be a surfactant. The Critical Micelle Concentration of the test item was determined to be 0.0023 ± 0.0001 g/L at 20 °C (pH = 5.67).
Reference
Table 1: Water solubility of the test item
Curve |
Straight line 1 |
Straight line 2 |
CMC (g/L) |
Average |
Standard deviation |
1 |
y = -15.47 ln(x) -55.291 |
y = -3.781 ln(x) +15.519 |
0.0024 |
0.0023 |
0.0001 |
2 |
y = -21.65 ln(x) -99.045 |
y = -1.685 ln(x) +22.151 |
0.0023 |
||
3 |
y = -19.71 ln(x) -88.213 |
y = -1.213ln(x) +23.929 |
0.0023 |
The individual results differ by 2.5%. Global result is:
CMC (water solubility) at 20 °C in water: 0.0023 ± 0.0001 g/L
The pH of a solution with a concentration of 1.081 mg/L. The test item is measured at 20 °C (pH = 5.67)
Description of key information
The Critical Micelle Concentration of the test item was determined to be 0.0023 ± 0.0001 g/L at 20 °C (pH = 5.67).
Key value for chemical safety assessment
- Water solubility:
- 0.002 g/L
- at the temperature of:
- 20 °C
Additional information
The Critical Micelle Concentration (CMC) of
the test item was determined as a solubility limit according to Guidance
on information requirements and chemical safety assessment, chapter
R.7a, pp 77 and 107 and ISO-standard 304-1985 since the test item was
established to be a surfactant. The Critical Micelle Concentration of
the test item was determined to be 0.0023 ± 0.0001 g/L at 20 °C (pH =
5.67).
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