Registration Dossier
Registration Dossier
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EC number: 285-998-8 | CAS number: 85186-15-8
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:
- August 28, 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- GLP compliance:
- no
- Type of method:
- flask method
- Water solubility:
- ca. 22.96 g/L
- Temp.:
- 20 °C
- pH:
- ca. 7.66
- Conclusions:
- The water solubility of the test substance is 22.96 g/l at 20 °C and pH 7.66
very soluble (> 10000 mg/L) - Executive summary:
The substance was tested for water solubility according to OECD guideline 105: Water solubility. The water solubility of the test substance is 22.96 g/l at 20 °C and pH 7.66
Reference
Preliminary solubility result:
Reference samples and extract were first measured in the range 190 / 800 nm, so as to choose the right wavelength for quantitative measurements. Since the absorbance of the test solution was proportional to the concentration in the UV and visible spectra (fig. 1), the preliminary test result was considered for the final result calculations. The wavelength chosen was λ= 511.50 nm.
Test results:
Reference solutions were measured in the spectrophotometer in quantitative mode, thus generating a calibration curve (fig 2). The calibration curve was smooth and linear at every concentration. Considering that the preliminary test resulted in an absorbance of the same shape like the references, its value was considered for the 24 hours’ measurement (test 1). The following results were obtained after adjusting concentrations in proportion to the real weights:
Test 1 (24 hrs) |
22.76 |
g/l |
Test 2 (48 hrs) |
23.71 |
g/l |
Test 3 (96 hrs) |
22.41 |
g/l |
Average solubility |
22.96 |
g/l |
Standard deviation |
0.67 |
|
pH mother solution |
6.88 |
|
pH saturated solution |
7.66 |
|
Description of key information
Water solubility = 22.96 g/l
Key value for chemical safety assessment
- Water solubility:
- 22.96 g/L
- at the temperature of:
- 20 °C
Additional information
The water solubility of the test substance is 22.96 g/l at 20 °C and pH 7.66, as determined by the flask method
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