Registration Dossier
Registration Dossier
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EC number: 424-970-3 | 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:
- 19 April 1999 - 7 May 1999
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- column elution method
- Specific details on test material used for the study:
- Storage: ambient temperature, in the dark
- Water solubility:
- 0.12 mg/L
- Conc. based on:
- test mat.
- Temp.:
- 20 °C
- pH:
- ca. 7
- Details on results:
- Preliminary test:
The sample that was centrifuged twice was analysed by HPLC, resulting in a solubility of approximately 0.40 mg/L. Based on this outcome it was decided to apply the column-elution method.
Main test:
The water solubility was calculated from the peak height in the chromatogram. In the first series a steady-state was found (difference between 5 successive fractions less than 30%). All calculated solubilities were in the range of 0.2 -0.1 mg/L.
In the second series no steady state was found. The range of the calculated water solubilities was 0.07 - 0.004 mg/L.
The test item appeared to react with water, as the solubility of the test substance appeared to be lower at a lower flow-rate in the column-elution test.
To demonstrate that the test substance reacts with water, three solutions were prepared in water from stock solution (0.05, 0.10 and 0.25 mg/L). The concentration of SDBR in the three solutions was followed for 5 days with HPLC. The results (included below) indicate that the SDBR degrades with time when dissolved in water. The product of decomposition shows a peak in the chromatogram with a retention time which is 0.3s earlier than the peak of the test substance (nb: chromatograms not included in the report). - Conclusions:
- The water solubility under steady-state conditions of SDBR was found to be 0.12 mg/L at 20ºC.
Reference
Reaction of SDBR in water as a followed for 5 days
Concentration (mg/L) | 1st day recovery (%) | 2nd day recovery (%) | 3rd day recovery (%) | 4th day recovery (%) | 5th day recovery (%) |
0.05 | 134* | 70 | 0 | 0 | 0 |
0.10 | 101 | 42 | 0 | 5** | 0 |
0.25 | 102 | 76 | 56 | 52 | 48 |
* memory effect
** decomposition product
Description of key information
The water solubility of SDBR was measured to be 0.12 mg/L.
Key value for chemical safety assessment
- Water solubility:
- 0.12 mg/L
- at the temperature of:
- 20 °C
Additional information
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.
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