Registration Dossier
Registration Dossier
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EC number: 215-137-3 | CAS number: 1305-62-0
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:
- 2010-03-23 to 2010-04-30
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Version / remarks:
- , 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- signed 2009-11-26
- Type of method:
- flask method
- Water solubility:
- 999 mg/L
- Temp.:
- 20 °C
- pH:
- 12.4
- Remarks on result:
- other: This is the water solubility of calcium as determined in the test report. The temperature was maintained within ± 0.5 °C.
- Water solubility:
- 1 844.9 mg/L
- Temp.:
- 20 °C
- pH:
- 12.4
- Remarks on result:
- other: The water solubility of Ca(OH)2 was not stated in the study report. Therefore the value was recaluted from the water solubility value of calcium as stated in the study report.
- Details on results:
- No further relevant information was stated.
- Conclusions:
- Interpretation of results (migrated information): soluble (1000-10000 mg/L)
The water solubility of the test item has been determined to be 999 mg calcium/L of solution at 20.0 ± 0.5 °C (recalculated value for calcium dihydroxide: 1844.9 mg/l). - Executive summary:
The water solubility of calcium dihydroxide was tested by measuring the concentration calcium ions in saturated solution.
The solubility for calcium dihydroxide was recalculated from the water solubility value of calcium, which was stated in the study report.
Reference
Description of key information
Water solubility of calcium dihydroxide: soluble (study results, EU A.6 method)
Key value for chemical safety assessment
- Water solubility:
- 1 844.9 mg/L
- at the temperature of:
- 20 °C
Additional information
The water solubility of calcium dihydroxide (purity = 92.1 %) was determined in a study performed according to EU Method A.6. In this study, a value of 1844.9 mg/L was obtained, and the pH of the solution was 12.4.
The water solubility of calcium carbonate, as determined in a study performed according to OECD TG 105, is 16.6 mg/L at 20 °C.
A water solubility study was performed using a method based on EU test method A.6. Two grades of hydrated lime were used, the first containing 91.3 % calcium dihydroxide, whilst the second contained 60.0 % calcium dihydroxide and 35.9 % calcium carbonate. The water solubility for the grade with high calcium dihydroxide content was 935 mg Ca/L (equivalent to 1725 mg Ca(OH)2/L) whilst for the high calcium carbonate content grade the water solubility was 910 mg Ca/L (equivalent to 1680 Ca(OH)2/L). For both grades the pH of the solution was 12.4.
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