Registration Dossier
Registration Dossier
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EC number: 235-113-6 | CAS number: 12069-69-1
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Already evaluated by the Competent Authorities for Biocides and Existing Substance Regulations.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 004
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
Test material
- Reference substance name:
- Copper(II) carbonate-copper(II) hydroxide (1:1)
- EC Number:
- 235-113-6
- EC Name:
- Copper(II) carbonate-copper(II) hydroxide (1:1)
- Cas Number:
- 12069-69-1
- Molecular formula:
- CuCO3.Cu(OH)2
- IUPAC Name:
- copper(II) carbonate, basic
Constituent 1
Results and discussion
Water solubilityopen allclose all
- Water solubility:
- >= 0.002 - <= 0.005 g/L
- Temp.:
- 20 °C
- pH:
- >= 6.2 - <= 6.8
- Remarks on result:
- other: Ambient pH result: A decreasing concentration in water solubility with time was noted, possibly due to precipitation of the Cu ions as the carbonate or hydroxide salt. Samples tested at 30+/- 0.5°C and 10°C +/- 0.5°C showed no temperature dependce.
- Water solubility:
- >= 1.16 g/L
- Temp.:
- 20 °C
- pH:
- >= 5.6 - <= 5.8
- Remarks on result:
- other: Acidic pH result: Solubility of the test material was dependent on the acid availability.
- Water solubility:
- < 0 g/L
- Temp.:
- 20 °C
- pH:
- >= 8.7 - <= 8.8
- Remarks on result:
- other: Basic pH result.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
An increase of the pH of the sample solution was noted as the test material degraded to soluble copper salts. This neutralised the acid, resulting in saturation due to the insolubility of the test material at ambient pH. Further solubility could be achieved by increasing the acidic pH of the sample solution. - Executive summary:
At ambient pH solubility was shown to be: 4.68 x 10-3to 1.59 x 10-3g/l at 20 ± 0.5 °C (pH: 6.2 -6.8). An increase of the pH of the
sample solution was noted as the test material degraded to soluble copper salts. This neutralised the acid, resulting in saturation due
to the insolubility of the test material at ambient pH. Further solubility could be achieved by increasing the acidic pH of the sample solution.
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