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Physical & Chemical properties

Water solubility

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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:
2004

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.6 (Water Solubility)
GLP compliance:
yes (incl. certificate)
Type of method:
flask method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
purity: Not reported. batch no: 03-0395 to 03-434. stability: stable at room temperature

Results and discussion

Water solubilityopen allclose all
Water solubility:
0 g/L
Temp.:
20 °C
pH:
6
Remarks on result:
other: Ambient pH result.
Water solubility:
> 0.23 g/L
Temp.:
20 °C
pH:
5.1 - 5.5
Remarks on result:
other: Acidic pH result.
Water solubility:
< 0 g/L
Temp.:
20 °C
pH:
9
Remarks on result:
other: Basic pH result.

Any other information on results incl. tables

Solubility characteristics were dependent on acid availability, therefore, increased solubility could be achieved by increasing the acidic pH of the sample solution. Samples tested at 30.0°C +/- 0.5°C and 10.0°C +/- 0.5°C showed no temperature dependent changes on solubility.

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information): insoluble (< 0.1 mg/L)
Solubility at pH 6: 0.000394 g/l
Solubility at pH 5.1 - 5.5: > 0.23 g/l
Solubility at pH 9: 0.00001 g/l
Executive summary:

The solubility of copper oxide in water at 20°C was tested at a range of pH. The following results were obtained:

pH 6: 0.000394 g/l

pH 5.1 - 5.5: > 0.23 g/l

pH 9: 0.00001 g/l

Solubility characteristics were dependent on acid availability. Therefore, increased solubility could be achieved by increasing the acidic pH of the sample solution. Samples tested at 30.0°C +/- 0.5°C and 10.0°C +/- 0.5°C showed no temperature dependent changes on solubility.