Registration Dossier
Registration Dossier
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EC number: 936-276-2 | CAS number: -
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: The study was conducted by the manufacturer. No full test report available.
Cross-reference
- Reason / purpose for cross-reference:
- reference to other study
Data source
Reference
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 013
- Report date:
- 2013
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The pH-values was determined from the washed Ag-concentrate suspension. The suspension was done with deionised water. The pH was measured by using the eletrode and the pH-sheet. The washing of concentrate was done by using 1 litre and 2 litre of deionised water. The liquid to solid ratio was 5:1.
Test material
- Reference substance name:
- Concentrates of lead and zinc compounds with sulfur resulting from hydrometallurgy (hot acid leaching, super-hot acid leaching and flotation)
- IUPAC Name:
- Concentrates of lead and zinc compounds with sulfur resulting from hydrometallurgy (hot acid leaching, super-hot acid leaching and flotation)
- Reference substance name:
- λ²-lead(2+) sulfanylidenezinc sulfur sulfate
- EC Number:
- 936-276-2
- Molecular formula:
- Not applicable
- IUPAC Name:
- λ²-lead(2+) sulfanylidenezinc sulfur sulfate
- Details on test material:
- - Name of test material (as cited in study report): Ag-concentrate
Constituent 1
Constituent 2
Results and discussion
pH valueopen allclose all
- pH value:
- 4
- Temp.:
- 22 °C
- Remarks on result:
- other: Concentration not reported (liquid to solid ratio 5:1). Washed concentrate with 1 litre of deionised water.
- pH value:
- 4
- Temp.:
- 22 °C
- Remarks on result:
- other: Test conc. not reported (liquid to solid ratio 5:1). Washed with 2 litre of deionised water.
Applicant's summary and conclusion
- Conclusions:
- The pH of the concentrate is acidic after washing with five times greater amount of water in relation to the solid content. After proper washing the pH remains at pH level of 4. The pH of the eluate after the 24-h leaching study (EN-12457-2) conducted for washed substance was also acidic (pH 3.7).
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