Registration Dossier
Registration Dossier
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EC number: 215-246-6 | CAS number: 1314-87-0
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 12h
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: In spite of a lack of some information, the study is comparable to guideline study with acceptable restrictions.
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 2 009
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Different sizes of lead sulfide particles were synthetized (nanoparticles) or buyed (microparticles) and characterized, then dissolved. The dissolution rate was determined by measuring samples concentrations with ICP-AES.
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Automatically generated during migration to IUCLID 6, no data available
- IUPAC Name:
- Automatically generated during migration to IUCLID 6, no data available
- Details on test material:
- Samples of lead sulfide particles : nanocrystals, microcrystals, aggregated or not.
Constituent 1
Results and discussion
Water solubilityopen allclose all
- Water solubility:
- 4.4 other: nmol/s/m²
- Temp.:
- 25 °C
- pH:
- 3
- Remarks on result:
- other: Dissolution rate of non aggregated nanocrystals (14.4 ± 1 nm)
- Water solubility:
- 0.77 other: nmol/s/m²
- Temp.:
- 25 °C
- pH:
- 3
- Remarks on result:
- other: Dissolution rate of non aggregated microcrystals (3.1 ± 0.8 µm)
- Water solubility:
- 0.47 other: nmol/s/m²
- Temp.:
- 25 °C
- pH:
- 3
- Remarks on result:
- other: Dissolution rate of aggregated nanocrystals (240 nm)
Any other information on results incl. tables
Dissolution rate of microcrystals is 1 order of magnitude slower than the dissolution rate of dispersed nanocrystals.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
The predicted size effect indicated that the solubility would increase while particles size would decrease but the experimental conditions showed that the dissolution rate of nanocrystals is the same order as the dissolution rate of microcrystals since aggregates are formed. In the conditions of the study, lead sulfide was found slightl soluble.
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