Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Water solubility

Currently viewing:

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:
2009

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

Constituent 1
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.

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.