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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
nanomaterial Zeta potential
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2020
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
2020
Report date:
2020
Reference Type:
study report
Title:
Unnamed
Year:
2020
Report date:
2201

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
colloidal vibration current (CVI)
GLP compliance:
not specified
Type of method:
other: colloidal vibration current (CVI)

Test material

Constituent 1
Chemical structure
Reference substance name:
Silicic acid, aluminum sodium salt
EC Number:
215-684-8
EC Name:
Silicic acid, aluminum sodium salt
Cas Number:
1344-00-9
Molecular formula:
nSiO2*mAl2O3*zNa2O n = 2-4; m = 0.12-3.20; z = 0.11-4.5
IUPAC Name:
aluminium(3+) sodium bis(oxosilanebis(olate))
Test material form:
solid: nanoform, no surface treatment
Remarks:
crystalline-free
Specific details on test material used for the study:
3 NAS substances (cf. section 1.4 for details)

Data gathering

Instruments:
analyzer DT-300

Results and discussion

Zeta potential
Key result
Zeta potential:
-34.1 - 17 mV

Any other information on results incl. tables

The point of zero charge varied between pH 1.9 and pH 3.0.

Applicant's summary and conclusion

Conclusions:
The zeta potential tested with three different NAS substances ranged from -34.1 to 17.0 mV in different pH ranges. The point of zero charge varied between pH 1.9 and pH 3.0.
Executive summary:

The details of the studies are provided in their reports attached in section 1.4. For confidential reasons they are presented here only in a summarized Weight of Evidence approach.