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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study
Cross-reference
Reason / purpose for cross-reference:
reference to same study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: OECD Guideline 105 (Water Solubility)
Deviations:
no
Principles of method if other than guideline:
During testing for water solubility the pH of the aqueous solution was measured in triplicate.
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
Reaction mass of silicon dioxide and zirconium dioxide
EC Number:
910-388-1
Molecular formula:
not applicable (multi-constituent substance)
IUPAC Name:
Reaction mass of silicon dioxide and zirconium dioxide
Details on test material:
- Name of test material (as cited in study report): Silica-Zirkonia Filler
- Physical state: White powder
- Batch: IT-253
- Analytical purity of components: 72.4% silicon dioxide (CAS No. 7631-86-9) and 26.0% zirconium dioxide (CAS No. 1314-23-4) and a not stated percentage of disodium oxide (CAS No. 1313-59-3)
- Storage: at room temperature in the dark
- Stability: stable under storage conditions
- Expiry date: 20 Nov 2010
- not soluble in water

Results and discussion

pH value
pH value:
>= 5.2 - <= 5.4
Temp.:
20 °C
Concentration:
< 0 mg/L

Any other information on results incl. tables

Table 1: Water solubility and pH of the test substance

Stirring time [h]

Analysed concentration [10-3mg/mL]

Mean [10-3mg/mL]

pH

24

< 0.4

< 0.4

5.2

48

< 0.4

5.3

72

< 0.4

5.4

Applicant's summary and conclusion

Conclusions:
The pH of the aqueous sample after 72 hours stirring was 5.4.