Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
pH
Type of information:
other: report
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: secondary source: EFSA report for authorization of nano ZnO in Food Contact Material

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report date:
2015

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
2w% suspensions of nano ZnO coated and uncoated FCM were prepared in demineralized water. The pH was measured and recorded.
The suspensions were subsequently titrated with 0.5M NaOH solution and the pH and zeta-potential were recorded in function of titrated amount of NaOH solution.
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Zinc oxide
EC Number:
215-222-5
EC Name:
Zinc oxide
Cas Number:
1314-13-2
Molecular formula:
OZn
IUPAC Name:
oxozinc
Test material form:
solid: nanoform

Results and discussion

pH valueopen allclose all
pH value:
6.72
Remarks on result:
other: uncoated nano ZnO FCM
pH value:
6.75
Remarks on result:
other: Coated nano ZnO FCM

Applicant's summary and conclusion

Conclusions:
Nano ZnO uncoated FCM has pH at 6.72
Nano ZnO coated FCM has pH at 6.75