Registration Dossier

Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
Not stated
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: TIAG standard operating procedures AANC Determination of the pH value
Version / remarks:
2017
Deviations:
no
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
-White powder

Results and discussion

pH value
Key result
pH value:
4.53
Temp.:
20 °C

Applicant's summary and conclusion

Conclusions:
Under the conditions of the study the pH of the test material was 4.53.
Executive summary:

The pH of the test material was determined in accordance with the TIAG standard operating procedures AANC Determination of the pH value TIAG standard operating procedures AANC Determination of the pH value.

Prior to measurement the pH meter was checked and calibrated with a buffer solution in the expected measurement range. The pH meter was calibrated via a three-point calibration. The slope of the electrode and the result of the control buffer were either listed in the ‘Prüfmittelkontrolblatt’ or ‘calibration report’. The electrode was rinsed with H2O dem., wiped dry and immersed for measurement into the solution. At first, 10 % solutions of the test material were prepared by stirring 10 g of sample material with 90 g of H2O dem. (Milli-Q water Type 1 water grade) for 30 minutes and then adjusting it to a temperature of 20 °C.

Under the conditions of the study the pH of the test material was 4.53.