Registration Dossier

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: Experimental lab report

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report Date:
2016

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: OECD 122
Principles of method if other than guideline:
A pH meter is essentially a voltmeter with high input impedance which measures the voltage of an electrode sensitive to the hydrogen ion concentration, relative to another electrode which exhibits a constant voltage
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
- Name of test material (as cited in study report): Tris[5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7- disulphonato(2-)]dialuminium- Substance type: Organic- Physical state: Solid

Results and discussion

pH value
pH value:
4.36
Temp.:
29 °C
Concentration:
1 vol%

Applicant's summary and conclusion

Conclusions:
The pH of 1% w/v aqueous dispersion of the test item item Tris[5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonato(2-)]dialuminium (CAS No. 68475-50-3)was 4.36 at 29 °C .
Executive summary:

The pH determination of test item itemTris[5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonato(2-)]dialuminium (CAS No. 68475-50-3 )was done following OECD guideline 122. The pH of 1% w/v aqueousdispersionwas measured with the help of pH meter and the mean pH was observed to be 4.36 at 29 °C .