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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Constituent 1
Reference substance name:
Tris[5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7- disulphonato(2-)]dialuminium
IUPAC Name:
Tris[5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7- disulphonato(2-)]dialuminium
Constituent 2
Chemical structure
Reference substance name:
Tris[5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonato(2-)]dialuminium
EC Number:
270-648-9
EC Name:
Tris[5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonato(2-)]dialuminium
Cas Number:
68475-50-3
Molecular formula:
C48H33Al2N9O21S6
IUPAC Name:
dialuminium(3+) tris(5-amino-4-hydroxy-3-[(1E)-2-phenyldiazen-1-yl]naphthalene-2,7-disulfonate)
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 .