Registration Dossier

Administrative data

Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
key study
Study period:
07.03.2013 - 18.03.2013
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report Date:
2013

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other:
Principles of method if other than guideline:
Measurement of capacity of a compound to dissociate into respective ions.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: Amorphous
Details on test material:
- Name of test material: 5-amino-2-(p-aminoanilino)benzenesulphonic acid
- Substance type: Organic
- Physical state: solid

Results and discussion

Dissociating properties:
yes
Dissociation constantopen allclose all
No.:
#1
pKa:
0
Temp.:
33 °C
Remarks on result:
other: 0.4114 x 10-8 = 0.000000004
No.:
#2
pKa:
0
Temp.:
33 °C
Remarks on result:
other: 0.4115 x 10-8 = 0.000000004
No.:
#3
pKa:
0
Temp.:
33 °C
Remarks on result:
other: 0.4115 x 10-8 = 0.000000004

Applicant's summary and conclusion

Conclusions:
The experimental pKa value for 5-amino-2-(p-aminoanilino)benzenesulphonic acid was found to be 0.0000000041146667 (average pKa value) at 33deg C indicating that the chemical has dissociation properties.
Executive summary:

The experimental pKa value for 5-amino-2-(p-aminoanilino)benzenesulphonic acid was found to be 0.0000000041146667 (average pKa value) at 33deg C indicating that the chemical has dissociation properties.