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Administrative data

Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24.04.2013 - 10.05.2013
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
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

Constituent 1
Chemical structure
Reference substance name:
5-aminonaphthalene-2-sulphonic acid
EC Number:
204-351-2
EC Name:
5-aminonaphthalene-2-sulphonic acid
Cas Number:
119-79-9
Molecular formula:
C10H9NO3S
IUPAC Name:
5-aminonaphthalene-2-sulfonic acid
Test material form:
other: Amorphous
Details on test material:
- Name of test material: 5-aminonaphthalene-2-sulphonic acid
- Substance type: Organic
- Physical state: solid

Results and discussion

Dissociating properties:
yes
Dissociation constantopen allclose all
No.:
#1
pKa:
0
Temp.:
39 °C
Remarks on result:
other: 0.2606 x 10-8 = 0.000000002606
No.:
#2
pKa:
0
Temp.:
39 °C
Remarks on result:
other: 0.2606 x 10-8 = 0.000000002606
No.:
#3
pKa:
0
Temp.:
39 °C
Remarks on result:
other: 0.2607 x 10-8 = 0.000000002607

Applicant's summary and conclusion

Conclusions:
The experimental pKa value for 5-aminonaphthalene-2-sulphonic acid was found to be 0.0000000026063333 (average pKa value) at 39deg C indicating that the chemical has dissociation properties.
Executive summary:

The experimental pKa value for 5-aminonaphthalene-2-sulphonic acid was found to be 0.0000000026063333 (average pKa value) at 39deg C indicating that the chemical has dissociation properties.

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