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EC number: 204-351-2 | CAS number: 119-79-9
Dissociation constant
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:
- 2 013
- 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
- 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
Constituent 1
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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