Registration Dossier
Registration Dossier
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EC number: 400-910-1 | CAS number: 119822-74-1
Dissociation constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- dissociation constant
- Type of information:
- other: expert judge
- Adequacy of study:
- key study
- Study period:
- 14 November 1984
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Expert Judgement by assesment of chemical structure and functional groups (sulfonic acid moiety) to estimate pKa value.
- GLP compliance:
- yes
- Dissociating properties:
- yes
- No.:
- #1
- pKa:
- ca. 2
- Temp.:
- 20 °C
- Remarks on result:
- other: The exact value was not provided.
- Conclusions:
- FAT 20306/B is almost completely dissociating.
- Executive summary:
In an expert statement, it is concluded that the sulfonic groups present in the molecule are strong acids. They are therefore almost completely disscociated; pKa-value in the order of magnitude of 2 is estimated and thus the exact determination of such a limiting value is not reliable.
Reference
The sulfonic groups present in the molecule are strong acids. They are therefore almost completely disscociated; pKa-value in the order of magnitude of 2. The exact determination of such a limiting value is not reliable.
Description of key information
The test substance is almost completely dissociating.
Key value for chemical safety assessment
- pKa at 20°C:
- 2
Additional information
In an expert statement, it is concluded that the sulfonic groups present in the molecule are strong acids. They are therefore almost completely disscociated; pKa-value in the order of magnitude of 2 is estimated and thus the exact determination of such a limiting value is not reliable.
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