Registration Dossier
Registration Dossier
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EC number: 700-924-0 | CAS number: -
Dissociation constant
Administrative data
- Endpoint:
- dissociation constant
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012
- 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:
- OECD Guideline 112 (Dissociation Constants in Water)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- disodium 4-hydroxy-3-[(E)-2-[4-({4-[(E)-2-(1-hydroxy-4-sulfonaphthalen-2-yl)diazen-1-yl]-3-methoxyphenyl}(phenyl)methyl)-2-methoxyphenyl]diazen-1-yl]naphthalene-1-sulfonate
- EC Number:
- 700-924-0
- Molecular formula:
- C41H30N4Na2O10S2
- IUPAC Name:
- disodium 4-hydroxy-3-[(E)-2-[4-({4-[(E)-2-(1-hydroxy-4-sulfonaphthalen-2-yl)diazen-1-yl]-3-methoxyphenyl}(phenyl)methyl)-2-methoxyphenyl]diazen-1-yl]naphthalene-1-sulfonate
Constituent 1
Results and discussion
- Dissociating properties:
- yes
Dissociation constantopen allclose all
- No.:
- #1
- pKa:
- 1.75
- Temp.:
- 20 °C
- No.:
- #2
- pKa:
- 12.05
- Temp.:
- 20 °C
Applicant's summary and conclusion
- Conclusions:
- pKa = 1.75 and pKa = 12.05 (at 20 °C)
- Executive summary:
By means of the titration method two dissociation constants of the test item could be determined at 20 °C: pKa = 1.75 and pKa = 12.05.
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