Registration Dossier
Registration Dossier
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EC number: 203-187-9 | CAS number: 104-23-4
Dissociation constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- dissociation constant
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 23.03.2013 -09.04.2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Justification for type of information:
- Experimental test result performed using standard test guidelines
- Qualifier:
- according to guideline
- Guideline:
- other: as mentioned below
- Principles of method if other than guideline:
- Measurement of capacity of a compound to dissociate into respective ions.
- GLP compliance:
- no
- Other quality assurance:
- ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
- Specific details on test material used for the study:
- - Name of test material: 4-(4-Aminophenylazo)benzenesulphonic acid
- Molecular formula: C12H11N3O3S
- Molecular weight: 277.303 g/mol
- Smiles notation: S(c1ccc(\N=N\c2ccc(N)cc2)cc1)(O)(=O)=O
- InChl: 1S/C12H11N3O3S/c13-9-1-3-10(4-2-9)14-15-11-5-7-12(8-6-11)19(16, 17)18/h1-8H,13H2,(H,16,17,18)/b15-14+
- Substance type: organic
- Physical state: Solid - Dissociating properties:
- yes
- No.:
- #1
- pKa:
- 0
- Temp.:
- 37 °C
- Remarks on result:
- other: no other details available
- Conclusions:
- The experimental pKa value of test chemical was determined to be 0.00000251 at 37°C
- Executive summary:
The experimental pKa value of test chemical was determined to be 0.00000251 at 37°C
Reference
Description of key information
The experimental pKa value of test chemical was determined to be 0.00000251 at 37°C.
This pka value when converted at 20°C is equivalent to 0.00000135.
Key value for chemical safety assessment
- pKa at 20°C:
- 0
Additional information
The experimental pKa value of test chemical was determined to be 0.00000251 at 37°C.
This pka value when converted at 20°C is equivalent to 0.00000135.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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