Registration Dossier
Registration Dossier
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The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 244-599-9 | CAS number: 21829-50-5
Dissociation constant
Administrative data
- Endpoint:
- dissociation constant
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- disregarded due to major methodological deficiencies
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Value from a peer-reviewed handbook, acceptable for assessment.
Data source
Reference
- Reference Type:
- review article or handbook
- Title:
- Ionization Constants of Organic Acids in Aqueous Solution
- Author:
- Serjeant, E. P., and Dempsey, B.,
- Year:
- 1 979
- Bibliographic source:
- Pergamon, Oxford, UK
Materials and methods
- Principles of method if other than guideline:
- Not specified in the handbook.
- GLP compliance:
- no
Test material
- Reference substance name:
- Citric acid
- EC Number:
- 201-069-1
- EC Name:
- Citric acid
- Cas Number:
- 77-92-9
- Molecular formula:
- C6H8O7
- IUPAC Name:
- citric acid
Constituent 1
Results and discussion
- Dissociating properties:
- yes
Dissociation constantopen allclose all
- No.:
- #1
- pKa:
- 3.14
- Temp.:
- 20 °C
- No.:
- #2
- pKa:
- 4.77
- Temp.:
- 20 °C
- No.:
- #3
- pKa:
- 6.39
- Temp.:
- 20 °C
Applicant's summary and conclusion
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
