Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 269-825-3 | CAS number: 68334-35-0
Dissociation constant
Administrative data
- Endpoint:
- dissociation constant
- Type of information:
- migrated information: read-across based on grouping of substances (category approach)
- Adequacy of study:
- key study
- Study period:
- 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP compliant, guideline study, no restrictions
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
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:
- Rosin, hydrogenated
- EC Number:
- 266-041-3
- EC Name:
- Rosin, hydrogenated
- Cas Number:
- 65997-06-0
- Molecular formula:
- C20H30O2
- IUPAC Name:
- Hydrogenated rosin
- Details on test material:
- Test Substance Name Hydrogenated Rosin
CAS No. 65997-06-0
Supplied By Eastman Chemicals
Description Light amber pellets.
Constituent 1
Results and discussion
- Dissociating properties:
- yes
Dissociation constant
- pKa:
- 6.73
- Temp.:
- 20 °C
Any other information on results incl. tables
Full test results:
| 0.00 | 13.20 |
| 4.00 | 13.07 |
| 8.00 | 12.86 |
| 12.00 | 12.57 |
| 16.00 | 12.00 |
| 18.00 | 10.68 |
| 19.00 | 9.00 |
| 19.50 | 7.55 |
| 19.60 | 7.21 |
| 19.70 | 6.73 |
| 19.80 | 6.35 |
| 19.90 | 5.73 |
| 20.00 | 4.80 |
| 21.00 | 2.42 |
| 22.00 | 2.08 |
Applicant's summary and conclusion
- Conclusions:
- The following dissociation constants in water result was obtained: pKa = 6.73± 1.0
- Executive summary:
Dissociation constant in water for Hydrogenated Rosin was measured in accordance to OECD 112 guideline and a pKa value of 6.73± 1.0 was determined.
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.
