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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.
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