Registration Dossier
Registration Dossier
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EC number: 218-871-2 | CAS number: 2269-22-9
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: well documented internal laboratory experiment
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
- Report date:
- 2012
Materials and methods
Test guideline
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- a defined amount of test substance was dissolved in excess of distilled water in order to study temperature effects and pH over a period of time.
- GLP compliance:
- no
Test material
- Reference substance name:
- Dorox D20
- IUPAC Name:
- Dorox D20
- Test material form:
- other: colourless liquid
- Details on test material:
- Material from regular production, purity typically > 99%
Constituent 1
Results and discussion
pH value
- pH value:
- 8.84
- Temp.:
- 26 °C
- Concentration:
- 96.4 g/L
- Remarks on result:
- other: temperature reported is temperature after 3 hours
Any other information on results incl. tables
The experiment showed clearly that the substance reacts exothermic with water resulting in a dissolution having a pH of 8.84 after 24 hours. This goes in line with expectations for a hygroscopic substance (exothermie) and follows the equation Al(OR)3 + 3 H2O --> Al(OH)3 + 3 ROH (R = isobutyl). From Langmuir et al. 2004 it is known that Al(OH)3 at a pH of 8.5 itself is in an equilibrium ( Al(OH)2+ <-> Al(OH)3 <-> Al(OH)4 ) .
Applicant's summary and conclusion
- Conclusions:
- Aluminium triisobutylate reacts exothermic with water to form dissolved aluminium 3+ species and 2-butanol while a pH of 8.84 establishes over 24 hours (approx 10% solution).
- Executive summary:
Aluminium triisobutylate reacts exothermic with water to form dissolved aluminium 3+ species and 2-butanol while a pH of 8.84 establishes over 24 hours (approx 10% solution).
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