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EC number: 500-105-6 | CAS number: 39423-51-3 1 - 6.5 moles propoxylated
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2009-11-25 to 2010-07-12
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- flask method
- Partition coefficient type:
- octanol-water
- Specific details on test material used for the study:
- Component of a Polyurethane System
Polyoxypropylene triamine
(39423-51-3) 60-100% - Analytical method:
- photometric method
- Key result
- Type:
- log Pow
- Partition coefficient:
- -1.13
- Temp.:
- 20 °C
- pH:
- 12.7
- Remarks on result:
- other: non-buffered pH
- Details on results:
- Because the results are obtained by testing the individual solubilities, the aqueous phase was not buffered and therefore the estimated log Pow is the partition coefficient at a non-buffered pH.
- Conclusions:
- The log Pow of the substance is -1.13 at 20 °C and a pH of 12.7.
Reference
The test temperature is kept constant (± 1 °C) within the range of 20 to 25 °C.
Description of key information
The log Pow of the test substance was determined to be -1.13 at 20°C and a pH of 12.7 (non-buffered pH), following EU test method A.8 using the estimation method based on individual n-octanol and water solubilities (Baker, 2010).
Key value for chemical safety assessment
- Log Kow (Log Pow):
- -1.13
- at the temperature of:
- 20 °C
Additional information
The sample possesses surface active properties and this is confirmed by the surface tension result. As per EC recommendation, an estimate based on calculation or individual n-octanol and water solubilities should be provided for surface active materials. The results were obtained by testing the sample to determine the individual solubility of the sample in each phase. Individual solubilities were determined by UV spectrophotometer analysis.
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