Registration Dossier
Registration Dossier
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EC number: 204-898-7 | CAS number: 128-60-9
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:
- 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: The test has been performed following official guidelines and completely assessed the end point.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
- GLP compliance:
- no
- Type of method:
- shake-flask method to: flask method
- Partition coefficient type:
- octanol-water
- Analytical method:
- other: UV
- Type:
- log Pow
- Temp.:
- 20 °C
- pH:
- ca. 7
- Remarks on result:
- not determinable because of methodological limitations
- Conclusions:
- not determined due to low solubilty
- Executive summary:
The partition coefficient of the tested substance was not determined due to methodological problems about water and octanol solubility.
- Endpoint:
- partition coefficient
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- supporting study
- Study period:
- 2017
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Epiweb Estimation
- Type of method:
- calculation method (fragments)
- Type:
- log Pow
- Partition coefficient:
- 9.04
- Temp.:
- 20 °C
- pH:
- < 7
- Remarks on result:
- other: Log Kow (KOWWIN v1.67 estimate)
- Conclusions:
- Estimated log Kow = 9.04
Referenceopen allclose all
Description of key information
Estimated Log kow = 9.04 at 20°C at pH < 7
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 9.04
- at the temperature of:
- 20 °C
Additional information
The determination of partition coefficient n-octanol-water was performed according to OECD 107, Shake Flask Method (REACH&Colours Kft) but due to methodological deficiences log Kow was not determined. Estimation with Epiweb indicates a log Kow of 9.04.
The same behaviour was observed on similar substance of the same dye family for which a partition coefficient log Kow > 2.01 was estimated.
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