Registration Dossier
Registration Dossier
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EC number: 229-102-5 | CAS number: 6410-32-8
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Study period:
- 26 Sept 2011
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable, well-documented study report which meets basic scientific principles.
- Justification for type of information:
- See rationale and justification for the analogue read-across approach for the registration of the nanoform of Pigment Red 12 using Pigment Red 22, Pigment Red 112, and Pigment Orange 38 as source substances (chapter 13).
- Reason / purpose for cross-reference:
- read-across source
- Principles of method if other than guideline:
- Calculation of log Pow from solubility in octanol (see section 4.9) and water (see section 4.8).
- Type of method:
- other: Calculation
- Partition coefficient type:
- octanol-water
- Analytical method:
- other: chromatography and UV-vis spectrometry
- Type:
- Pow
- Partition coefficient:
- 276
- Temp.:
- 23 °C
- pH:
- ca. 7
- Type:
- log Pow
- Partition coefficient:
- 2.44
- Temp.:
- 23 °C
- pH:
- ca. 7
- Details on results:
- The octanol and the water solubility were both determined at 23 -24 °C.
It is not possible to enter a temperature range in the field above, therefore 23 °C was taken as the temperature value. - Conclusions:
- The calculated log Pow of the test substance is 2.44.
- Executive summary:
The log Pow of the test substance was calculated from the solubility in octanol (see section 4.9) and the solubility in water (see section 4.8). The calculated log Pow of the test substance is 2.44 at 23 -24°C.
Reference
Calculation:
log Pow = log (c(n-octanol)/c(water))
(c: individual solubilities; see sections 4.8 and 4.9 and below).
Octanol solubility [µg/L] |
1270 |
Water solubility [µg/L] |
4.6 |
Description of key information
The calculated log Pow of the test substance (nano form) is 2.44 at 23-24°C
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 2.44
- at the temperature of:
- 23 °C
Additional information
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.
