Registration Dossier
Registration Dossier
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EC number: 257-515-0 | CAS number: 51920-12-8
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- estimated by calculation
- Adequacy of study:
- key study
- Study period:
- 2011
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable method for pigments with low solubilities.
- 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:
- photometric method
- Type:
- Pow
- Partition coefficient:
- 6.35
- Temp.:
- 25 °C
- pH:
- ca. 7
- Type:
- log Pow
- Partition coefficient:
- 0.8
- Temp.:
- 25 °C
- pH:
- ca. 7
- Conclusions:
- The calculated log Pow of the test substance is 0.80.
- Executive summary:
The partition coefficient of the test substance was estimated by calculation from the measured solubilities in water (see section 4.8) and n-octanol (see section 4.9). The calculated log Pow of the test substance is 0.80.
Reference
The octanol and the water solubility were both determined at 25 -26 °C.
It is not possible to enter a temperature range in the field above, therefore 25 °C was taken as the temperature value.
Calculation:
log Kow = logP = log (c(n-octanol)/c(water))
(c: individual solubilities; see below).
|
PR185 |
Octanol solubility [µg/L] |
21.6 |
Water solubility [µg/L] |
3.4 |
POW |
6.35 |
log POW |
0.80 |
Description of key information
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 0.8
- at the temperature of:
- 25 °C
Additional information
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