Registration Dossier
Registration Dossier
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EC number: 214-160-6 | CAS number: 1103-38-4
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
- Measured immediately: log Pow= 0.09 at 23°C
- Measured after one week: log Pow= >1.79 at 23°C
Key value for chemical safety assessment
Additional information
The partition coefficient was estimated based on the ratio of the solubilities in n-octanol and in water.
The individual solubilities were determined by the flask method based on OECD Guideline 105 and the ETAD method. The concentration was quantified by HPLC with UV/Vis absorption.
The pigment-solutions were not stable. After ca. one week an agglomeration of the pigment can be observed (especially in water). So there are two different results given for this pigment.
One measurement was made immediately after filtraton of the pigment. The clear solution was injected in the HPLC. The second measurement was made after one week. The solution shows an agglomeration of the pigment. This pigment was filtrated again and the clear solution was injected in the HPLC.
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