Registration Dossier
Registration Dossier
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EC number: 255-280-9 | CAS number: 41253-21-8
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
-0.70 at 20 °C for the charged molecule
Key value for chemical safety assessment
- Log Kow (Log Pow):
- -0.7
- at the temperature of:
- 20 °C
Additional information
Partition coefficient of the charged molecule
To address the partition coefficient of the substance read-across was performed. The charged molecule after dissocistion in water of the target substance (sodium salt of the base) and the source substance (base) are identical. Thus read-across from the source substance to the target substance was regarded to be justified. The partition coefficient of the source substance was reported to be -0.58 in Hansch and Leo 1995 (HSDB 2014) and -0.70 at 20 °C in Kruglik et al. 1991 (Log Kow Database 2014A) and -0.72 in Claremont 1987 (LogKow Database 2014B). No information about the pH value were reported in the publications. It was assumed that the logPow measurements were performed without pH adjustment and thus, the results refer to the charged form of the source substance (organic anion of the substance). A logPow of -0.70 at 20 °C was regarded as most reliable because this value was from the most reliable literature source.
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