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Partition coefficient

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Description of key information

-4.68 (Key study)  based on calculation of the average log Pow of the relevant peaks 
- 4.85 at 25 degrees Celsius (supporting study)

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
25 °C

Additional information

In a key study average log Powcalculation is based on the main mixture components TPP and C4 according to the following equation (OECD 117 section 9):

weighted average log Pow= log P area %[ (Ʃ Row(peak i) ·  area % (peak i) ) ÷ (total peak area %)]

 = (3.78*42.2+5.57*42.7)/84.9 =4.68

In a supporting study, the log Kow of Phosflex 61B was determined according to OECD Guideline 107 using the shake-flask method. The log Kow of Phosflex 61B was found to be 4.85 +/- 0.0659 at 25 degrees Celsius.