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Physical & Chemical properties

Partition coefficient

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Description of key information

The partition coefficient of the test substance was determined with the slow-stirring method OECD 123 guideline (most suitable method for this type of compound). The log Kow is 5.20 at T=25°C. 

Key value for chemical safety assessment

Log Kow (Log Pow):
5.2
at the temperature of:
25 °C

Additional information

The partition coefficient OO-t-butyl-O-(2-ethylhexyl)monoperoxycarbonate was firstly evaluated in a study performed in accordance with OECD testing guideline 117 and GLP requirements. The partition coefficient was of 5.55 at 55°C. However it's known that the HPLC method is not accurate and overestimates results for "alkyl" substances due to reference substances which are "benzyl" substances.

Therefore it was decided to perform a new Kow determination according to OECD 123 guideline which is the most suitable methode for this type of compound. The Log Kow has been determined to be 5.20 at T=25°C.