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tert-Butylperoxy-3,5,5-trimethylhexanoat is hydrolytically unstable at pH 4, pH 7 and pH 9.

The test item was found to be readily biodegradable.

Bioaccumulation potential was estimated with an estimated log Kow of 4.4. The bioaccumulation factor (BCF) was calculated to be 375 L/kg using the EPA Epiwin (v.4.0) software.

As the test item is not stable under the conditions of a Koc test and due to its low water solubility, the log Koc value of tert-butyl-3,5,5-trimethylhexanoate was calculated using EPIWIN (v. 4.00). For tert-Butylperoxy-3,5,5-trimethylhexanoat the log Koc was estimated to be 3.290 and 2.642 for Kow method and MCI method, respectively (KOCWIN v.2.00, see Annex I). The Koc was estimated to be 1950 L/kg (Kow method) and 438 L/kg (MCI method).