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Adsorption / desorption

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Description of key information

Results from QSAR computations indicate that the estimated log Koc of the substance is 1.58, thus indicating that adsorption of the test substance to solid soil phase is not expected. Furthermore, the substance can be expected to have a low potential for adsorption due to its low log Kow value of 1.60 as well as the substance and its relevant degradation products decompose rapidly.

Key value for chemical safety assessment

Koc at 20 °C:
38.09

Additional information

The soil adsorption coefficient (Koc) was calculated using EPI Suite KOCWIN v2.00 program. Using the molecular connectivity index (MCI) method the Koc was calculated to be 10.88 L/kg and log Koc to be 1.0368 respectively. Using the Kow method the Koc was calculated to be 38.09 L/kg and Log Koc to be 1.5808 respectively. The calculated log Koc using the log Pow method was regarded as most reliable because this value based on a measured log Pow of the substance. The Koc of 38.09 L/kg was regarded as worst case assumption. Adsorption to solid soil phase is not expected. Since the test substance is a peroxide it is not within the applicability domain of the model. However, the value is used for the estimation of atmospheric degradation.

Furthermore, the substance can be expected to have a low potential for adsorption due to its low log Kow value of 1.60 as well as the substance and its relevant degradation products decompose rapidly.

[LogKoc: 1.5808]