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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Key value for chemical safety assessment

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A cut off value for log Kow (logKoc) of 3 is applied for adsorption potential of non-ionising substances (section R7a of the ECHA Guidance on information requirements).Penta-1,3-dienehas an estimated log Kow of 2.44 (EPI Suite (v.4.00) software).

The organic carbon-water partition coefficient (Koc) was calculated using KOCWIN v. 2.0. based on the first-order molecular connectivity index (MCI) and the logKow = 2.44.

Koc (estimated from MCI) = 72.17 L/kg, logKoc = 1.86

Koc (estimated from logKow) =131 L/kg; log Koc=2.12

These values indicate that adsorption onto soil and sediment is not likely to be important forpenta-1,3-diene.