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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Parent compound butyryl chloride and hydrolysis product butyric acid: Significant accumulation in organisms is not to be expected.

Key value for chemical safety assessment

Additional information

A study is not required for this tonnage band. Moreover, and in accordance with Regulation (EC) 1907/2006, Annex IX, Section 9.3.1, Column 2, the study does not need to be conducted if the substance has a low potential for bioaccumulation (for instance a log Kow ≤ 3). Butyryl chloride (CAS 141-75-3) has an estimated log Kow of 0.51 (KOWWIN v1.68). The substance decomposes rapidly to form HCl and butyric acid (CAS 107-92-6). The experimental log Kow of 0.79 (Hansch, C et al., 1995) for the hydrolysis product butyric acid does not indicate a significant potential for bioaccumulation.