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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Stearoyl chloride and Stearic acid (pH <= 7): Adsorption to solid soil phase is expected.
Stearic acid (pH > 7): Adsorption to solid soil phase is not expected.

Key value for chemical safety assessment

Additional information

Due to its calculated log Koc of 4.1 to 4.8 (Koc = 12250 to 60740; BASF SE, 2009), adsorption of stearoyl chloride to soil and sediment is expected. However, stearoyl chloride is expected to hydrolyse rapidly and to form stearic acid.

The hydrolysis product stearic acid has a calculated log Koc of 4.1 to 4.7 (uncharged molecule; BASF SE, 2009). The pH-corrected values for the charged molecule show that with a log Koc of 3.74 at pH 7 adsorption to solid soil phase is expected (BASF SE, 2010). However, the hydrolysis product is readily biodegradable.