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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The Koc value was determined to be 117 at 25 deg. C and pH7 by  Franco & Trapp model.

Key value for chemical safety assessment

Koc at 20 °C:
117

Additional information

The adsorption potential was estimated for CAS 15875 -13 -5 using the MCI and the Kow methods of the KOCWIN v2.00 module from SRC EPI Suite v4.10. These estimates are representative for uncharged molecules. The substance ionises in aqueous solutions, therefore the adsorption coefficient was calculated according to Franco & Trapp (2008, 2009, 2010) to correct for the charged molecule at pH 5, 7 and 8. The Koc values are listed below.

 

Uncharged molecule:

- MCI method: Koc = 494.6 L/kg; log Koc = 2.69

- Kow method: Koc = 4.52 L/kg; log Koc = 0.66

 

Charged molecule:

- Franco & Trapp, 2008:

pH 5: Koc = 117 L/kg; log Koc = 2.07

pH 7: Koc = 117 L/kg; log Koc = 2.07

pH 8: Koc = 116 L/kg; log Koc = 2.06

 

Based on the corrections for the charged molecule according to Franco & Trapp (2008, 2009, 2010), adsorption to the solid soil phase is not expected.

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