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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Adsorption/desorption

In an OECD Guideline 121 study for the estimation of the adsorption coefficient (Koc) on soil and on sewage sludge using HPLC the log Koc values of C12 and C14 AAPB were determined. Based on these Koc values, C12 AAPB was used as training structure for the ACD software and Koc values were calculated (with additional use of EUSES), for C8, C10, C14, C16 and C18 AAPB resulting in 89.3 (C8 derivate), 303 (C10 derivate), 726 (C12 derivate corresponding to C12 AAPB), 4870 (C14 derivate corresponding to C12 AAPB), 16500 (C16 derivate), and 56000 (C18 derivate). According to the classification scheme of Blume & Ahlsdorf (1993), a low (C8 derivate), medium (C10 derivate), high (C12 and C14 derivates), and very high (C16 and C18 derivates) sorption onto soil organic matter is to be expected. ACD/EUSES Koc and Kow values were used for further calculations (environmental exposure and risk assessment).

 

Volatilisation

Due to the ionic structure of AAPB and a corresponding negligible vapour pressure volatilisation of AAPBs is negligible and therefore relevant concentration of the substance in the atmospheric compartment is not expected.