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Environmental fate & pathways

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The adsorption/desorption screening study does not need to be conducted because the substance has a low octanol water partition coefficient and the adsorption potential of this substance is related to this parameter. Also, the physicochemical properties of the substance indicate that it can be expected to have a low potential for adsorption. The regression method of Güsten and Sabljic (1995) has predicted the log Koc value to be 2.60 (i.e., Koc = 394).

 

According to ECHA (2017), substances with log Koc greater than 4 are generally regarded as highly adsorptive and likely to distribute in sediment and soil. As the predicted Log Koc is less than 4, it is unlikely that OFPMA will distribute in sediment and soil.

 

Reference:

ECHA (2017).  Guidance on Information Requirements and Chemical Safety Assessment: Chapter R.11: PBT/vPvB assessment. Version 3.0, June 2017.

 

Güsten H, Sabljic A (1995). QSARS for Soil Sorption. In: EC. Overview of Structure-Activity Relationships for Environmental Endpoints: Part 1: General Outline and Procedures: Report of the EU-DG-XII Project QSAR for Prediction of Fate and Effects of Chemicals in the Environment. European Commission (EC), Belgium, Chapter III, p. 6-13, 25-27. EV5V-CT92-0211 - Part 1.

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