Registration Dossier

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The log Kd for suspended particulate matter (SPM) in freshwater is 3.39 (stdev 0.40) and the average Kd is 2455 L/kg. Where wastewater is discharged to marine water it is recommended to use the measured partition coefficient in seawater, log Kd 4.21 (i.e. Kd is 16220 L/kg). The log Kd for soil is 2.64 (stdev 0.48) and the average Kd is 436.5 L/kg.


Based on QSAR predictions of biodegradation potential the substance is not considered to be persistent.

Additional information

Information on the partitioning of palladium in the environment is taken from three published papers (Cobelo-Garcia et al. 2008, Sako et al. 2009, Turner et al. 2006) and Kd values have been calculated for suspended particulate matter in freshwater, seawater and soil.


Biodegradation is not relevant for an inorganic substance. However, as this substance has an organic component biodegradation predictions have been conducted for the organic component using EPISuite’s Biowin model (USEPA 2010).

Hydrolysis is not considered to be a relevant endpoint for this substance.