Registration Dossier

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

- Stability: Information on the hydrolysis of zinc bis(dibenzyldithiocarbamate) is waived as the substance is insoluble in water. No tests are available for photodegradation in air and photolysis in water.

- Biodegradation: Zinc bis(dibenzyldithiocarbamate) is not readily biodegradable under aerobic conditions (Currenta GmbH & Co., 2010). With the available information on the substance, the chemical safety assessment indicates that the risks in water, sediment and soil compartments are controlled and no further information will have to be provided. However, to conclude on the PBT properties of the substance a simulation testing on ultimate degradation in surface water is planned. The definitive study is ongoing and performed according to OECD TG 309. Besides studying the rate of biodegradation, the degradated products will be identified as well in this definitive study. The final report is expected to be available in Q3/Q4 2021. An update of the dossier containing the final study results will be submitted when all ongoing/planned studies have been finalized (expected in Q1 2022). The simulation testings of biodegradation in water: sediment and soil are waived at this stage.

- Bioaccumulation: The performance of an experimental study for bioaccumulation endpoint or not depends on the partition coefficent and the biodegradation properties of the substance. If logKow ≥ 3 or the substance is persistent in surface water, sediment or soil, then an experimental study on bioaccumulation will be carried out. At this moment, both partition coefficient and the biodegradation studies are ongoing. The study on bioaccumulation is waived at this stage until the results of the ongoing studies are available.

- Adsorption/desorption: The calculated Koc value is 2.6E+09 L/kg (QSAR). A maximum Koc value of 1.0E+06 L/kg is used in the assessment.