Registration Dossier
Registration Dossier
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EC number: 238-778-0 | CAS number: 14726-36-4
Endpoint summary
Administrative data
Description of key information
Zinc bis(dibenzyldithiocarbamate) is not readily biodegradable under aerobic conditions. According to column 2 of Annex X, further testing on biodegradation should be considered if the chemical safety assessment indicates the need to further investigate the degradation of the substance and its degradation products. 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 property of the substance, a simulation testing on ultimate degradation in surface water was performed. The OECD TG 309 followed study was intended to be carried out on [14C]ZBEC. But upon completion of the 62- day study, ZBEC was found to be unstable in the purification steps and had broken down to [14C]dibenzylamine before applying it to the study. Therefore, the determined DT50 ( = 24.9 days) is for [14C]dibenzylamine instead of [14C]ZBEC. Enormous efforts have been put into overcoming the challenges in purifying and analyzing ZBEC in biodegradation studies. Unfortunately, no promising solution was found. Finally, it is concluded that studying the biodegradation of ZBEC in water, sediment and soil according to OECD standard guidelines is technically infeasible. Therefore, these studies are waived in accordance with the general rules of Section 2 of Annex XI to REACH.
Additional information
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