Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The information contained within this robust summary document comes from studies which are in the ownership of Arch Chemicals Inc. and which are protected in several regions globally. This information may not be used for any purpose other than in support of the Chemical safety Report submitted by Arch Chemicals Inc. under RegulationEC 1907/2006.

Complete aerobic aquatic and anaerobic aquatic metabolism studies were conducted according to US EPA FIFRA guidelines. These simulation tests measured the biotic degradation rates of dissolved zinc pyrithione in natural water/sediment systems (excluding the contribution of photolysis). The persistence of zinc pyrithione (ZnPT) in the water was extremely low under both aerobic and anaerobic conditions. Zinc pyrithione was also rapidly degraded in the anaerobic sediment layer, but was more persistent in the aerobic sediment. The implication is that zinc pyrithione exposed to the marine environment will rapidly degrade in the water before any significant exposure to the sediment can occur. Accumulation of pyrithione in the sediment would also be prevented by rapid degradation under the predominantly anaerobic conditions in natural sediments.