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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Henry’s Law constant

The calculated Henry’s Law constant of H < 1 * 10-8Pa m3mol-1indicates that volatilisation from surface waters is not expected to be an important process.


Adsorption and desorption in soil and sediment

In a study on the soil sorption and desorption of zinc pyrithione in five European soils by Haberhauer (2002) (, ESPTF 7023-101) conducted according to OECD Guideline 106, very high sorption (Kd > 2100) was obtained for a clay loam. Similar sorption (Kd of 12 to 74) was determined for the other soils. Desorption is much less favoured than sorption, with desorption coefficients of one order of magnitude greater than that of sorption. The values for sodium pyrithione in this test are very similar for those of zinc pyrithione under the same conditions. The mobility of the test substance in soil is therefore low. This study did not identify or quantify degradants.

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.