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Environmental Hazard Classification of Metals and Metal Compounds

A Probabilistic Assessment of Classification Power for Data Generated by the T/D Protocol

image of Environmental Hazard Classification of Metals and Metal Compounds

The objective of this project was to give guidance for understanding the performance and reliability of a classification rule, when applied to data generated by the transformation/dissolution (T/D) protocol. The classification of sparingly soluble metal compounds is based on ecotoxicity reference values and on the measured concentrations of metal ions of experiments performed according to the T/D protocol and the standard operating procedure. The assessment was conducted by Dr. Reinhard Meister, TFH Berlin - University of Applied Sciences. The Nordic project group on Classification and Labelling under the Nordic Chemicals Group has been responsible for the project and the report is written by Reinhard Meister and Jonas Falck. The project was financed by The Nordic Council of Ministers. The probabilistic assessment presented in this report, apart from being issued by the Nordic Council of Ministers, is also intended for publication by the OECD as part of an OECD Phase 2 report concerning the validation of the transformation/dissolution (T/D) protocol (Annex 10 of /1/).

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Preface

For the purpose of determining the rate and extent to which metals and sparingly soluble metal compounds can produce soluble available ionic and other metal-bearing species in aqueous media under a set of standard laboratory conditions representative of those generally occurring in the environment, a Test Guidance was designed (see A10 of /1/). The generation of Transfomation/Dissolution (T/D) data according to this Test Guidance, which is referred to as the T/D protocol, is an integrated part of the recommended strategy to assess metals and metal compounds and transformation data can generally only be considered as reliable for the purposes of classification if conducted according to this Test Guidance (see A9.7.1.3 of /1/).

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