W7 PM Metals in the Environment: Regulatory and Risk Concerns
Wednesday, 16 November 2005: 1:50 PM - 5:30 PM in 327-329

(SKE-1117-834224) Study of the Draft OECD Transformation/Dissolution Protocol for Metals and Sparingly Soluble Metal Compounds.

Skeaff, J¹, McGeer, J¹, Hardy, D¹, ¹ CANMET-MMSL, Ottawa, Ont., Canada

ABSTRACT- The UN Globally Harmonized System of Classification and Labelling of Chemicals (GHS) is intended to provide information to users on the identities and environmental hazards of chemicals in commerce, including metals and metal compounds with a potential extension to alloys. A Draft Transformation/Dissolution Protocol (T/DP) may be applied to metals and sparingly solid metal compounds to generate data for hazard classification with respect to the aquatic environment. The T/DP is intended to measure the rate and extent of the release of metal ions from metals and metal compounds to aqueous media under conditions representative of the environment. In this paper, we present some data from a study of Ni metal, Cu₂O and Co₃O₄ powders, and Invar alloy wire conducted to validate the T/DP, as well as an examination of the T/D characteristics of sintered Fe-Cu-C alloys. We provide worked examples to show how the T/D data could be used to classify these substances under the GHS scheme.

Key words: hazard identification, transformation/dissolution, metals, alloys