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OECD High Production Volume Chemicals Program: Ecological Risk Assessment of Copper Cyanide  

Baek, Yong-Wook (Risk Assessment Division, National Institute of Environmental Research)
Kim, Eun-Ju (Risk Assessment Division, National Institute of Environmental Research)
Yoo, Sun-Kyoung (Risk Assessment Division, National Institute of Environmental Research)
Ro, Hee-Young (Risk Assessment Division, National Institute of Environmental Research)
Kim, Hyun-Mi (Risk Assessment Division, National Institute of Environmental Research)
Eom, Ig-Chun (Risk Assessment Division, National Institute of Environmental Research)
Kim, Pil-Je (Risk Assessment Division, National Institute of Environmental Research)
Publication Information
Abstract
Copper cyanide is a chemical produced in large quantities with 2,500 tonnes being produced in 2006. It is mainly used for electroplating copper, particularly alkali-Cu plate and brass plating. The purpose of this study is to reassess the physicochemical properties and environmental fate of copper cyanide based on reliable data and and to conduct an ecotoxicity test according to the OECD test guidelines as an initial environmental risk assessment (need to state where this was done). Metal containing inorganic substances are not subject to degradation, biodegradation or hydrolysis. Aquatic toxicity tests of copper cyanide were conducted according to OECD test guideline 201, 202 and 203 for green algae, daphnia, and fish, respectively. The following acute toxicity test results were obtained for aquatic species: 0.089 mg $L^{-1}$ (Algae, 72 Hr-$EC_{50}$); 0.21 mg $L^{-1}$ (flea, 48 Hr-$LC_{50}$); 0.62 mg $L^{-1}$ (Fish, 96 Hr-$ErC_{50}$). The chemical possesses properties indicating a hazard for the aquatic environment (acute toxicity in fish, daphnia and algae below 1.0 mg $L^{-1}$). As a result of this study, copper cyanide has become a candidate for detailed risk assessment. Countries that produce this chemical in significant quantities are recommended to perform specific assessments.
Keywords
ecological risk assessment; OECD; copper cyanide;
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