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Hazard for aquatic organisms

Hazard for air

Hazard for terrestrial organisms

Hazard for predators

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Conclusion on classification

Based on the results from transformation /dissolution tests, demonstrating that zinc drosses are insoluble to such extent that the concentration of zinc and other metal ions in standard aqueous media loaded with 10mg/l of zinc dross is lower than the reference value for aquatic toxicity of zinc at pH 6 and pH 8.

Zinc dross is thus not classified.

Model calculations supported by experimental field evidence show that zinc is rapidly removed from the water column at a rate of > 70% in 28 days. Values for zinc dross, taking this into account, are thus below the toxicity reference values at both pH and zinc dross is not classified for aquatic chronic toxicity.

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