Registration Dossier
Registration Dossier
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EC number: 297-907-9 | CAS number: 93763-87-2 Substance formed by processing of chiefly oxidic material with lead and zinc content in a rotating furnace. Consists primarily of Al2O3, CaO, Fe, FeO and SiO2 with other nonferrous compounds as well as carbon.
Endpoint summary
Administrative data
Description of key information
Additional information
Slags, lead-zinc smelting are highly insoluble. In standard transformation/dissolution testing, only zinc is released from the substance in a very limited way. The rate and extent of zinc release is not sufficient to trigger classification. Still, some fate and distribution characteristics of zinc are considered relevant and reported in this section.
Zinc is a natural element, natural part of the earth’s crust and present in natural background concentrations in all environmental compartments, incl. Air, water, sediment, soil, biomass.
Moreover, zinc is an essential element that is needed by all living organisms for optimal growth and development.
Because zinc and its compounds are inorganic, the endpoint degradation is not applicable.
Zinc does not bioaccumulate in water or soil.
For metals, the transport and distribution over the different environmental compartments e.g. the water (dissolved fraction, fraction bound to suspended matter), soil (fraction bound or complexed to the soil particles, fraction in the soil pore water,...) is described and quantified by the metal partition coefficients between these different fractions.
Some recent monitoring data on zinc concentrations in the environment are reported in IUCLID section 5.5.1.In evaluating measured levels of zinc in the environment, it is important to consider the natural background.
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