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Referring to the results of the water solubility test (see IUCLID endpoint 4.8 of the technical dossier) only very low metal concentrations have been detected during and after the 7-day solubilisation phase at pH 6, resulting in the conclusion that slags, tin-smelting can be regarded as highly insoluble in water. Furthermore, slags do not contain chemical groups or constituents which could hydrolyse.
Against this background testing of hydrolysis as a function of pH does not need to be conducted under Regulation (EC) No 1907/2006 (REACH).

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