Registration Dossier
Registration Dossier
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EC number: 235-117-8 | CAS number: 12069-94-2
Endpoint summary
Administrative data
Description of key information
Additional information
Niobium carbide is an inorganic substance and as such not susceptible to biodegradation. As the substance is highly insoluble (6.47 µg/L at 21.5 °C after 7 days and a loading of 10 mg/L in a T/D test) a study investigating the hydrolysis as a function of pH does not need to be conducted.
Results from batch equilibrium experiments on the sorption behaviour of Niobium to humus and mineral soil samples demonstrate high sorption of Nb on mineral soil. Kd values ranged between 184,000 mL/g and 54,000 mL/g. Sorption of Nb to the humus layer was found to be significantly lower (→ maximum Kd value ca. 800 mL/g).
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