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Environmental fate & pathways

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Experimental testing of adsorption/desorption behaviour of diniobium pentaoxide is technically not feasible since the test substance concentration in aqueous phase cannot be measured with sufficient accuracy due to insolubility in water. It is used mainly in the production of superalloys. Based on its uses a direct and indirect entry into the environment is very unlikely to occur. Diniobium pentaoxide is insoluble in water. It is considered to be harmless and not to accumulate in biota. Under environmental conditions diniobium pentaoxide is present as solid (melting point 1512 °C) and thus the substance is expected not to be volatile and not to enter into the atmosphere.