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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Yttrium oxide does not show any potential for bioaccumulation in fish, the preferred species as recommended in REACH Annex IX. 

Key value for chemical safety assessment

Additional information

Some published data are available. Being well-described, they were scored as Klimisch 2 and flagged as key and supporting studies.These enclosed studies clearly demonstrate that yttrium species and other rare earth elements are not accumulative in the tested biota of the water and the sediment phase nor in fish (Qiang, 1994, Hao et al. 1997 and Yang et al., 1999). As some of the studies deal with an yttrium compound, it is used in a read-across approach to conclude on the bioaccumulation potential of yttrium oxide.