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EC number: 212-766-5
CAS number: 867-64-1
No key study is available on the acute toxicity of gadolinium oxalate to
fish. The endpoint is therefore covered by read across from a study
performed with the related substance gadolinium oxide. Bazzon (2000)
investigated the acute toxicity of gadolinium oxide to zebrafish (Brachydanio
rerio) according to OECD guideline 203. After 96 h, no mortality or
immobilisation was observed in the blank or the 100 mg/L limit test
concentration. The LL50 was therefore > 100 mg/L. No analytics were
performed during this study, therefore the reliability was scored
Klimisch 2 (reliable with restrictions). The LL50 obtained in this
study, when recalculated to gadolinium oxalate, taking into account the
gadolinium content of both substances, is > 159.6 mg/L.
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