Registration Dossier
Registration Dossier
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EC number: 227-578-9 | CAS number: 5895-45-4
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
No bioaccumulation data are available on insoluble salts of praseodymium but literature data provide information on the soluble salt praseodymium nitrate. A BCF value of 750 was recorded in internal organs after 29 days, with BCF values reducing over time. For the other studied tissues, the BCF values were the followings:
Muscle: BCF = 0.33 to 1.66
Skeleton: BCF = 2.32 to 8.11
Gills: BCF = 4.64 to 19
It is thus important to note the BCF values in internal organs were higher than that reported for other tissues. This was expected considering that the alimentary tract reflects normal transit of the substance. For this reason, this observation cannot be considered as an indication of bioaccumulation.The half-life for internal organs was calculated as 8.66 days. Praseodymium nitrate is therefore eliminated from fish and does not readily bio-concentrate. By analogy to praseodymium nitrate, dipraseodymium tricarbonate is unlikely to bioaccumulate, and furthermore being poorly water soluble it is expected to be less bioavailable than the soluble salt tested.
Key value for chemical safety assessment
Additional information
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