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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

Experimental data on the bioaccumulation potential of pentacalcium hydroxide tris(orthophosphate) are not available. The substance tricalcium bis(orthophosphate) is not expected to accumulate in organisms. The substance when dissolved in water (and so animal tissues/fluids) will dissociate to the ions "phosphate" and "calcium. Phosphate and Calcium are essential micronutrients for many organisms that are natural ionic components of blood, cell fluids, etc. The uptake and concentration of calcium and phosphate in organisms is controlled and regulated by a number of mechanisms, e.g. excess calcium and phosphate is excreted. In addition, the concentrations of both nutrients are kept on a constant level, which is regulated by hormones like calcitonin (Srivastav et al. 1997, Sasayama et al. 2002). Thus, an accumulation of the both ions in body fats is considered unlikely

Thus, bioaccumulation and secondary poisoning is not anticipated.


Srivastav et al. (1997) Vitamin D metabolites affect serum Calcium and Phosphate in freshwater Catfish, Heteropneustes fossilis. Zoological Science (14), 743-746.

Sasayama et al. (2002) Direct Raises in Blood Ca Levels by Infusing a High-Ca Solution into the Blood Stream Accelerate the Secretion of Calcitonin from the Ultimobranchial Gland in Eels. Zoological Science (19), 1039-1043.