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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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A study for the endpoint 'further biotic degradation' has not been performed for manganese bis(dihydrogen phosphate). An adaptation from the standard testing regime is justified on the following basis:
In accordance with Annex IX of Regulation (EC) No. 1907/2006 (REACH) “Further biotic degradation testing shall be proposed by the registrant if the Chemical Safety Assessment, according to Annex I, indicated the need to investigate further the degradation of the substance and its degradation products”.
The mode of degradation for manganese bis(dihydrogen phosphate) is not relevant as the substance will dissociate to the cation and anion. The cation cannot be further degraded and the phosphate anion has no potential mechanism for further hydrolysis or degradation, itself being the final common hydrolysis product of higher polyphosphates. Thus, measurement of this endpoint is not technically feasible.

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