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Environmental fate & pathways

Bioaccumulation: terrestrial

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Description of key information

Bioaccumulation is not expected to be relevant for the test substance.

Key value for chemical safety assessment

Additional information

There are no studies available for “Reaction product of thermal process between 1000°C and 2000°C of mainly aluminium oxide and calcium oxide based raw materials with at least CaO+Al2O3 >80% , in which aluminium oxide and calcium oxide in varying amounts are combined in various proportions into a multiphase crystalline matrix”. As this substance is an UVCB substance with aluminium oxide (AL2O3) and calcium oxide (CaO) as main constituents, justification based on both main components were taken into account. 

 

Aluminium compounds:

The available evidence shows the absence of aluminium biomagnification across trophic levels both in aquatic and terrestrial food chains. The existing information suggests not only that aluminium does not biomagnify, but rather that it tends to exhibit biodilution at higher trophic levels in the food chain. More detailed information can be found in the attached document (White paper on waiving for secondary poisoning for Al & Fe compounds final report 25-01-2010. pdf).

Calcium compounds:

In soil, exposure to calcium oxide actually comes down to exposure to calcium and hydroxyl ions. There will be no intake of calcium oxide as such from soil, nor will calcium oxide prevail under its original form in the organisms. Moreover, both the intake of the essential element calcium and the internal pH of an organism are actively regulated (homeostasis). Therefore, this endpoint is considered not to be relevant for calcium oxide. However, the results of one study were considered useful as supporting information. This study (Mora et al., 1999) investigated the transfer of calcium from soil to plants after soil amendment of calcitic and/or dolomitic limestone. BSAF factors were calculated for calcium.