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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

In order to evaluate (eco-)toxicological properties of the substance magnesium diniobate, information on the assessment entities magnesium and niobium were considered. For a documentation and justification of that approcah, please refer to the separate document attached to section 13, namely Read Across Assessment Report for magnesium diniobate.

Conclusion on classification

Aquatic toxicity studies with magnesium diniobate are not available, thus aquatic toxicity is addressed with existing data on the dissociation products, i.e. magnesium and niobium ions.

The solubility of magnesium diniobate in environmental media is expected to be low since dissolution in water resulted in Mg concentrations < 25 microg/L and Nb concentrations < 0.2 microg/L after 34 days. Solubility in water is considered a worst-case for environmental media due to its low ionic strength and the absence of complexing ions. Thus, aquatic toxicity is unlikely to occur since magnesium diniobate is highly insoluble in water. Aquatic toxicity is also unlikely to occur since reported EC/LC50 values for short-term toxicity to algae, daphnia and microorgansims of niobium and short-term toxicity to algae, daphnia, fish and microorgansims of magnesium are at least 100-fold above the respective dissolved magnesium and niobium concentrations measured after dissolution in water for 34 days.

Therefore, magnesium diniobate does not meet classification criteria as short-term or long-term hazard to the aquatic environment under Regulation (EC) No 1272/2008 and subsequent adaptations.