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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Ecotoxicological Summary

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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

Conclusion on classification

Conclusion on classification

 

Classification related key information

Biodegradation:

Biodegradation cannot be assessed since niobium is inorganic

 

Bioaccumulation:

Elemental niobium is inert and cannot be metabolised, thus it cannot be accumulated in living being.

 

Aquatic acute toxicity:

ErC50 (72 h) > 100 mg/L (nominal) for Raphidocelis subcapitata (OECD 201)

 

Aquatic chronic toxicity:

NOEC (21 d)≥10 mg/L (nominal) for Daphnia magna (OECD 211, static renewal test)

 

ErC10 (72 h) 16. 1 mg/L (nominal) for Raphidocelis subcapitata (OECD 201, static; effects are attributed to mechanical effects and not to the intrinsic toxic properties of the test item)

 

A long-term test with fish (OECD 210) is ongoing (CCH-D-2114517391-56-01/F). Reasons for the delay are summarized in the statements attached in IUCLID section 6.1.2 (‘Status of Fish early life stage toxicity Tests (OECD 210) with Niobium metal powder’ (Sept. 2022) and Status of Aquatic Toxicity Tests (OECD 201, 210 and 211) with Niobium metal powder (May 2022).

 

 

Classification according to CLP

Acute toxicity data is available for one trophic level (aquatic algae) and chronic toxicity data is available for two trophic levels (freshwater algae and aquatic invertebrates). The lowest available effect value was obtained in a chronic freshwater algae study (OECD 201) with an ErC10 (72 h) value of 16.1 mg/L (nominal) for niobium (CAS 7440-03-1). Although filtered test item solutions (0.45 µm) were used in the test, non-dissolved niobium particles were observed in the test medium. The presence of these particles provides evidence that the observed effects are linked to mechanical effects and not to the intrinsic toxic properties of the test item. This is supported by transformation dissolution data of different niobium materials that indicate a low solubility in environmental media: Dissolved niobium concentrations at pH 8 after 28 d were < 0.01 and < 0.4 µg/L at a loading rate of 1 and 10 mg/L (nominal), respectively.

Therefore, the substance is not considered to cause any acute and chronic toxic effects on aquatic species up to its solubility limit.

 

This conclusion will be re-evaluated, based on the results of the ongoing long-term test with fish (OECD 210, CCH-D-2114517391-56-01/F). Reasons for the delay are summarized in the statements attached in IUCLID section 6.1.2 (‘Status of Fish early life stage toxicity Tests (OECD 210) with Niobium metal powder’ (Sept. 2022) and Status of Aquatic Toxicity Tests (OECD 201, 210 and 211) with Niobium metal powder (May 2022).