Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to terrestrial arthropods

Currently viewing:

Administrative data

Link to relevant study record(s)

toxicity to terrestrial arthropods: long-term
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:

Description of key information

Key value for chemical safety assessment

Additional information

No soil toxicity long-term test is available for niobium (CAS 7440-03-1).


Aquatic long-term tests with algae, aquatic invertebrates and aquatic microorganisms are available for niobium. Following effect values were determined: Following effect values were determined: Aquatic algae revealed an EC10 (72 h) of 16.1 mg/L (nominal, OECD 201) for Raphidocelis subcapitata, aquatic invertebrates showed a NOEC (21 d) of ≥ 10 mg/L (nominal, OECD 211) for Daphnia magna, and aquatic microorganisms showed a NOEC (3 h) of ≥ 1000 mg/L (nominal, OECD 209) for activated sludge microorganisms. The observed effects on algae are considered to be caused by physical effects due to the presence of particles in the test medium and not by the intrinsic toxicity of the test item. Thus, the available acute and chronic ecotoxicity data show that, niobium (CAS 7440-03-1) is not acutely and chronically toxic to freshwater organisms.

This assumption will be reevaluated, based on the results of the ongoing long-term tests 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).


Considering the available aquatic toxicity data, it is not expected that niobium (CAS 7440-03-1) shows long-term effects to soil organisms.


For assessing this assumption, a soil toxicity long-term test will be conducted. Since aquatic algae were the most sensitive organisms group upon the tested aquatic organisms, a terrestrial long-term test according to OECD Guideline 208 (Terrestrial Plant Test: Seedling Emergence and Seedling Growth Test) will be conducted. This test will be performed after a decision on the requirement to carry out the proposed test has been taken according to the procedure laid down in Regulation (EC) 1907/2006 and a deadline to submit the information required has been set by the Agency.

The choice of the terrestrial test will be reevaluated, based on the results of the ongoing long-term tests with fish (OECD 210).


As explained above it is expected that niobium (CAS 7440-03-1) does not show long-term effects to soil organisms. Moreover, this assumption will be assessed by conducting a soil toxicity long-term test according to OECD 208. Therefore, no further soil long-term toxicity testing, besides the OECD 208 test is required.