Registration Dossier
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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 231-113-5 | CAS number: 7440-03-1
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Ecotoxicological Summary
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).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.