Registration Dossier
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Diss Factsheets
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EC number: 215-234-0 | CAS number: 1314-37-0
- 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
Endpoint summary
Administrative data
Description of key information
Ytterbium oxide is an inorganic poorly water soluble solid compound which may give rise to very small dissolved ytterbium concentrations in water. Any dissolved ytterbium will be subject to speciation, and because of the complexation behaviour of ytterbium with environmentally relevant ligands such as phosphates, carbonates, etc. under environmentally relevant conditions, and the consequent precipitation of its complexes formed with these ligands, only very small concentrations of dissolved ytterbium can be expected to occur in the aquatic environment.
The behaviour of ytterbium oxide and its capacity to elicit hazardous effects in the environment are assessed following an elemental approach, i.e. with the focus on (dissolved) ytterbium. It is clear that in this respect, hydrolysis resulting in abiotic degradation is not a relevant parameter for this compound. Similarly, biodegradation is not considered relevant for inorganic compounds such as ytterbium oxide.
Although only limited concentrations of dissolved ytterbium are to be expected as a result of potential emissions of ytterbium oxide to the aquatic environment, the ytterbium in solution may adsorb to particulate matter in the relevant environmental compartments or may be taken up by or adsorbed to living organisms. Therefore, the endpoints bioaccumulation and adsorption have been assessed in this dossier.
For aquatic bioaccumulation, a bibliographical review based on ca. 60 publications (1964-2016), containing information on the accumulation of lanthanides (including ytterbium), yttrium and/or zirconium in aquatic organisms, was written to cover this endpoint. Based on the pool of evidence discussed in this review, the overall conclusion was drawn that lanthanides such as ytterbium are unlikely to biomagnify in predatory organisms or humans exposed via the environment.
For adsorption, based on all available information, key log Kp values of 5.32, 5.34 and 4.30 L/kg were obtained for ytterbium partitioning in suspended matter-water, sediment-water, and soil-water systems, respectively. The overall conclusion is that ytterbium strongly adsorbs to particulate matter. As a result, partitioning to sediment may be expected over time upon release to the aquatic environment.
Ytterbium oxide has no significant vapour pressure and therefore emissions to air could only occur as particulate matter. In such case, ytterbium oxide would end up in the terrestrial and/or aquatic environment through dry or wet deposition.
Additional information
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.
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