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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 233-297-2 | CAS number: 10108-73-3
- 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
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
- Endpoint:
- toxicity to terrestrial plants: short-term
- Data waiving:
- other justification
- Justification for data waiving:
- other:
- Endpoint:
- toxicity to terrestrial plants: long-term
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Justification for type of information:
- As the toxicity of cerium compounds is mainly determined by the extent to which the compound gives rise to bioavailable cerium in soil, and equally water soluble cerium compounds can be expected to give rise to similar levels of bioavailable cerium under similar conditions, terrestrial toxicity data obtained with water soluble cerium compounds can be lumped for hazard assessment purposes. In the case of cerium trinitrate, a study on the toxicity of cerium trichloride to Triticum aestivum (Hu et al., 2002) was therefore included in this dossier. This study was however performed in solution and therefore its results are only considered as supporting information. The full read across justification is attached to IUCLID Section 13.
- Reason / purpose for cross-reference:
- read-across source
- Species:
- Triticum aestivum
- Duration:
- 16 d
- Dose descriptor:
- NOEC
- Effect conc.:
- 0.5 other: mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Remarks:
- Ce
- Basis for effect:
- other: primary root elongation
- Remarks on result:
- other: only used as supporting information
- Species:
- Triticum aestivum
- Duration:
- 16 d
- Dose descriptor:
- NOEC
- Effect conc.:
- < 0.5 other: mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Remarks:
- Ce
- Basis for effect:
- other: root and shoot dry weight
- Remarks on result:
- other: only used as supporting information
- Endpoint:
- toxicity to terrestrial plants: long-term
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Remarks:
- No analytics were performed, therefore the study should be considered as reliable with restrictions.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Freshly emerged wheat seedlings (Triticum aestivum) were exposed to CeCl3 in a nutrient solution and the effect of Ce on plant growth was investigated during 7 or 16 days.
- GLP compliance:
- not specified
- Analytical monitoring:
- no
- Details on sampling:
- Plant samples were harvested (after 7 or 16 days) and washed with distilled water, then cut into shoots and roots, and the root length was measured.
- Vehicle:
- no
- Details on preparation and application of test substrate:
- no soil was used - nutrient solution experiment
- Species:
- Triticum aestivum
- Plant group:
- Monocotyledonae (monocots)
- Details on test organisms:
- - Common name: wheat
- Plant family: Poaceae
- Prior seed treatment/sterilization: seeds were surface sterilised with 2% NaClO for 30 min and washed thoroughly with sterilised distilled water. - Test type:
- early seedling growth toxicity test
- Study type:
- laboratory study
- Substrate type:
- other: solution
- Limit test:
- no
- Total exposure duration:
- 16 d
- Test temperature:
- not reported
- pH:
- 5.5 +/- 0.2
- Moisture:
- Study performed in nutrient solution.
- Details on test conditions:
- TEST SYSTEM
- Testing facility: greenhouse
- Test container (type, material, size): plastic pots filled with 200 mL nutrient solution
- Amount of soil: none
- Method of seeding: pre-treated seeds placed in illuminated incubator at 25°C for germination. After two days, they began to germinate and were transplanted to nylon nets to be cultivated for 2 d.
- No. of seeds per container: not reported
- No. of plants (retained after thinning): not reported
- No. of replicates per treatment group: 3
- No. of replicates per control: 3
SOURCE AND PROPERTIES OF SUBSTRATE (if soil) - no soil used
NUTRIENT MEDIUM (if used)
- Description: modified Hoagland nutrient solution: 1 mM Ca(NO3)2, 1 mM KNO3, 1 mM KH2PO4 (replaced by 0.25 mM KCl to avoid precipitation of CePO4, KH2PO4 was applied through foliage at the end of each photoperiod), 0.5 mM MgSO4, 0.004 mM Fe-EDTA, 0.0013 mM MnSO4, 0.153 mM ZnSO4, 0.111 mM H2MnO4, 0.081 mM H3BO3, 0.064 mM CuSO4.
- Nutrient medium was changed every two days.
GROWTH CONDITIONS
- Photoperiod: 14L:10D
EFFECT PARAMETERS MEASURED (with observation intervals if applicable): root and shoot dry weight, primary root elongation (at the end of the exposure period) - Nominal and measured concentrations:
- Nominal: control + 0.5, 2.0, 10.0, 25.0 mg Ce/L
- Species:
- Triticum aestivum
- Duration:
- 16 d
- Dose descriptor:
- NOEC
- Effect conc.:
- 0.5 other: mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Basis for effect:
- other: primary root elongation
- Species:
- Triticum aestivum
- Duration:
- 16 d
- Dose descriptor:
- NOEC
- Effect conc.:
- < 0.5 other: mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Basis for effect:
- other: root and shoot dry weight
- Details on results:
- 7-d NOEC for root elongation = 0.5 mg Ce/L
7-d NOEC for root and shoot dry weight = 0.5 mg Ce/L - Conclusions:
- In this study, the effects of cerium on wheat growth (Triticum aestivum) were investigated in a nutrient solution experiment. In the 7-d experiment, a NOEC of 0.5 mg Ce/L was obtained for primary root elongation as well as root and shoot dry weight. In the 16-d experiment, a NOEC of 0.5 mg Ce/L was obtained for primary root elongation whereas the NOEC for root and shoot dry weight was < 0.5 mg Ce/L. The results of this study were considered reliable with restrictions since no analytical verification of cerium concentrations was performed during the study. However, because the test was semi-static and at relatively low pH (5.5), precipitation of cerium may have been negligible.
Referenceopen allclose all
Description of key information
No key data were identified for toxicity of cerium to terrestrial plants. However, further testing is not considered necessary since the current CSA performed using the equilibrium partitioning method does not indicate the need for refinement of the terrestrial hazard assessment.
Key value for chemical safety assessment
Additional information
A single reliable study was identified for toxicity of cerium to terrestrial plants (Hu et al., 2002). In this study, the effects of cerium (provided as cerium trichloride) on wheat growth (Triticum aestivum) were investigated in a nutrient solution experiment. In the 7-d experiment, a NOEC of 0.5 mg Ce/L was obtained for primary root elongation as well as root and shoot dry weight. In the 16-d experiment, a NOEC of 0.5 mg Ce/L was obtained for primary root elongation whereas the NOEC for root and shoot dry weight was < 0.5 mg Ce/L. The results of this study were considered reliable with restrictions since no analytical verification of cerium concentrations was performed during the study. However, because the test was semi-static and at relatively low pH (5.5), precipitation of cerium may have been negligible.
To get an idea of the levels of cerium in soil that would not cause any significant adverse effects on plants, the log Kp determined for soil in this dossier can be used for recalculation. A NOEC of 0.5 mg Ce/L then corresponds to a NOEC of 1733 mg Ce/kg soil dw.
A study performed in nutrient solution is not sufficient for covering this endpoint as not representative of the ‘real’ terrestrial environment. Nevertheless, further testing is not considered necessary since the current CSA, performed using the quilibrium partitioning method, does not indicate the need for refinement of the terrestrial hazard assessment.
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.