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Diss Factsheets
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EC number: - | CAS number: -
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Acute Toxicity: oral
Administrative data
- Endpoint:
- acute toxicity: oral
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 26 April - 27 May 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Modern guideline conform study performed in GLP certified laboratory
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Test type:
- acute toxic class method
- Limit test:
- yes
Test material
- Test material form:
- solid: particulate/powder
- Details on test material:
- Neodymium fluoride oxide, magnesium doped
Batch No.: 2016JAN-15kg
Description: white to bluish white powder
Expiration date: January 1, 2020
Storage: At room temperature
Constituent 1
impurity 1
Test animals
- Species:
- rat
- Strain:
- Wistar
- Sex:
- female
- Details on test animals or test system and environmental conditions:
- Species and strain: Crl:WI BR rats
Source: TOXI COOP ZRT. Cserkesz u. 90. 1103 Budapest, Hungary
Hygienic level at arrival: SPF
Hygienic level during the study: Good conventional
Justification of strain: The Wistar rats as a rodent is one of the standard species of acute toxicity studies
Number of animals: 3 animals/group
Sex: Female, nulliparous and non pregnant animals
Age of animals: Young adult rat, 8 weeks old in first and second step
Body weight range at starting (first step): 204 - 206 g
Body weight range at starting (second step): 199 - 209 g
Acclimatization time: 5 days in first step and 6 days in second step
Animal health: Only healthy animals were used for the study. Health status was certified by the study director.
Room: 13/1
Housing: Group caging (3 animals/cage)
Cage type: Type II polypropylene/polycarbonate.
Bedding: Laboratory bedding.
Light: 12 hours daily, from 6.00 a.m. to 6.00 p.m.
Temperature: 22 ± 3 °C
Relative humidity: 30 - 70 %
Ventilation: above 10 air exchanges/hour by central air-condition system.
The temperature and relative humidity were recorded daily during the study.
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- water
- Remarks:
- Aqua purificata Ph.Hg. VIII. Batch number: 1511-5526 Date of expiration: 26.05.2016 Produced by: Pharma Produkt Kft
- Details on oral exposure:
- A single oral administration - followed by a fourteen-day observation period - was performed by gavage. The day before treatment the animals were fasted. The food but not water was withheld overnight. Animals were weighed before the application and the food was given back 3 hours after the treatment.
- Doses:
- 2000 mg/kg bw as the starting dose in three female rats. No animal died in the first step at 2000 mg/kg bw dose level, so treatment with 2000 mg/kg bw was repeated on further three female rats.
- No. of animals per sex per dose:
- 6
- Control animals:
- no
- Details on study design:
- The acute toxic class method was carried out involving a stepwise procedure with the use of 2000 mg/kg bw as the starting dose in three female rats. No animal died in the first step at 2000 mg/kg bw dose level, so treatment with 2000 mg/kg bw was repeated on further three female rats. No animal died in the second step, too, so the test was finished, the stopping criteria of Annex 2d of OECD Guideline No. 423 (presented in Appendix VII) was met.
- Statistics:
- The method used is not intended to allow the calculation of a precise LD50 value. The test item was ranked into classes of Globally Harmonized Classification System (GHS) described in the OECD Guideline No. 423
The frequency of the clinical symptoms was summarized in tabular form. The mean of the body weight and body weight gain were calculated by Excel spreadsheet software. Necropsy findings were described and summarised in tabular form.
Results and discussion
- Preliminary study:
- Starting dose was selected on the basis of the available information about the test item.
The acute toxic class method was carried out involving a stepwise procedure with the use of 2000 mg/kg bw as the starting dose in three female rats.
Effect levels
- Sex:
- female
- Dose descriptor:
- approximate LD50
- Effect level:
- > 2 000 mg/kg bw
- Based on:
- test mat.
- Mortality:
- No death occurred at 2000 mg/kg bw single oral dose of Neodymium fluoride oxide, magnesium doped. All female rats in step 1 and step 2 survived until the end of the 14-day observation period.
- Clinical signs:
- No treatment related symptoms were observed throughout the 14-day post-treatment period in groups 1 and 2 treated with 2000 mg/kg bw dose.
- Body weight:
- The mean body weight of animals treated with 2000 mg/kg bw dose corresponded to their species and age throughout the study.
- Gross pathology:
- No pathological changes were found related to the effect of the test item during the macroscopic examination of animals treated with 2000 mg/kg bw dose.
- Other findings:
- Severe hydrometra was observed in female No.: 1593 of the group 1 and in female No.: 1597 of the group 2. Slight hydrometra was found in animal No.: 1600 of group 2. Hydrometra is physiological finding and connected to the cycle of the animal. No pathological changes were found related to the effect of the test item during the macroscopic examination of animals treated with 2000 mg/kg bw dose.
Any other information on results incl. tables
Dose |
Mortality |
LD50 |
GHS |
2000 |
0/6 |
above 2000 |
5 or unclassified |
Applicant's summary and conclusion
- Interpretation of results:
- Category 5 based on GHS criteria
- Remarks:
- Migrated information
- Conclusions:
- No lethality was noted at single oral dose of 2000 mg/kg bw.
The method used is not intended to allow the calculation of a precise LD50 value.
LD50 (mg/kg bw) is above 2000; GHS category 5 or unclassified - Executive summary:
An acute toxic class method was carried out involving a stepwise procedure with the use of 2000 mg/kg bw as the starting dose in three female rats. No animal died in the first step at 2000 mg/kg bw dose level, therefore treatment with 2000 mg/kg bw was repeated on further three female rats. No animal died in the second step, too, so the test was finished, the stopping criteria of Annex 2d of OECD Guideline No. 423 (presented in Appendix VII) was met. No clinical symptoms were observed on the day of the treatment and during the 14-day observation period, the general state and behaviour of experimental animals were normal. The body weight development was undisturbed in all animals. All organs of the animals treated with 2000 mg/kg bw dose proved to be free of treatment related gross pathological changes. The method used is not intended to allow the calculation of a precise LD50value. The LD50 of Neodymium fluoride oxide is above 2000 (mg/kg bw), GHS category 5 or unclassified
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.
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