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EC number: 219-045-4 | CAS number: 2338-05-8
- 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
Eye irritation
Administrative data
- Endpoint:
- eye irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 019
- Report date:
- 2019
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 492 (Reconstructed Human Cornea-like Epithelium (RhCE) Test Method for Identifying Chemicals Not Requiring Classification and Labelling for Eye Irritation or Serious Eye Damage)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Iron citrate
- EC Number:
- 219-045-4
- EC Name:
- Iron citrate
- Cas Number:
- 2338-05-8
- Molecular formula:
- C6H8O7.xFe
- IUPAC Name:
- iron citrate
Constituent 1
- Specific details on test material used for the study:
- Name Ferric citrate monohydrate
Batch no. 45882
Appearance red to brown solid powder
Composition Ferric Citrate
Purity 99.81%
Homogeneity homogeneous
Expiry date 18. May 2019
Storage Room temperature (20 ± 5 °C); Keep away from light
Test animals / tissue source
- Species:
- human
- Strain:
- other: The EpiOcularTM tissue consists of normal, human-derived keratinocytes which have been cultured to form a stratified squamous epithelium similar to that found in the human cornea.
Test system
- Vehicle:
- unchanged (no vehicle)
- Controls:
- yes, concurrent positive control
- yes, concurrent negative control
- Amount / concentration applied:
- Approx 50 mg of test material
- Duration of treatment / exposure:
- After overnight incubation, the tissues were pre-wetted with 20 μL DPBS buffer and the tissues were incubated at 37 ± 1 °C, 5 ± 1 % CO2 and ≥ 95% relative humidity for 29 minutes. After that, 50 μL of the controls and a defined amount of the test item were applied in duplicate in one- minute- intervals.
After dosing the last tissue, all plates were transferred into the incubator for 6 hours at 37 ± 1 °C, 5 ± 1 % CO2 and ≥ 95% relative humidity - Duration of post- treatment incubation (in vitro):
- At the end of exposure time, the inserts were removed from the plates in one-minute-intervals using sterile forceps and rinsed immediately. The inserts were thoroughly rinsed with DPBS. Then, the tissues were immediately transferred into 5 mL of assay medium in pre-labelled 12-well plate for 25 minutes post soak at room temperature.
After that, each insert was blotted on absorbent material and transferred into a pre-labelled 6-well plate, containing 1 mL assay medium. For post-treatment incubation, the tissues were incubated for 18 hours and 15 minutes at 37 ± 1 °C, 5 ± 1 % CO2 and ≥ 95% relative humidity. - Number of animals or in vitro replicates:
- Duplicates
Results and discussion
In vitro
Resultsopen allclose all
- Irritation parameter:
- other: % tissue viability
- Run / experiment:
- 1
- Value:
- 27.6
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- positive indication of irritation
- Irritation parameter:
- other: % tissue viability
- Run / experiment:
- 2
- Value:
- 24.4
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- positive indication of irritation
- Other effects / acceptance of results:
- After treatment with the test item, the mean value of relative tissue viability was reduced to 26.0 %. This value is below the threshold for eye irritation potential (≤ 60%).
All validity criteria were met. The criterion for optical density of the negative control was fulfilled: The OD value was 1.6 (> 0.8 and < 2.5).
The positive control induced a decrease in tissue viability as compared to the negative control to 39.5%. Variation within the replicates of the controls and the test item was acceptable (< 20%).
For these reasons, the result of the test is considered valid.
Any other information on results incl. tables
Mean % tissue viability for the positive control (methyl acetate, which is eye irritant Cat 2) was measured at 39.5%
Applicant's summary and conclusion
- Interpretation of results:
- study cannot be used for classification
- Remarks:
- Only indicative of eye irritation / damage
- Conclusions:
- After treatment with the test item, the mean value of relative tissue viability was 26.0 %.
This value is below the threshold for eye irritation potential (≤ 60%). Test items that induce values below the threshold are either eye irritant or inducing serious eye damage.
According to the OECD Guideline 492, the EpiOcularTM Eye Irritation Test does not allow discrimination between eye irritation/reversible effects on the eye (Category 2) and serious eye damage/irreversible effects on the eye (Category 1). For these purposes, further testing with other suitable test methods is required.
Under the conditions of the test, Ferric citrate monohydrate is considered either eye irritant or inducing serious eye damage in the EpiOcularTM Eye Irritation Test.
However, it has been assessed that ferric citrate should be classified as Eye Irrit. 2 without further testing, based on the fact that it is unlikely to be Eye Dam 1, when citric acid, as the parent acid, is only Eye Irrit 2
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