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Diss Factsheets
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EC number: 214-202-3 | CAS number: 1113-38-8
- 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
Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 16 - 18 Dec 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)
- Version / remarks:
- adopted 28 July 2015
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.46 (In Vitro Skin Irritation: Reconstructed Human Epidermis Model Test)
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- other: ECVAM 2009, Performance Standards for In-Vitro Skin Irritation Test Methods based on Reconstructed Human Epidermis (RHE)
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- other: SkinEthic Skin Irritation Test-42bis Standard Operating Procedure (SOP) (2009): Using the Reconstructed Human Epidermis (RHE) model, INVITTOX Version 2.1
- Deviations:
- not specified
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Hessisches Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Test material
- Reference substance name:
- Diammonium oxalate hydrate
- Cas Number:
- 6009-70-7
- Molecular formula:
- C2H8N2O4.H2O
- IUPAC Name:
- Diammonium oxalate hydrate
Constituent 1
In vitro test system
- Test system:
- human skin model
- Source species:
- human
- Cell type:
- non-transformed keratinocytes
- Cell source:
- other: SkinEthic™ RHE-model RHE/S/17
- Source strain:
- not specified
- Vehicle:
- unchanged (no vehicle)
- Details on test system:
- RECONSTRUCTED HUMAN EPIDERMIS (RHE) TISSUE
- Model used: SkinEthic™ RHE-model (Episkin/Skin Ethic Laboratories, Lyon, France)
- Tissue batch number: 15-RHE-151
- Expiration Date: Dec 21, 2015
TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during treatment / exposure: 42 ± 1 min at room temperature; thereafter at 37 °C for 42 ± 1 h
REMOVAL OF TEST MATERIAL AND CONTROLS
-Volume and number of washing steps: Tissues were gently rinsed with DPBS in order to remove any residual test material. Excess DPBS was removed by gently shaking the tissue inserts and blotting the bottom of the tissues inserts with blotting paper.
MTT DYE USED TO MEASURE TISSUE VIABILITY AFTER TREATMENT / EXPOSURE
- MTT concentration: 1 mg/mL
- Incubation time: 3 h ± 5 min
- Spectrophotometer: microplate reader (ELx800, BioTek Instruments GmbH, Bad Friedrichshall, Germany)
- Wavelength: 570 nm
FUNCTIONAL MODEL CONDITIONS WITH REFERENCE TO HISTORICAL DATA
- Viability: The quality of the RHE model was assessed by undertaking a MTT cell viability test.
- Barrier function: The barrier function was assessed by determination of the exposure time required to reduce tissue viability by 50% (ET-50) upon application of 100 μL of 1% Triton X-100. The ET-50 value was determined to be 5.4 h.
- Other: Absence of significant abnormalities after histological observations (HES stained vertical paraffin)
NUMBER OF REPLICATE TISSUES: 3
CONTROL TISSUES USED IN CASE OF MTT DIRECT INTERFERENCE
The test substance did not directly reduce MTT.
PREDICTION MODEL / DECISION CRITERIA
- The test substance is considered to be irritant to skin if the viability is less than 50%
- The test substance is considered to be non-irritant to skin the viability is greater than or equal to 50%
ACCEPTABILITY CRITERA
The negative control OD values for the RHE-model have to be in the range of ≥ 0.8 and ≤ 3.0.
The negative control data meet the acceptance criteria if the mean OD value is higher or equal than a historically established boundary at 570 nm. The boundary is two standard deviations below the current historical mean (1.423). The standard deviation value is considered valid if ≤ 18% of the group mean value.
The positive control data meet the acceptance criteria if the mean viability value, expressed as % of the negative control, is lower than or equal to a historically established boundary. The boundary is three standard deviations above the current historical mean (3.42%). The standard deviation value is considered valid if ≤ 18% of the group mean value. - Control samples:
- yes, concurrent negative control
- yes, concurrent positive control
- Amount/concentration applied:
- TEST MATERIAL
- Amount(s) applied: 16 mg
NEGATIVE CONTROL
- Amount(s) applied (volume or weight): 16 µL per tissue
POSITIVE CONTROL
- Amount(s) applied (volume or weight): 16 µL per tissue
- Concentration (if solution): 5% in deionised water - Duration of treatment / exposure:
- 42 ± 1 min
- Duration of post-treatment incubation (if applicable):
- 42 ± 1 h
- Number of replicates:
- triplicates for each treatment and control group.
Results and discussion
In vitro
Results
- Irritation / corrosion parameter:
- % tissue viability
- Remarks:
- mean value of 3 tissues
- Run / experiment:
- 42 min exposure
- Value:
- 99.65
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Direct-MTT reduction: MTT was not reduced by the test substance.
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: The negative control OD values were 2.111, 2.004 and 2.105 and, thus, in the range of ≥ 0.8 and ≤ 3.0. The mean OD was 2.074 and the Standard Deviation was 2.90% and, thus, higher than the historically established boundary of 1.423.
- Acceptance criteria met for positive control: The mean viability value was 1.10% and the Standard Deviation was 2.22% and, thus, lower than the historically established boundary of 3.42%.
- Acceptance criteria met for variability between replicate measurements: The standard deviation of the three tissues treated with the test substance was 0.93% and, thus, ≤ 18%.
Applicant's summary and conclusion
- Interpretation of results:
- other: CLP/EU GHS criteria not met, no classification required according to Regulation(EC) No. 1272/2008
- Conclusions:
- Under the conditions of the conducted test, the test substance did not show irritating properties towards reconstructed human epidermis tissue. The RhE-based test methods are able to identify Cat. 2 and No Cat. chemicals and can thus serve as stand-alone skin irritation methods for non-corrosives.
CLP: not classified
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