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EC number: 217-060-0 | CAS number: 1732-10-1
- 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
- Study period:
- 15 Sepember 2017 - 08 December 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- GLP study conducted according to OECD test Guideline No. 492 without any deviation.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
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)
- Version / remarks:
- Adopted 28 July 2015
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- French GLP Compliance Programme for chemical products (inspected on 30-31 January 2017 / signed on 27 April 2017)
Test material
- Reference substance name:
- Dimethyl azelate
- EC Number:
- 217-060-0
- EC Name:
- Dimethyl azelate
- Cas Number:
- 1732-10-1
- Molecular formula:
- C11H20O4
- IUPAC Name:
- 1,9-dimethyl nonanedioate
- Test material form:
- liquid
- Details on test material:
- Name: Dimethyl Azelate
Batch no.: 1602100006
Appearance: Oily liquid, colorless
CAS No.: 1732-10-1
EINECS-No.: 217-060-0
Molecular formula: C11H20O4
Molecular weight not stated
Purity: 86 %w/w
Production date: 04 October 2016
Expire date: 1 November 2018
Storage: Fridge (2-8°C), keep away from humidity
Constituent 1
Test animals / tissue source
- Species:
- other: Reconstructed human cornea-like epithelium tissues (EpiOcular™ tissue model)
- Strain:
- other: Not applicable
- Details on test animals or tissues and environmental conditions:
- - Justification of the test method and considerations regarding applicability: The EpiOcular™ Eye Irritation Test (EIT) was validated by the European Union Reference Laboratory for Alternatives to Animal Testing (EURL ECVAM) and Cosmetics Europe between 2008 and 2013. This test guideline is applicable to liquids and semi-solids, so is considered to be applicable to the test item.
CELL SYSTEM:
- EpiOcular™ OCL-212-ver2.0, supplied by MatTek Corporation (Bratislava, Slovakia).
- Lot No.: 27006
- Keratinocyte strain: 4F1188
- Analysis for potential biological contaminants: none detected (HIV-1, Hep. B and Hep. C virus; Bacteria, yeast and other fungi)
- Tissue viability: 1.534, within the acceptance criteria (1.1-3.0)
- Barrier function: 17.77 min, within the acceptance criteria (12.2-37.5)
- Sterility: Sterile
- Transport: Not specified
- Storage: Not specified
Test system
- Vehicle:
- unchanged (no vehicle)
- Controls:
- yes, concurrent positive control
- yes, concurrent negative control
- Amount / concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 50 µL
- Concentration (if solution): not applicable
VEHICLE: Not applicable - Duration of treatment / exposure:
- 30 minutes
- Observation period (in vivo):
- Not applicable
- Duration of post- treatment incubation (in vitro):
- - 12-minute immersion period at room temperature
- 2 hour and 12 minutes post-exposure incubation at 37°C, 5% CO2 - Number of animals or in vitro replicates:
- 2 replicates
- Details on study design:
- - Details of the test procedure used
: procedure for liquids
* Pre-treatment: after an overnight incubation, tissues were pre-wetted with 20 µL of Ca2+Mg2+Free-DPBS. Then tissues were incubated for 30 minutes at standard culture conditions.
* Treatment: 50 µL of test item, positive or negative control was applied to the entire surface of 2 living RhCE tissue replicates during 30 minutes at standard culture conditions.
* Post-exposure incubation period: after treatment, tissues were carefully washed by extensive rinsing with Ca2+Mg2+Free-DPBS. Rinsed tissues were checked for any coloration and for comparable colour with negative control treated tissues (whitish). The rinsing step was followed by a 12-minute immersion period at room temperature in 5 mL of fresh medium to remove any test item absorbed into the tissue. Then the RhCE constructs were incubated for 2 hours and 12 minutes post-exposure incubation at standard culture conditions in 1 mL of fresh medium at 37°C, 5% CO2.
- Doses of test chemical and control substances used : 50 µL
- Duration and temperature of pre-treatment (30 minutes), exposure (30 minutes), post-exposure immersion (12 minutes) and post-exposure incubation (2 hour and 12 minutes)
- Description of any modifications to the test procedure : None
- Indication of controls used for direct MTT-reducers and/or colouring test chemicals (if applicable) : Since the test item did not interact with MTT, none killed control tissue models were added to the study. The test item did not show any coloration potential in presence of water or isopropanol, thus no non-specific coloration control was added to the study.
- Number of tissue replicates used per test chemical and controls (positive control, negative control): 2
- Description of evaluation criteria used including the justification for the selection of the cut-off point for the prediction model :
If the test item-treated tissue viability is > 60% relative to the negative control treated tissue viability, the test item is labeled non-irritant.
If the test item-treated tissue viability is ≤ 60% relative to negative control treated tissue viability, the test item is identified potentially requiring classification and labelling according to UN GHS (Category 2 or Category 1).
According to OECD guideline 492 a single test composed of at least two tissue replicates should be sufficient for a test chemical, when the result is unequivocal. However, in cases of borderline results, such as non-concordant replicate measurements and/or mean percent tissue viability equal to 60±5%, a second test should be considered, as well as a third one in case of discordant results between the first two tests.
- Reference to historical positive and negative control results demonstrating suitable run acceptance criteria : Yes, attached to the study report.
* Historical negative control ranges 83.17 - 116.83%
* Historical positive control ranges 6.50 - 45.11%
- Complete supporting information for the specific RhCE tissue construct used : Yes, attached to the study report.
- Reference to historical data of the RhCE tissue construct : No
- Demonstration of proficiency in performing the test method before routine use by testing of the proficiency chemicals : Yes, attached to the study report.
- Positive and negative control means and acceptance ranges based on historical data : Yes
- Acceptable variability between tissue replicates for positive and negative controls: Yes
- Acceptable variability between tissue replicates for the test chemical: Yes
Results and discussion
In vitro
Results
- Irritation parameter:
- other: % Tissue viability
- Remarks:
- mean corrected percent viability
- Run / experiment:
- 1
- Value:
- 92.81
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Remarks:
- 100.00%
- Positive controls validity:
- valid
- Remarks:
- 43.31%
- Remarks on result:
- no indication of irritation
- Other effects / acceptance of results:
- OTHER EFFECTS:
- Visible damage on test system: Not specified
DEMONSTRATION OF TECHNICAL PROFICIENCY: Yes
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: Yes, OD values included between 0.848 and 1.169
- Acceptance criteria met for positive control: % viability= 43.31%
- Range of historical values if different from the ones specified in the test guideline:
- Negative control: OD values [0.645-1.563]
- Positive control: % viability [6.50-45.11]
Any other information on results incl. tables
Table 7.3.2/1: Mean OD570Values and Percentage Viabilities for the Negative Control Item, Positive Control Item and Test Item
Tissue | OD | Mean OD / disc (#) |
Mean OD / product |
Viability % |
Mean viability % |
Difference of viability % |
Conclusion | |
Negative control | 1 | 0.849 0.848 0.856 |
0.851 | 1.002 | 84.93 | 100.00 | 30.14 | |
2 | 1.169 1.135 1.157 |
1.153 | 115.07 | |||||
Positive control | 3 | 0.405 0.399 0.399 |
0.401 | 0.434 | 40.02 | 43.31 | 6.59 | UN GHS Category 2 or 1 |
4 | 0.467 0.463 0.471 |
0.467 | 46.61 | |||||
Test item | 5 | 0.970 0.902 0.914 |
0.932 | 0.930 | 93.01 | 92.81 | 0.40 | No Category |
6 | 0.929 0.928 0.925 |
0.928 | 92.61 |
Note: the optical density was measured after a 1:2 dilution of the formazan extracts in isopropanol.
#: mean of 3 values (triplicate of the same extract)
OD: optical density
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Under the experimental conditions adopted and in accordance with Regulation EC No. 1272/2008, test item, Dimethyl Azelate, does not require classification for eye irritation or serious eye damage according to CLP and UN-GHS regulations.
- Executive summary:
A study was performed to assess the eye irritation potential of the test item by means of the Human Cornea Model Test. The study was conducted according to the OECD guideline No. 492 and in compliance with GLP.
The test item, Dimethyl Azelate, was applied as supplied at the dose of 50 µL to 2 living DPBS pre-treated RhCE (EpiOcularTM tissue model) during 30 minutes at 37°C, 5% CO2, 95% humidity (standard culture conditions). The exposure period was followed by extensive rinsing with DPBS at room temperature, a 12 minutes post-exposure immersion period at room temperature and a 2 hours and 12 minutes post-exposure incubation at standard culture conditions. The tissue viability was measured by performing an MTT assay.
The mean percent tissue viability of the RhCE replicates treated with the test item Dimethyl Azelate was 92.81 %, versus 43.31% in the positive control (Methyl acetate).
Under the experimental conditions adopted and in accordance with Regulation EC No. 1272/2008, test item Dimethyl Azelate does not require classification for eye irritation or serious eye damage according to CLP and UN-GHS regulations.
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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