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EC number: 271-985-4 | CAS number: 68648-28-2
- 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:
- From April 24, 2017 to April 27, 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
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 July 26, 2015.
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Linseed oil, ester with pentaerythritol
- EC Number:
- 271-985-4
- EC Name:
- Linseed oil, ester with pentaerythritol
- Cas Number:
- 68648-28-2
- Molecular formula:
- UVCB
- IUPAC Name:
- 2,3-dihydroxypropyl (7E,10E,13E)-hexadeca-7,10,13-trienoate; bis(3-[(7E,10E,13E)-hexadeca-7,10,13-trienoyloxy]-2-hydroxypropyl (9E)-octadec-9-enoate); 3-hydroxy-2-(hydroxymethyl)-2-[(octadec-9-enoyloxy)methyl]propyl (9E,12E,15E)-octadeca-9,12,15-trienoate; 3-hydroxy-2-{[(9E)-octadec-9-enoyloxy]methyl}-2-{[(9E,12E)-octadeca-9,12-dienoyloxy]methyl}propyl (9E,12E,15E)-octadeca-9,12,15-trienoate
- Test material form:
- liquid
Constituent 1
Test animals / tissue source
- Species:
- human
- Strain:
- not specified
- Details on test animals or tissues and environmental conditions:
- 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. It consists of highly organized basal cells. These cells are not transformed or transfected with genes to induce an extended life span. The EpiOcularTM tissues are cul-tured in specially prepared cell culture inserts with a porous membrane through which nutrients can pass to the cells. The tissue surface is 0.6 cm2.
Test system
- Vehicle:
- unchanged (no vehicle)
- Controls:
- yes, concurrent positive control
- yes, concurrent negative control
- Amount / concentration applied:
- 50 µL unchanged
- Duration of treatment / exposure:
- 28 minutes
- Duration of post- treatment incubation (in vitro):
- 2 h
- Number of animals or in vitro replicates:
- Duplicate
- Details on study design:
- Pre-tests:
Assessment of direct reduction of MTT by the test substance: The test substance was tested for the ability of direct formazan reduction. To test for this ability, 50 µL of the liquid test substance were added to 1 mL of MTT reagent in a 6-well plate and the mixture was incubated in the dark at 37±1°C, 5.0±1% CO2 and 80–100% relative humidity for 3 h. 1 mL of MTT reagent plus 50 µL of deminerelised water was used as negative control. The MTT reagent did not change its colour; therefore, direct MTT reduction had not taken place, and no data correction was necessary.
Assessment of coloured or staining test substances: It was tested whether the test substance develops a colour without MTT addition. 50 µL of the test substance was added to 2 mL isopropanol, incubated in 6-well plates on an or-bital shaker for 2 h at room temperature. Then, two 200 µL aliquots of the resulting solu-tion and two 200 µL aliquots of neat isopropanol were transferred into a 96-well plate and measured with a plate reader at 570 nm. After subtraction of OD for isopropanol, the OD of the test substance solution was -0.002 (≤ 0.08). Therefore, the main test was performed without colourant controls.
Main test:
Preparations: On the day of the start of the experiment, the MTT concentrate was thawed. The concentrate was diluted with the MTT solvent directly before use. The assay medium was warmed in the water bath to 37±1°C. 6-well-plates were labelled with test substance, negative control and positive control and filled with 1 mL assay medium in the appropriate wells. All 24 inserts were inspected for viability and the presence of air bubbles between agarose gel and insert. Viable tissues were transferred in the prepared 6-well-plate and incubated at 37±1°C, 5±1% CO2 and 80–100% relative humidity for 1 h. After the pre-incubation, the medium was replaced and the wells were filled with 1 mL fresh assay medium. All 6-well-plates were incubated at 37±1°C, 5±1% CO2 and 80–100% relative humidity for 16 h and 30 minutes.
Exposition and post-treatment: After overnight incubation, the tissues were pre-wetted with 20 µL DPBS buffer and then incubated at 37±1°C, 5±1% CO2 and 80–100% relative humidity for 30 minutes. After that, 50 µL of the controls and the test substance were applied in duplicate in 1- minute-intervals. This was done in such a manner that the upper surface of the tissue was covered. At the beginning of each experiment (application of negative controls), a stop watch was started. After dosing the last tissue, all plates were transferred into the incubator for 28 minutes at 37±1°C, 5±1% CO2 and 80–100% relative humidity. At the end of the exposure time, the inserts were removed from the plates in 1 minute in-tervals using sterile forceps and rinsed immediately. The inserts were thoroughly rinsed with DPBS. Then, the tissues were immediately transferred to and immersed in 5 mL of pre-warmed assay medium in a pre-labelled 12-well plate for 12 minutes post soak at room temperature. After that, each insert was removed from the medium, the medium was decanted off the tissue and the insert was blotted on absorbent material and transferred into the respective well of a pre-labelled 6-well plate containing 1 mL assay medium. For post-treatment in-cubation, the tissues were incubated for 120 minutes at 37±1°C, 5±1% CO2 and 80–100 % relative humidity. After the post-treatment incubation, the MTT Assay was performed.
MTT assay and extraction: A 24-well-plate was prepared with 300 µL freshly prepared MTT-reagent in each well. The tissue inserts were blotted on absorbent material and then transferred into the MTT solu-tion. The plate was incubated for 180 minutes at 37±1°C, 5±1% CO2 and 80 – 100% relative humidity. At last, each insert was thoroughly dried and set into a pre-labelled 6-well-plate, containing 2 mL isopropanol, taking care that no isopropanol is flowing into the tissue insert. The plate was firmly sealed to avoid evaporation of the solvent and then stored in the refrigerator overnight. On the next day the plate was shaken on an orbital shaker for 2 h at room temperature, protected from light.
Measurement: After 2 h, the inserts were pierced with an injection needle, taking care that all colour was extracted. The inserts were then discarded and the content of each well was thoroughly mixed in order to achieve homogenisation. From each well, two replicates with 200 µL solution (each) were pipetted into a 96-well-plate. Eight wells with 200 µL isopropanol were also pipetted, serving as a blank. The plate was read in a plate spectrophotometer at 570 nm.
Results and discussion
In vitro
Results
- Irritation parameter:
- other: % tissue viability
- Run / experiment:
- Tissue viability is calculated as % photometric absorbance compared with the mean of the negative controls
- Value:
- ca. 105.4
- Vehicle controls validity:
- not examined
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- no indication of irritation
- Other effects / acceptance of results:
- All validity criteria were met. The criterion for optical density of the negative control was fulfilled: The OD value was 1.7 (> 0.8 and < 2.5). The positive control induced a decrease in the relative absorbance as compared to the negative control to 38.4%. Variation within the replicates was acceptable (< 20%). The related infromation on results were mentioend in table in below section 'any other information on results incl. tables'.
Any other information on results incl. tables
Absorbance values blank isopropanol (OD at 570 nm)
Replicate |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
Mean |
Absorbance |
0.038 |
0.038 |
0.037 |
0.038 |
0.038 |
0.039 |
0.038 |
0.039 |
0.038 |
Absorbance values negative control, positive control and test Item (OD at 570 nm) :
Designation |
Measurement |
Negative Control |
Positive Control |
linseed oil, ester with pentaerythritol |
Tissue 1 |
1 |
1.746 |
0.711 |
1.819 |
2 |
1.698 |
0.694 |
1.811 |
|
Tissue 2 |
1 |
1.729 |
0.677 |
1.829 |
2 |
1.707 |
0.655 |
1.783 |
Mean absorbance negative control, positive control and test Item:
Designation |
Negative Control |
Positive Control |
linseed oil, ester with pentaerythritol |
Mean – blank (Tissue 1) |
1.684 |
0.665 |
1.777 |
Mean – blank (Tissue 2) |
1.680 |
0.628 |
1.768 |
% Viability positive control and test Item :
Designation |
Positive Control |
linseed oil, ester with pentaerythritol |
% Viability (Tissue 1) |
39.5% |
105.6% |
% Viability (Tissue 2) |
37.3% |
105.1% |
% Viability Mean |
38.4% |
105.4% |
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Under the study conditions, the test substance was identified as non-irritating to eyes.
- Executive summary:
A study was conducted to determine eye irritation potential of the test substance in the reconstructed human Cornea-like Epithelium according to OECD Guideline 492, in compliance with GLP. Before conducting the main study, the substance was tested for ability of direct formazan reduction The MTT reagent did not change its colour, therefore direct MTT reduction had not taken place. Duplicate tissues of the reconstructed human Cornea-like Epithelium were treated with 50µL of test substance for 28 minutes. After treatment, the respective substance was rinsed from the tissue; then, cell viability of the tissues was evaluated by addition of MTT, which can be reduced to formazan. The formazan production was evaluated by measuring the optical density (OD) of the resulting solution. Demineralised water was used as negative control, methyl acetate was used as positive control. The controls showed the following results: After treatment with the negative control, the absorbance values were within the required acceptability criterion of mean OD >0.8 and <2.5, OD was 1.7. The positive control showed clear eye irritating effects, the relative absorbance value was reduced to 38.4% (< 50%). Variation within tissue replicates was acceptable (< 20%). After treatment with the test substance, the mean value of tissue viability was 105.4%. This value is well above the threshold for eye irritation (≤60%). Under the study conditions, the test substance was identified as non-irritating to eyes (Andres, 2017).
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