Registration Dossier
Registration Dossier
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EC number: 682-818-3 | CAS number: 95306-64-2
- 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

Endpoint summary
Administrative data
Description of key information
Skin corrosion/irritation
A study for predicting a non-specific, corrosive potential of the test item by using reconstructed human epidermis (test method epiCS®) was performed according to OECD TG 431. For the determination of time related cytotoxic effects the incubation periods were 3 min. and 60 min. The MTT (Methylthiazoletetrazolium) viability test results (3 min.: 109.87 % viability; 60 min.: 93.02 % viability) showed, that the test item has no corrosive property under the conditions of the assay used.
A study for predicting a skin irritation potential of the test item by using reconstructed human epidermis (test method epiCS®) was performed according to OECD TG 439. After an exposure period of 20 minutes, followed by a 42 hours post-treatment incubation period, the mean value of cell viability was measured to be 95.33 % in the MTT (Methylthiazoletetrazolium) conversion assay. Thus, the test item is considered to have no skin irritation category as defined in the UN GHS.
Eye damage/irritation
The test item (20 % (w/v) in isotonic saline) was tested in the BCOP test according to OECD TG 437. For determination of corneal damage opacity as well as tissue permeability was measured after a 4 hour exposure time. Based on these data, in comparison to the vehicle control, the mean In Vitro Irritancy Score (IVIS) value was calculated to be -0.3 which is below the IVIS cut-off threshold of 55 and thus identifying the test item as not inducing serious eye damage. The results of the positive (20 % imidazole solution) and negative (isotonic saline solution) controls confirmed the validity of the test system.
An in vitro study for assessing ocular irritation properties of the test item was performed using the reconstructed human cornea-like epithelium (RhCE) cell modelEpiOcularTM. The EpiOcularTMEye Irritation Test (EIT) was conducted in accordance with OECD 492. The solid test item was applied topically to the RhCE tissue surface in duplicate for 6 hours, followed by an 18 hour post-treatment incubation period. Cell viability was measured in a spectrophotometer by assessing the extent of MTT (methylthiazole tetrazolium) reduction. The optical density value obtained for the test item was used to calculate the percentage of viability relative to the negative control, which was set at 100 %. The results of the concurrent negative control (NC, deionized water) and positive control (PC, neat methyl acetate) demonstrated the viability (NC) and sensitivity (PC) of the tissue model. As the final mean percent tissue viability recorded for the test item is above 60% (120%) relative to the negative control, the test item was characterized as having no eye irritating properties.
Key value for chemical safety assessment
Skin irritation / corrosion
Link to relevant study records
- Endpoint:
- skin corrosion: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- March 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 431 (In Vitro Skin Corrosion: Human Skin Model Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Test system:
- human skin model
- Source species:
- human
- Cell type:
- non-transformed keratinocytes
- Justification for test system used:
- commercially available test method
- Vehicle:
- unchanged (no vehicle)
- Details on test system:
- RECONSTRUCTED HUMAN EPIDERMIS (RHE) TISSUE
- Model used: epiCS® (CellSystems, Troisdorf, Germany).
- Cat.-No: CS-1001
TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during treatment / exposure: RT (room temperature)
- Temperature of post-treatment incubation (if applicable): Incubator temperature: 37 ± 2° C (CO2 gas concentration: 5 %; Humidity: maximum)
MTT DYE USED TO MEASURE TISSUE VIABILITY AFTER TREATMENT / EXPOSURE
- MTT concentration: 1mg/ml
- Incubation time: 3 hours
- Spectrophotometer: EL808, Bio-Tek
- Wavelength: 570 nm
PREDICTION MODEL / DECISION CRITERIA:
- Corrosivity potential of test materials is predicted from the cell viabilities obtained after 3 min and 60 min treatment compared to the negative control. A chemical is classified "corrosive" (sub-category 1A) if the cell viability after 3 min treatment is decreased by more than 50 %. If cell viability after 3 min exposure is ≥ 50 %, while it is below 15 % after 60 min exposure the substance is also classified as corrosive, but sub-category 1 B/1 C. If cell viability after 3 min exposure is ≥ 50 % and after 60 min exposure ≥ 15 %, the substance is classified as non-corrosive.
FUNCTIONAL MODEL CONDITIONS WITH REFERENCE TO HISTORICAL DATA
Reliability of the test was previously confirmed by interlaboratory validation - Control samples:
- yes, concurrent negative control
- yes, concurrent positive control
- Amount/concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 25 mg (plus 50 µl 0.9% NaCl to moisten and ensure good contact with the epidermis surface)
NEGATIVE CONTROL
- Amount(s) applied (volume or weight): 50 µl
- Concentration (if solution): 0.9% NaCl - Duration of treatment / exposure:
- 3 and 60 minutes
- Number of replicates:
- 3
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- cell viability after 3 min [%]
- Value:
- ca. 110
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- cell viability after 60 min [%]
- Value:
- ca. 93
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Visible damage on test system: No
- Direct-MTT reduction: No - according to the results of the pre-check
- Colour interference with MTT: No - according to the results of the pre-check
DEMONSTRATION OF TECHNICAL PROFICIENCY:
- Reliability of the test was previously confirmed by interlaboratory validation
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: Yes
- Acceptance criteria met for positive control: Yes
- Acceptance criteria met for variability between replicate measurements: Yes - Interpretation of results:
- other: negative
- Executive summary:
A study for predicting a non-specific, corrosive potential of the test item by using reconstructed human epidermis (test method epiCS®) was performed according to OECD TG 431. For the determination of time related cytotoxic effects the incubation periods were 3 min. and 60 min. The MTT (Methylthiazoletetrazolium) viability test results (3 min.: 109.87 % viability; 60 min.: 93.02 % viability) showed, that the test item has no corrosive property under the conditions of the assay used.
- Endpoint:
- skin irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- April 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Test system:
- human skin model
- Source species:
- human
- Cell type:
- non-transformed keratinocytes
- Justification for test system used:
- commercially available test method
- Vehicle:
- unchanged (no vehicle)
- Details on test system:
- RECONSTRUCTED HUMAN EPIDERMIS (RHE) TISSUE
- Model used: epiCS® (CellSystems, Troisdorf, Germany)
- Cat.-No: CS-1001
TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during treatment / exposure: RT (room temperature)
- Temperature of post-treatment incubation (if applicable): Incubator temperature: 37 ± 2° C (CO2 gas concentration: 5 %; Humidity: maximum)
MTT DYE USED TO MEASURE TISSUE VIABILITY AFTER TREATMENT / EXPOSURE
- MTT concentration: 1mg/ml
- Incubation time: 3 hours
- Spectrophotometer: EL808, Bio-Tek
- Wavelength: 570 nm
NUMBER OF TESTING RUNS / EXPERIMENTS TO DERIVE FINAL PREDICTION
- The optical density of the isopropanol-extracts of 3 insert was determined by duplicate per insert = 6 OD values.
PREDICTION MODEL / DECISION CRITERIA
- The mean optical density (OD) values obtained with the test item were used to calculate the percentage of viability relative to the negative control, which is set at 100 %.
- According to UN GHS (Category 2 or Category 1) if the mean percent tissue viability after exposure and post treatment incubation is less than or equal (≤ ) to 50 %. - Control samples:
- yes, concurrent negative control
- yes, concurrent positive control
- Amount/concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 30 mg (plus 30 µl 0.9% NaCl to moisten and ensure good contact with the epidermis surface)
NEGATIVE CONTROL
- Amount(s) applied (volume or weight): 30 µl
- Concentration (if solution): 0.9% NaCl in water
POSITIVE CONTROL
- Amount(s) applied (volume or weight): 30 µl
- Concentration (if solution): 5% SDS in physiological saline - Duration of treatment / exposure:
- 20 minutes
- Duration of post-treatment incubation (if applicable):
- 42 hours
- Number of replicates:
- 3
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- cell viability after 20 min [%]
- Value:
- ca. 95
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Visible damage on test system: No
- Direct-MTT reduction: No - according to the results of the pre-check
- Colour interference with MTT: No - according to the results of the pre-check
DEMONSTRATION OF TECHNICAL PROFICIENCY:
- Reliability of the test was previously confirmed by interlaboratory validation
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: Yes
- Acceptance criteria met for positive control: Yes
- Acceptance criteria met for variability between replicate measurements: Yes - Interpretation of results:
- other: negative
- Executive summary:
A study for predicting a skin irritation potential of the test item by using reconstructed human epidermis (test method epiCS®) was performed according to OECD TG 439. After an exposure period of 20 minutes, followed by a 42 hours post-treatment incubation period, the mean value of cell viability was measured to be 95.33 % in the MTT (Methylthiazoletetrazolium) conversion assay. Thus, the test item is considered to have no skin irritation category as defined in the UN GHS.
Referenceopen allclose all
Table 1: Tabular summary of the results
Sample No. | Test item | Time (min) | OD mean * | Std Dev | % Viability |
1 - 3 | Negative control NaCl 0.9 % | 60 | 2.05 | 0.07 | 100.00 |
4 - 6 | Positive control 8N KOH | 60 | 0.01 | 0.00 |
0.38 |
13 - 15 |
4 -Amino-5-methylpyridon |
60 |
1.90 |
0.04 |
93.02 |
16 - 18 |
Negative control NaCl 0.9 % |
3 |
1.71 |
0.02 |
100.00 |
25 - 27 |
4 -Amino-5-methylpyridon |
3 |
1.88 |
0.12 |
109.87 |
* 6 values
Table 1: Tabular summary of the results
61ample No. | Test item | OD mean * | Std Dev | % Viability |
1 - 3 | Negative control NaCl 0.9 % |
1.66 |
0.01 |
100.00 |
4 - 6 |
Positive control SDS 5 % |
0.04 |
0.00 |
2.16 |
13 - 15 |
4 -Amino-5 -methylpyridon |
1.58 |
0.1 |
95.33 |
* 6 values
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Link to relevant study records
- Endpoint:
- eye irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- April 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 437 (Bovine Corneal Opacity and Permeability Test Method for Identifying i) Chemicals Inducing Serious Eye Damage and ii) Chemicals Not Requiring Classification for Eye Irritation or Serious Eye Damage)
- GLP compliance:
- yes (incl. QA statement)
- Specific details on test material used for the study:
- STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Solubility and stability of the test substance in the solvent/vehicle: Analytical determination of stability and homogeneity of the test item in the vehicle was not performed specifically for this study.
TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: The test item was suspended with a glass rod, a whirl mixer, and shaking shmily prior to application in isotonic saline solution to achieve a concentration of 20 % (w/v). During application the suspension was stirred on a magnet stirrer.
FORM AS APPLIED IN THE TEST (if different from that of starting material): The preparation was visually described as suspension. - Details on test animals or tissues and environmental conditions:
- Bovine eyes of slaughtered cattle were extracted and transferred in containers with Hank’s balanced salt solution (HBSS) with penicillin/streptomycin solution. For transportation the containers were ice cooled.
Eyes with defects were sorted out and disposed of, eyes without any defects were transferred into fresh HBSS supplemented with penicillin/streptomycin solution and 1 % FBS and stored overnight at 2-8 °C. On the next day (day of testing) the containers with the eyes were placed in an incubator at 32 ° C (± 1 ° C) for about 2 hours before preparation of the corneas. - Vehicle:
- physiological saline
- Controls:
- yes, concurrent positive control
- yes, concurrent negative control
- Amount / concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 750 μL per cornea and chamber
- Concentration (if solution): 20 % (w/v)
VEHICLE
- Amount(s) applied (volume or weight with unit): 750 μL per cornea and chamber
- Concentration (if solution): 0.9% NaCl (w/v) - Duration of treatment / exposure:
- 4 hours
- Duration of post- treatment incubation (in vitro):
- no further incubation required
- Number of animals or in vitro replicates:
- 3 cornea
- Details on study design:
- Immediately before application, the medium was aspirated from the anterior chamber. 750 μL of the test material formulations were applied to the corneas, each through the holes of the anterior chamber. The holes of both chambers were sealed with adhesive tape and the holders were kept with the front side up, so that the formulations covered the cornea sufficiently (closed chamber method). The holders were transferred into the incubator at 32 °C (± 1 °C) for the exposure time of 4 hours. After the exposure, the formulations were aspirated from the anterior chamber and the corneas were rinsed at least 3 times with phenol red containing MEM to show effectiveness of test substance removal. During the final rinse cycle the corneas were rinsed again with pure MEM medium in order to remove residues of the dye. The anterior chamber was then filled again with MEM medium to avoid drying out of the cornea. Before measuring opacity, fresh MEM medium was filled in the chambers.
Positive control: 20 % Imidazole in physiologic saline (w/v; 750 µL)
TREATMENT METHOD: closed chamber
POST-INCUBATION PERIOD: no
METHODS FOR MEASURED ENDPOINTS:
- Corneal opacity: The opacity of a cornea was measured by the diminution of light passing through the cornea. The measurements of opacity were carried out using an opacitometer BASF OP3.0 (with integrated light meter testo 545 and Comfort 3.4 SP6 software from Testo AG, Lenzkirch). Before each measurement the opacitometer was adjusted to about 1000 LUX and a filter calibration measurement was carried out by using 3 different filters.
- Corneal permeability:The medium in anterior chamber of each holder was replaced by 1ml of fluorescein sodium solution (concentration 5 mg/mL). Afterwards the holders were incubated at 32 °C (± 1 °C) for about 90 minutes. After the incubation period, the medium of the posterior chamber was aspirated by a syringe and filled into a 10 mL tube. Three wells of a 96 well plate were filled with 300 μL of each tube (triplicate determination). In addition, a standard series of 5 mg/mL sodium fluoresceinsolution was prepared and also filled into the 96-well plate, in triplicates.
The permeability was determined by measuring the amount of fluorescein sodium which diffused through all cell layers of the cornea. The measurement was carried out at a wavelength of 490 nm (OD490) by an ELISA - Reader (Bio-Tek EL 808, Software Gen5).
SCORING SYSTEM: In Vitro Irritancy Score (IVIS)
DECISION CRITERIA:decision criteria as indicated in the OECD TG 437 - Irritation parameter:
- in vitro irritation score
- Run / experiment:
- mean
- Value:
- -0.3
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Interpretation of results:
- other: negative
- Executive summary:
The test item (20 % (w/v) in isotonic saline) was tested in the BCOP test according to OECD TG 437. For determination of corneal damage opacity as well as tissue permeability was measured after a 4 hour exposure time. Based on these data, in comparison to the vehicle control, the mean In Vitro Irritancy Score (IVIS) value was calculated to be -0.3 which is below the IVIS cut-off threshold of 55 and thus identifying the test item as not inducing serious eye damage. The results of the positive (20 % imidazole solution) and negative (isotonic saline solution) controls confirmed the validity of the test system.
- Endpoint:
- eye irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- June 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- 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:
- July 2015
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Species:
- other: reconstructed human cornea-like epithelium (RhCE)
- 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) follows international OECD test guidelines. The EIT measures the ocular irritation potential of a test item by determination of cytotoxic effects on a reconstructed human cornea epithelium (RhCE) tissue model to discriminate chemicals not requiring classification for eye irritancy (UN GHS No Category) from those requiring classification. The EpiOcular™ EIT is not intended to differentiate between UN GHS Category 1 (serious eye damage) and UN GHS Category 2 (eye irritation).
DESCRIPTION OF THE CELL SYSTEM USED, INCL. CERTIFICATE OF AUTHENTICITY AND THE MYCOPLASMA STATUS OF THE CELL LINE :
The EpiOcular™ RhCE tissue construct consists of 3 viable layers of cells and a non-keratinized surface as recommended by the test guidelines. The model is standardized and commercially available. The cell viability and barrier function as well as sterility of each batch of the RhCE tissue construct used is adequate, as has been demonstrated by the supplier (MatTek Corporation, Slovakia).
ENVIRONMENTAL CONDITIONS :
The environmental conditions in the incubator were standardized as follows:
Incubator temperature: 37 +/- 2° C
CO2 gas concentration: 5 %
Humidity: maximum
All incubation steps were performed in a CO2 atmosphere incubator (Heraeus, Osterode, Germany). - 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 mg per tissue insert in duplicate
- Concentration (if solution): neat test item
POSITIVE CONTROL
- Amount(s) applied (volume or weight with unit): 50 μLper tissue insert in duplicate - Duration of treatment / exposure:
- 6 hours
- Duration of post- treatment incubation (in vitro):
- 18 hours
- Number of animals or in vitro replicates:
- tissue inserts were used in duplicate for test item, negative and positive control
- Details on study design:
- RhCE TISSUE CONSTRUCT USED, INCLUDING BATCH NUMBER :
EpiOcular RhCE tissue supplied by MatTek Corporation,
PRE-CHECK FOR POTENTIAL OPTICAL INTERFERENCES OF THE TEST ITEM :
Optical properties of the test item or its chemical action on MTT may interfere with the measurement of MTT formazan leading to a false estimate of tissue viability.
The test item was therefore tested in advance for a potential direct influence on the test results not related to cytotoxic effects on tissue cells. For this pre-check the following parameters were tested:
1. Assessment of potential direct MTT-reduction of the test item
In case of a direct MTT-reduction of the test item a killed tissue control (inserts, which were killed by freezing) was used in the main assay.
2. Assessment of potential interference of colored or staining test items, which become colored after application to the tissues, with OD read out
2.1. Assessment of the color reaction with water
2.2. Assessment of the color reaction with isopropanol
In case of an influence of test item color on OD measurement, a color control was used in the main assay.
The evaluation criteria for the pre-check were:
- For MTT reduction (visual assessment): If the MTT solution color turns blue/purple, the test item is presumed to have reduced the MTT. A killed control must be conducted.
- For color reaction (measurement of the OD): If, after subtraction of the OD for water or isopropanol the OD of the test item solution is >0.08 a Color Control must be conducted.
PROCEDURE FOR KILLED CONTROL OR COLOR CONTROL :
Killed control and color control not required.
DESCRIPTION OF THE METHOD USED TO QUANTIFY MTT FORMAZAN :
For viability testing the inserts were placed in new plates containing MTT solution (1 mg/ml in Maintenance medium at 37°C). The tissues were incubated for 180 ± 10 min. under standard culture conditions. The extraction of blue formazan was performed in isopropanol on a vertical shaker for 2-3 hours at room temperature. The concentration of formazan was measured by determination of the OD of the isopropanol-extracts in duplicate at 570 nm in an automatic reader of a spectrophotometer (EL808, Bio-Tek; 96 well format, 200 μl). Data acquisition and evaluation were performed with the software "Gen5" (Bio-Tek).
ASSAY ACCEPTANCE CRITERIA :
The following acceptance criteria determine the validity of an assay:
- mean OD 570 nm negative control (NC) is > 0.8 and < 2.5
- mean relative viability of the positive control (PC) is < 50 % (relative to negative control)
- the difference of viability between the two replicates is < 20 %. - Irritation parameter:
- other: final cell viability (%)
- Value:
- ca. 120
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- no indication of irritation
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Visible damage on test system: No
- Direct-MTT reduction: No - according to the results of the pre-check
- Colour interference with MTT: No - according to the results of the pre-check
DEMONSTRATION OF TECHNICAL PROFICIENCY:
- Reliability of the test was previously confirmed by interlaboratory validation
ACCEPTANCE OF RESULTS :
- Acceptance criteria met for negative control: yes
- Acceptance criteria met for positive control: yes - Interpretation of results:
- other: negative
- Executive summary:
An in vitro study for assessing ocular irritation properties of the test item was performed using the reconstructed human cornea-like epithelium (RhCE) cell model EpiOcularTM. The EpiOcularTM Eye Irritation Test (EIT) was conducted in accordance with OECD 492. The solid test item was applied topically to the RhCE tissue surface in duplicate for 6 hours, followed by an 18 hour post-treatment incubation period. Cell viability was measured in a spectrophotometer by assessing the extent of MTT (methylthiazole tetrazolium) reduction. The optical density value obtained for the test item was used to calculate the percentage of viability relative to the negative control, which was set at 100 %. The results of the concurrent negative control (NC, deionized water) and positive control (PC, neat methyl acetate) demonstrated the viability (NC) and sensitivity (PC) of the tissue model. As the final mean percent tissue viability recorded for the test item is above 60% (120%) relative to the negative control, the test item was characterized as having no eye irritating properties.
Referenceopen allclose all
Table 1: Individual values of opacity, permeability and IVIS
Cornea No. |
Opacity per cornea |
Permeability per cornea |
IVIS per cornea |
IVIS per group |
|
|
|
|
|
|
mean |
SD |
|
Negative control 1 |
-4 |
0.007 |
-3.9 |
|
|
|
0.9 % NaCl 2 |
1.1 |
0.007 |
1.2 |
-1.7 |
2.6 |
|
3 |
-2.5 |
0.007 |
-2.4 |
|
|
|
Positive Control 4 |
76.9 |
1.090 |
93.3 |
|
|
|
20 % Imidazole 5 |
64.8 |
1.613 |
89.0 |
95.4 |
7.7 |
|
6 |
92.9 |
0.737 |
104.0 |
|
|
|
Test item 10 |
1.1 |
-0.001 |
1.1 |
|
|
|
20% 4-Amino-5 -methylpyridon 11 |
1.8 |
0.000 |
1.8 |
-0.3 |
3.0 |
|
12 |
-3.8 |
0.000 |
-3.8 |
|
|
|
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
Justification for classification or non-classification
Based on the entire data for the test item no classification for skin corrosion/irritation according to Regulation (EC) No. 1272/2008 (CLP) is required.
Based on the entire data for the test item no classification for serious eye damage/eye irritation according to Regulation (EC) No. 1272/2008 (CLP) is required.
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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.
