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EC number: 236-910-1 | CAS number: 13537-82-1
- 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:
- 06 April 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
- Report date:
- 2017
Materials and methods
Test guideline
- 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)
- Version / remarks:
- 26 July 2013
- Deviations:
- no
- GLP compliance:
- yes
Test material
- Reference substance name:
- Ethyl 4-methyl-2-oxocyclohexanecarboxylate
- EC Number:
- 236-910-1
- EC Name:
- Ethyl 4-methyl-2-oxocyclohexanecarboxylate
- Cas Number:
- 13537-82-1
- Molecular formula:
- C10H16O3
- IUPAC Name:
- ethyl 4-methyl-2-oxocyclohexane-1-carboxylate
- Test material form:
- liquid
- Details on test material:
- Physical appearance: Clear colourless liquid
Storage conditions: In refrigerator (2-8°C) in clear glass bottle
Constituent 1
- Specific details on test material used for the study:
- Stability at higher temperatures: maximum temperature: 50°C, maximum duration: 1440 minutes
Test animals / tissue source
- Species:
- cattle
- Details on test animals or tissues and environmental conditions:
- SOURCE OF COLLECTED EYES
- Source: young cattle, obtained from the slaughterhouse Vitelco, 's-Hertogenbosch, The Netherlands.
- Storage, temperature and transport conditions of ocular tissue: eyes were excised by a slaughterhouse employee as soon as possible after slaughter. Subsequently, eyes were collected an transported in physiological saline in a suitable container under cooled conditions.
- The eyes were checked for unacceptable defects and those exhibiting defects were discarded.
Test system
- Vehicle:
- unchanged (no vehicle)
- Controls:
- yes, concurrent positive control
- yes, concurrent negative control
- Amount / concentration applied:
- TEST MATERIAL
- Amount applied: 750 µL
NEGATIVE CONTROL: Physiological saline
- Amount applied: 750 µL
POSITIVE CONTROL: Ethanol
- Amount applied: 750 µL - Duration of treatment / exposure:
- 10 ± 1 minutes
- Duration of post- treatment incubation (in vitro):
- 120 ±10 minutes in cMEM for opacity measurements and subsequently 90 ±5 minutes in sodium-fluorescein for permeability determinations
- Number of animals or in vitro replicates:
- 3 for the negative control, the positive control and the treatment group each
- Details on study design:
- TREATMENT METHOD: The medium from the anterior compartment was removed and 750 µl of either the negative control, the positive control or the test item was introduced onto the epithelium of the cornea. Corneas were incubated in a horizontal position for 10 ± 1 minutes at 32 ± 1°C.
REMOVAL OF TEST SUBSTANCE
- Number of washing steps after exposure period: After the incubation the solutions were removed and the epithelium was washed with MEM with phenol red (Earle’s Minimum Essential Medium, Life Technologies) and thereafter with cMEM.
- POST-EXPOSURE INCUBATION: 120 ±10 minutes in cMEM for opacity measurements and subsequently 90 ±5 minutes in sodium-fluorescein for permeability determinations
METHODS FOR MEASURED ENDPOINTS:
- Corneal opacity: opacity meter (OP-KIT)
- Corneal permeability: passage of sodium fluorescein dye measured with the aid of a microtiter plate reader (TECAN Infinite® M200 Pro Plate Reader, OD490). OD490 values of less than 1.500 were used in the permeability calculation.
- Other: possible pH effects of the test substance on the corneas were recorded.
SCORING SYSTEM: In Vitro Irritancy Score (IVIS)
DECISION CRITERIA (see table 1):
A test substance that induces an IVIS ≤ 3 is not classified for eye irritancy (UN GHS: no category);
A test substance that induces IVIS >55 is defined as a corrosive or severe irritant (UN GHS: category 1);
For a test substance that induces an IVIS >3 and ≤55, no prediction on irritant potency can be made.
ACCEPTABILITY CRITERIA
The assay is considered acceptable if:
- The positive control gives an in vitro irritancy score that falls within two standard deviations of the current historical mean.
- The negative control responses should result in opacity and permeability values that are less than the upper limits of the laboratory historical range
Results and discussion
In vitro
Results
- Irritation parameter:
- in vitro irritation score
- Remarks:
- Mean of 3 replicates
- Value:
- 0
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Other effects / acceptance of results:
- - The corneas treated with the test item showed opacity values between -1.4 and 0.6, permeability values were ranging from 0.001 to 0.0.26 and IVIS were -1.0, 0.4 and 0.7 (n=3).
- Since the mean IVIS was < 3 after 10 minutes of treatment, the test item is not classified according to GHS and Regulation (EC) No. 1272/2008.
OTHER EFFECTS:
- No pH effect of the test item was observed on the rinsing medium
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: yes, results were within the historical range (IVIS ranging from -0.4 to 0.5)
- Acceptance criteria met for positive control: yes, results were within historical range (IVIS ranging from 38-59). Corneas were turbid after 10 minutes of treatment.
Any other information on results incl. tables
Table 2 Historical data for the BCOP studies
|
Negative control |
Positive control |
||
|
Opacity |
Permeability |
In vitroIrritancy Score |
In vitro Irritancy Score |
Range |
-2.9 – 3.0 |
-0.016 – 0.042 |
-2.8 – 3.0 |
34.7 – 78.2 |
Mean |
0.12 |
0.01 |
0.32 |
56.68 |
SD |
1.07 |
0.01 |
1.17 |
12.64 |
n |
72 |
65 |
66 |
47 |
SD = Standard deviation
n = Number of observations
The above mentioned historical control data range of the controls were obtained by collecting all data over the period of February 2014 to February 2017.
Table 3 Individual permeability scores (corrected)
Treatment |
Dilution factor |
Negative control corrected OD49011 |
Negative control corrected OD49021 |
Negative control corrected OD49031 |
Negative control corrected OD490 Average |
Negative control corrected final OD490 |
Average OD |
|
|||||||
Positive control |
6 |
0.352 |
0.354 |
0.350 |
0.352 |
2.112 |
1.992 |
1 |
0.989 |
0.981 |
0.984 |
0.985 |
0.985 |
||
6 |
0.484 |
0.475 |
0.480 |
0.480 |
2.878 |
||
|
|||||||
Test item |
1 |
0.025 |
0.026 |
0.026 |
0.026 |
0.026 |
0.011
|
1 |
-0.001 |
0.005 |
0.000 |
0.001 |
0.001 |
||
1 |
-0.002 |
0.008 |
0.008 |
0.005 |
0.005 |
1 OD490values corrected for the mean final negative control permeability (0.005).
2 Calculations are made without rounding off.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Remarks:
- Not classified according to Regulation (EC) No. 1272/2008
- Conclusions:
- In the Bovine Corneal Opacity and Permeability test (BCOP) performed according to OECD guideline 437 and GLP principles, FRET 13-0545 induced a mean IVIS of 0.0 after 10 minutes of treatment. Based on these results, the substance is not classified according to GHS and Regulation (EC) No. 1272/2008.
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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