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EC number: 951-920-2 | CAS number: -
- 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:
- 12 Nov 2018 to 13 Nov 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
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)
- GLP compliance:
- yes
Test material
- Reference substance name:
- (1s,3s)-N1-methyl-N1-{7H-pyrrolo[2,3-d]pyrimidin-4-yl}cyclobutane-1,3-diamine; phosphoric acid
- EC Number:
- 951-920-2
- Molecular formula:
- C11H15N5* H3PO4
- IUPAC Name:
- (1s,3s)-N1-methyl-N1-{7H-pyrrolo[2,3-d]pyrimidin-4-yl}cyclobutane-1,3-diamine; phosphoric acid
1
- Specific details on test material used for the study:
- Purity/Composition: 100%
Test animals / tissue source
- Species:
- cattle
- Strain:
- not specified
- Details on test animals or tissues and environmental conditions:
- Source: Bovine eyes from young cattle were obtained from the
slaughterhouse (Vitelco, -'s Hertogenbosch, The Netherlands),
where the eyes were excised by a slaughterhouse employee as
soon as possible after slaughter.
Transport: Eyes were collected and transported in physiological saline in a
suitable container under cooled conditions.
Test system
- Vehicle:
- unchanged (no vehicle)
- Remarks:
- Since no workable suspension of PF-03817968-09 in physiological saline could be obtained, the test item was used as delivered by the sponsor and added pure on top of the corneas.
- Controls:
- yes, concurrent positive control
- yes, concurrent negative control
- Amount / concentration applied:
- PF-03817968-09 was weighed in a bottle and applied directly on the corneas in such a way
that the cornea was completely covered (302.7 to 363.5 mg) - Duration of treatment / exposure:
- The test consists of topical application of PF-03817968-09 on the epithelium of the bovine cornea. The non-surfactant solid test item is applied neat by direct application to the surface of the cornea. Corneas were incubated in a horizontal position for 240 ± 10 minutes at 32 ± 1°C. After exposure the corneas were thoroughly rinsed. The opacity of the corneas was determined directly after treatment and the permeability of the corneas was determined after a 90 minutes incubation period with sodium fluorescein.
- Number of animals or in vitro replicates:
- Three corneas were selected at random for each treatment group.
- Details on study design:
- Treatment of Corneas and Opacity Measurements
The medium from the anterior compartment was removed and 750 µl of either the negative
control, positive control (20% (w/v) Imidazole solution) onto the epithelium of the cornea.
PF-03817968-09 was weighed in a bottle and applied directly on the corneas in such a way
that the cornea was completely covered (302.7 to 363.5 mg). The holder was slightly rotated,
with the corneas maintained in a horizontal position, to ensure uniform distribution of the
solutions over the entire cornea. Corneas were incubated in a horizontal position for
240 ± 10 minutes at 32 ± 1°C. After the incubation the solutions and the test compound were
removed and the epithelium was washed at least three times with MEM with phenol red
(Earle’s Minimum Essential Medium Life Technologies). Possible pH effects of the test item
on the corneas were recorded. Each cornea was inspected visually for dissimilar opacity
patterns. The medium in the posterior compartment was removed and both compartments
were refilled with fresh cMEM and the opacity determinations were performed.
Opacity Measurement
The opacity of a cornea was measured by the diminution of light passing through the cornea.
The light was measured as illuminance (I = luminous flux per area, unit: lux) by a light meter.
The opacity value (measured with the device OP-KIT) was calculated according to:
((𝐼0 / 𝐼 )- 0.9894 )/ 0.0251
With I0 the empirically determined illuminance through a cornea holder but with windows
and medium, and I the measured illuminance through a holder with cornea.
The change in opacity for each individual cornea (including the negative control) was
calculated by subtracting the initial opacity reading from the final post-treatment reading.
The corrected opacity for each treated cornea with the test item or positive control was
calculated by subtracting the average change in opacity of the negative control corneas from
the change in opacity of each test item or positive control treated cornea.
The mean opacity value of each treatment group was calculated by averaging the corrected
opacity values of the treated corneas for each treatment group.
Application of Sodium Fluorescein
Following the final opacity measurement, permeability of the cornea toNa-fluorescein
(Sigma-Aldrich, Germany) was evaluated.
The medium of both compartments (anterior compartment first) was removed. The posterior
compartment was refilled with fresh cMEM. The anterior compartment was filled with 1 mL
of 5 mg Na-fluorescein/mL cMEM solution (Sigma-AldrichChemie GmbH,Germany). The
holders were slightly rotated, with the corneas maintained in a horizontal position, to ensure
uniform distribution of the sodium-fluorescein solution over the entire cornea. Corneas were
incubated in a horizontal position for 90 ± 5 minutes at 32 ± 1°C.
Permeability Determinations
After the incubation period, the medium in the posterior compartment of each holder was
removed and placed into a sampling tube labelled according to holder number. 360 µl of the
medium from each sampling tube was transferred to a 96-well plate. The optical density at
490nm(OD490) of each sampling tube was measured in triplicate using a microplate reader
(TECAN Infinite® M200 Pro Plate Reader).
Opacity =
Any OD490 that was 1.500 or higher was diluted to bring the OD490 into the acceptable range
(linearity up to OD490 of 1.500 was verified before the start of the experiment). OD490 values
of less than 1.500 were used in the permeability calculation.
The mean OD490 for each treatment was calculated using cMEM corrected OD490 values. If a
dilution has been performed, the OD490 of each reading of the positive control and the test
item was corrected for the mean negative control OD490 before the dilution factor was applied
to the reading.
Results and discussion
In vitro
Resultsopen allclose all
- Irritation parameter:
- in vitro irritation score
- Run / experiment:
- Mean
- Value:
- ca. 0.2
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- no indication of irritation
- Irritation parameter:
- cornea opacity score
- Run / experiment:
- Mean
- Value:
- ca. -1.9
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- no indication of irritation
- Irritation parameter:
- other: Permeability
- Run / experiment:
- Mean
- Value:
- ca. 0.14
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- no indication of irritation
- Other effects / acceptance of results:
- The negative control responses for opacity and permeability were less than the upper limits of
the laboratory historical range indicating that the negative control did not induce irritancy on
the corneas. The mean in vitro irritancy score of the positive control (20% (w/v) Imidazole)
was 140 and within two standard deviations of the current historical positive control mean.
It was therefore concluded that the test conditions were adequate and
that the test system functioned properly.
PF-03817968-09 did not induce ocular irritation through both endpoints, resulting in a mean
in vitro irritancy score of 0.2 after 240 minutes of treatment.
Any other information on results incl. tables
PF-03817968-09 was tested as it is. The corneas treated with the negative control item were clear after the 240 minutes of treatment. The individual positive control in vitro irritancy scores ranged from 116 to 168. The corneas treated with the positive control were turbid after the 240 minutes of treatment. The corneas treated with PF-03817968-09 showed opacity values ranging from -3.2 to -0.6 and permeability values ranging from 0.052 to 0.264. The corneas were clear after the 240 minutes of treatment with PF-03817968-09. A pH effect of the test item was observed on the rinsing medium, the corneas were rinsed until no colour change of the medium was observed. Therefore, the in vitro irritancy scores ranged from -1.2 to 1.0 after 240 minutes of treatment with PF-03817968-09.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- In conclusion, since PF-03817968-09 induced an IVIS ≤ 3, no classification is required for eye irritation or serious eye damage
- Executive summary:
The objective of this study was to evaluate the eye hazard potential of PF-03817968-09 as measured by its ability to induce opacity and increase permeability in an isolated bovine cornea using the Bovine Corneal Opacity and Permeability test (BCOP test). This report describes the potency of chemicals to induce serious eye damage using isolated bovine corneas. The eye damage ofPF-03817968-09 was tested through topical application for approximately 240 minutes. The study procedures described in this report were based on the most recent OECD guideline. PF-03817968-09 was a white to off-white solid with a purity of 100%. Since no workable suspension in physiological saline could be obtained, the test item was used as delivered and added pure on top of the corneas. The negative control responses for opacity and permeability were less than the upper limits of the laboratory historical range indicating that the negative control did not induce irritancy on the corneas. The mean in vitro irritancy score of the positive control (20% (w/v) Imidazole) was 140 and within two standard deviations of the current historical positive control mean. It was therefore concluded that the test conditions were adequate and that the test system functioned properly. PF-03817968-09 did not induce ocular irritation through both endpoints, resulting in a mean in vitro irritancy score of 0.2 after 4 hours of treatment.
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