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Administrative data

Endpoint:
eye irritation: in vitro / ex vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
08-apr-2015 to 09-apr-2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study has been performed according to OECD and/or EC guidelines and according to GLP principles.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report date:
2015

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: 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”
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: EU Method B.47 “Bovine corneal opacity and permeability method for identifying ocular corrosives and severe irritants
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
(2S)-2-(1,3-DIOXO-2,3-DIHYDRO-1H-ISOINDOL-2-YL)PENTANEDIOIC ACID
EC Number:
608-945-6
Cas Number:
340-90-9
Molecular formula:
C13H11NO6
IUPAC Name:
(2S)-2-(1,3-DIOXO-2,3-DIHYDRO-1H-ISOINDOL-2-YL)PENTANEDIOIC ACID
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
- Name of test material (as cited in study report): Phthalyl-L-Glu
- Substance type:White powder
- Physical state: powder
- Storage condition of test material: At room temperature

Test system

Vehicle:
unchanged (no vehicle)
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 355.4 to 375.7 mg per cornea

NEGATIVE CONTROL
- Amount(s) applied (volume or weight with unit): 750 µl of physiological saline per cornea

POSITIVE CONTROL
Amount(s) applied (volume or weight with unit): 750 µl per cornea
Concentration (if solution): 20% (w/v) Imidazole


Duration of treatment / exposure:
240 minutes
Details on study design:
TEST SITE
- Isolated bovine cornea

REMOVAL OF TEST SUBSTANCE
- Washing (if done): yes
- Time after start of exposure: 240 minutes

SCORING SYSTEM:
- After exposure the cornea is thoroughly rinsed to remove the test substance followed by immediate opacity measurement and permeability evaluation of the cornea.

- The mean opacity and mean permeability values (OD490) were used for each treatment group to calculate an in vitro score:

In vitro irritancy score (IVIS) = mean opacity value + (15 x mean OD490 value).


TOOL USED TO ASSESS SCORE:
- opacitymeter and microplate reader

DATA EVALUATION:
In vitro score range UN GHS
≤ 3 No Category
> 3; ≤ 55 No prediction can be made
>55 Category 1

Results and discussion

In vitro

Results
Irritation parameter:
in vitro irritation score
Run / experiment:
1
Value:
79
Negative controls validity:
valid
Positive controls validity:
valid
Remarks on result:
positive indication of irritation

Applicant's summary and conclusion

Interpretation of results:
Category I
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
Since Phthalyl-L-Glu induced an IVIS ≥ 55, it is concluded that Phthalyl-L-Glu induces serious eye damage in the Bovine Corneal Opacity and Permeability test under the experimental conditions OECD 437 described in this report and should be classified category 1 according to the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) of the United Nations.

Executive summary:

The negative control responses of the opacity and permeability values 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 117 and within the historical positive control data range. It was therefore concluded that the test conditions were adequate and that the test system functioned properly.

Phthalyl-L-Glu induced serious eye damage through both endpoints, resulting in a mean in vitro irritancy score of 79 after 240 minutes of treatment.