Benzoic acid, 4-[4-(2-oxiranyl)butoxy]-, 4-methoxyphenyl ester

Eye irritation

Administrative data

Endpoint:

eye irritation: in vitro / ex vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

31-May-2011 to 01-Jun-2011

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:

2011

Report date:

2011

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

other: OECD guideline 437 “Bovine corneal opacity and permeability (BCOP) test method for identifying ocular corrosives and severe irritants”

Deviations:

no

Test guideline 2

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

Test material information

Constituent 1

Reference substance name:

-

EC Number:

435-360-1

EC Name:

-

Cas Number:

144447-11-0

Molecular formula:

C20H22O5

IUPAC Name:

4-methoxyphenyl 4-[4-(oxiran-2-yl)butoxy]benzoate

Details on test material:

- Name of test material (as cited in study report): Epoxyhexmes
- Substance type: White to off-white powder
- Physical state: Solid
- Storage condition of test material: At room temperature in the dark

Test system

Vehicle:

unchanged (no vehicle)

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): approx. 300 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:
A test substance that induces an IVIS ≥ 55.1 is defined as a corrosive or severe irritant

Results and discussion

In vivo

Results

Irritation parameter:

other: In vitro irritancy score (IVIS)

Basis:

mean

Time point:

other: 240 minutes

Score:

0.2

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: OECD GHS

Conclusions:

Epoxyhexmes is not irritant or corrosive in the Bovine Corneal Opacity and Permeability test

Executive summary:

The negative control responses of the opacity and permeability values were less than the upper limits of the laboratory historical rangeindicating that the negative control did not induce irritancy on the corneas.The meanin vitro irritancy score of the positive control (20% (w/v) Imidazole) was 103 and within the historical positive controldata range.It was therefore concluded that the test conditions were adequate and that the test system functioned properly.

Epoxyhexmes did not induce ocular irritation through both endpoints, resulting in a mean in vitro irritancy score of 0.2 after 240 minutes of treatment.