4-Butoxy-2,3-difluorophenylboronic Acid (contains varying amounts of Anhydride)

Eye irritation

Administrative data

Endpoint:

eye irritation: in vitro / ex vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Apr 05, 2018 - Jun 04, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

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 28, 2015

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: DB-ALM Protocol No. 164: Ocular Irritation Assay for Chemicals using EpiOcular™ EIT,

Version / remarks:

September 14, 2015

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

other: EpiOcular Eye Irritation Test (OCL-200-EIT) for the prediction of acute ocular irritation of chemicals; For use with MatTek Corporation`s Reconstructed Human EpiOcular Model; MatTek Corporation

Version / remarks:

June 29, 2015

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

(4-butoxy-2,3-difluorophenyl)boronic acid

EC Number:

692-793-0

Cas Number:

156487-12-6

Molecular formula:

C10H13BF2O2

IUPAC Name:

(4-butoxy-2,3-difluorophenyl)boronic acid

Test material form:

solid

Specific details on test material used for the study:

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: No pre-treatment, the test item was applied neat to the tissues.

Test system

Vehicle:

unchanged (no vehicle)

Controls:

yes, concurrent positive control

yes, concurrent negative control

Amount / concentration applied:

TEST MATERIAL: 50 mg per tissue

NEGATIVE / VEHICLE CONTROL: 50 µL per tissue

Sterile deionized water was used as negative control.


POSITIVE CONTROL: 50 µL per tissue

Designation: Methyl acetate
Supplier: MatTek In Vitro Life Science Laboratories
Lot-No.: 022118ISA
Catalog #: TC-MA
Purity (GC): 99.7 %
Appearance: Colorless liquid
Expiration date: February 21, 2019
Storage: 15 to 30 °C

Duration of treatment / exposure:

6 hours

Number of animals or in vitro replicates:

in vitro: duplicate design

Results and discussion

In vitro

Results

Irritation parameter:

other: Viability %

Run / experiment:

Run 1 / Experiment 1

Value:

1.6

Vehicle controls validity:

not applicable

Negative controls validity:

valid

Positive controls validity:

valid

Remarks on result:

positive indication of irritation

Remarks:

According to OECD 492 no prediction can be made regarding the eye irritating potential.

Other effects / acceptance of results:

OTHER EFFECTS:
- Visible damage on test system: No observations

ACCEPTANCE OF RESULTS:
1. The negative control OD is > 0.8 and < 2.5 (1.671 and 1.474).
2. The mean relative viability of the positive control is below 50 % of the negative control viability (40.0 %).
3. The difference of viability between the two relating tissues of a single chemical is < 20 % (values between 1.1 % to 12.5 %) in the same run (for positive and negative control tissues and tissues of single chemicals).

The study met all acceptance criteria.

Any other information on results incl. tables

	Mean OD	Mean Viability
Negative Control	2.034	100.0 %
Positive Control	0.603	29.6 %
Test Item	0.033	1.6 %

Applicant's summary and conclusion

Interpretation of results:

other: UN GHS Category 1 or Category 2

Conclusions:

Under the conditions of the present study, the test item did show an eye hazard potential. The test item is considered to be UN GHS Category 1 or Category 2.