alkyl substituted aryl diazo heterocyclic aryl ester

Eye irritation

Administrative data

Endpoint:

eye irritation: in vitro / ex vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

June 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: compliant to GLP and testing guidelines, coherence between data, results and conclusion.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2015

Report date:

2015

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 437 (Bovine Corneal Opacity and Permeability Test Method for Identifying Ocular Corrosives and Severe Irritants)

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: OECD series on testing and assessment no. 160

Test guideline 3

Qualifier:

according to guideline

Guideline:

other: other guideline: Use of an alternate testing framework for classification of eye irritation potential of EPA pesticide products - Office of Pesticide Programs, U.S. Environmental Protection Agency (31 May 2013).

GLP compliance:

yes

Test material

Test material information

Constituent 1

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

Identity: Disperse Red DYGJ 0702

Test animals / tissue source

Strain:

not specified

Details on test animals or tissues and environmental conditions:

Test system: isolated corneas from the eyes of freshly slaughtered bovine.
Age of animals: 6-12 months
Transport solution: Hanks balanced salt solution (HBSS) Modified supplemented with Penicillin sulphate and Streptomycin sulphate.
Transport conditions: in transport solution at approximately 4°C.

Test system

Vehicle:

physiological saline

Amount / concentration applied:

The test item was spread on each epithelial surface of three idoneous bovine corneas as supplied (150 mg/cornea); 0.75 mL of
physiological saline was then added on each cornea in order to better distribute the substance on the cornea surface (final
concentration on cornea = 200 mg/mL, approximately 20% w/v)
Number of replicates: 3

Duration of treatment / exposure:

Corneas were exposed in horizontal position for 4 hours ± 10 minutes, incubated in a liquid bath at 32 ± 1°C.
There was no post-exposure period.

Details on study design:

Positive control item: corneas treated 20% (w/v) Imidazole (Sigma, batch no. 0001422794) in physiological saline (0.9% NaCl) (Baxter, batch no. 13D0406).
Negative control item: corneas treated with physiological saline (0.9% NaCl) (Baxter, batch no. 13D0406).
Volume of treatment: 0.75 mL
Number of replicates: 3

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

other: mean opacity score

Basis:

mean

Time point:

other: at the end of the test item exposure period

Score:

8

Remarks on result:

other: 4 h exposure time

Results 2

Irritation parameter:

other: mean permeability OD490 score

Basis:

mean

Time point:

other: 90 min

Score:

0.102

Remarks on result:

other: staining with a 0.5% solution of sodium fluorescein in DPBS for 90 minutes

Results 3

Irritation parameter:

other: In vitro irritancy score (IVIS)

Time point:

other: 4 h exposure + 90 min staining

Score:

9.5

Max. score:

55

Remarks on result:

other: In vitro irritancy score (IVIS) = mean opacity score + (15 x mean permeability OD490 score)

Applicant's summary and conclusion

Interpretation of results:

study cannot be used for classification

Remarks:

Migrated information

Conclusions:

The test item Disperse Red DYGJ 0702 cannot be clearly classified.

Executive summary:

The potential of the test item, Disperse Red DYGJ 0702, to cause corrosion/ severe irritation by using the Bovine Corneal Opacity and Permeability (BCOP) assay, was examined in agreement with OECD Guideline no. 437 (adopted on 26 July 2013), the Guidance Document OECD series on testing and assessment no. 160 and the method described in the document issued by U.S. EPA/OPP (31 May 2013). The test item was spread on each epithelial surface of three idoneous bovine corneas as supplied (150 mg/cornea); 0.75 mL of physiological saline was then added on each cornea in order to better distribute the substance on the cornea surface (final concentration on cornea = 200 mg/mL, approximately 20% w/v); an exposure period of 4 hours 10 minutes was used. The mean opacity of the corneas treated with the test item, detected with an opacitometer at the end of the 4-hour post-exposure period, was 8.0. At the macroscopic observation, a slight opacity was observed in all treated corneas. Two replicate treated tissues were slightly red coloured. After the determination of opacity, the epithelial surface was treated with a 0.5% solution of sodium fluorescein in DPBS for 90 minutes, to investigate alteration in cornea permeability. Mean OD490 value of the corneas treated with the test item was 0.1020. The results obtained indicate that the test item induced slight changes in cornea opacity and permeability under the reported experimental conditions. The calculated in vitro irritancy score (IVIS) for the test item is 9.5. Positive and negative controls [a 20% (w/v) Imidazole solution in physiological saline and physiological saline alone, respectively] were concurrently tested in similar conditions and gave the expected results. According to the OECD Guideline no. 437, the test item can not be clearly classified.