Sodium 3-diazo-3,4-dihydro-4-oxonaphthalene-1-sulphonate

Eye irritation

Administrative data

Endpoint:

eye irritation: in vitro / ex vivo

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

October 10, 2017 - January 29, 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 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)

Version / remarks:

2017

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU method B.47 (Bovine corneal opacity and permeability test method for identifying ocular corrosives and severe irritants)

Version / remarks:

Commission Regulation (EU) 2017/735 of 14 February 2017 amending, for the purpose of its adaption to technical progress, the Annex to Regulation (EC) No 440/2008 laying down test methods pursuant to Regulation (EC) No 1907/2006 of the European Parliament and the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH).

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Sodium 3-diazo-3,4-dihydro-4-oxonaphthalene-1-sulphonate

EC Number:

264-719-3

EC Name:

Sodium 3-diazo-3,4-dihydro-4-oxonaphthalene-1-sulphonate

Cas Number:

64173-96-2

Molecular formula:

C10H6N2O4S.Na

IUPAC Name:

sodium 3-diazo-3,4-dihydro-4-oxonaphthalene-1-sulphonate

Test material form:

solid

Specific details on test material used for the study:

PREPARATION OF THE TEST MATERIAL
The test item was prepared as a 20% (w/v) solution in a 0.9% sodium chloride solution. The stability in the vehicle was not investigated. The test item preparation was administered within <1 hour after preparation.

Test system

Vehicle:

physiological saline

Controls:

yes, concurrent vehicle

yes, concurrent positive control

Amount / concentration applied:

TEST MATERIAL: 750 µL (i.e. 150mg/750µL)

NEGATIVE / VEHICLE CONTROL: 750 µL

Designation: 0.9% sodium chloride solution
Supplier: B. Braun Melsungen AG, Germany
Batch: 16455011
Storage: 2 to 8°C
Released until: October 2019


POSITIVE CONTROL: 750 µL

Designation: Art. 814223
Synonym: Imidazole
Supplier: Merck KGaA, Germany
Batch: S6746923
Purity (GC) 99.8% (a/a)
Storage: At room temperature
Released until: August 31, 2018

Imidazole was dissolved with 0.9% sodium chloride solution to a concentration of 20% (w/v).

Duration of treatment / exposure:

240 minutes

Number of animals or in vitro replicates:

in vitro: triplicate design

Results and discussion

In vitro

Results

Irritation parameter:

in vitro irritation score

Run / experiment:

Run 1 / Experiment 1

Value:

12.5

Vehicle controls validity:

valid

Negative controls validity:

valid

Positive controls validity:

valid

Remarks on result:

not determinable

Remarks:

According to OECD 437 no prediction can be made regarding the eye hazard potential of the test item.

Other effects / acceptance of results:

OTHER EFFECTS:
- After treatment with test item a slightly yellowish staining of the corneas was observed.

ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: After treatment with the negative control (0.9% sodium chloride solution) the calculated IVIS was -0.6 and, thus, within three standard deviations of the current historical mean of the negative control (IVIS: -1.4 – 3.2).
- Acceptance criteria met for positive control: After treatment with the positive control (20% Imidazole) the calculated IVIS was 116.5 and, thus, also within two standard deviations of the current historical mean of the positive control (IVIS: 81.2 – 132.9).

Therefore, the study fulfilled the acceptance criteria.

Any other information on results incl. tables

		Opacity	Permeability	IVIS
				per cornea	per group (mean value)	SD
Negative control	0.9% NaCl Solution	-0.8	-0.003	-0.845	-0.6	0.3
		-0.2	-0.002	-0.230
		-0.7	-0.003	-0.745
Positive control	20% Imidazole solution	73.2	2.967	117.705	116.5	15.5
		87.0	2.957	131.355
		77.0	1.558	100.370
Test item	Test item	12.4	0.018	12.670	12.5	1.1
		13.3	0.013	13.495
		11.2	0.009	11.335

Applicant's summary and conclusion

Interpretation of results:

other: no prediction can be made

Conclusions:

Under the conditions of the present study, the eye hazard potential of the test item cannot be predicted.

Executive summary:

This study was performed according to GLP and the methods applied are fully compliant with OECD TG 437. Under the conditions of the present study, the eye hazard potential of the test item cannot be predicted.