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Toxicological information

Eye irritation

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Administrative data

Endpoint:
eye irritation: in vivo
Type of information:
other: data on Acid Blue 225_constituent 1
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Justification for type of information:
The experiment was conducted on one of the substance components. It should be noted that the lot tested was characterized by the Acid Blue 225_constituent 1 as main component; however, the impurity profile (which includes also the Acid Blue 225_constituent 2) resulted to be similar to that characterizing the substance under assessment (details are given in the document attached to IUCLID section 13).

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1974
Report date:
1974

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 405 (Acute Eye Irritation / Corrosion)
Principles of method if other than guideline:
The procedure adopted was the technique described in the "Appraisal of the Safety of Chemicals in Foods, Drugs and Cosmetics (1959) of the US Association of Food and Drug Officials (AFDO).
GLP compliance:
no

Test material

Constituent 1
Reference substance name:
Acid Blue 225_constituent 1
IUPAC Name:
Acid Blue 225_constituent 1

Test animals / tissue source

Species:
rabbit
Strain:
other: Russian Breed
Details on test animals or tissues and environmental conditions:
TEST ANIMALS
- Housing: rabbits were kept separately in V2A wire cages.
- Diet: food (NAFAG, Gossau SG, rabbit food), ad libitum.
- Water: ad libitum.
- Animal selection: only rabbits showing normal ophthalmic findings were included in the test.

Test system

Vehicle:
unchanged (no vehicle)
Controls:
yes, concurrent no treatment
Amount / concentration applied:
0.1 g
Duration of treatment / exposure:
about 30 seconds in 3 rabbits
Number of animals or in vitro replicates:
3 males and 3 females
Details on study design:
REMOVAL OF TEST SUBSTANCE
- Washing: the treated eyes of three rabbits were each rinsed with 10 ml lukewarm water.
- Time after start of exposure: about 30 seconds after treatment.

TOOL USED TO ASSESS SCORE: slit-lamp

SCORING SYSTEM
The reactions were appraised with a slit-lamp after 24 hours and after 2, 3, 4 and 7 days on the basis of the "Appraisal of the Safety of Chemicals in Foods, Drugs and Cosmetics" (1959) of the AFDO.

Cornea
A. Opacity-degree of density (area most dense taken for reading)
No opacity 0
Scattered or diffuse area, details of iris clearly visible 1
Easily discernible translucent areas, details of iris slightly obscured 2
Opalescent areas, no details of iris visible, size of pupil barely discernible 3
Opaque, iris invisible 4

B. Area of cornea involved
One quarter (or less) but not zero 1
Greater than one quarter, but less than half 2
Greater than half, but less than three quarters 3
Greater than three quarters, up to whole area 4
A x B x 5 Total maximum = 80

Iris
A. Values
Normal 0
Folds above normal, congestion, swelling, circumcorneal injection (any or all of these or combination of any thereof) iris still reacting to light (sluggish reaction is positive) 1
No reaction to light, hemorrhage, gross destruction (any or all of these) 2
A x 5

Conjunctivae
A. Redness (refers to palpebral and bulbar conjunctivae excluding cornea and iris)
Vessels normal 0
Vessels definitely injected above normal 1
More diffuse, deeper crimson red, individual vessels not easily discernible 2
Diffuse beefy red 3

B. Chemosis
No swelling 0
Any swelling above normal (includes nictitating membrane) 1
Obvious swelling with partial eversion of lids 2
Swelling with lids about half closed 3
Swelling with lids about half closed to completely closed 4

C. Discharge
No discharge 0
Any amount different from normal (does not include small amounts observed in inner canthus of normal animals) 1
Discharge with moistening of the lids and hairs just adjacent to lids 2
Discharge with moistening of the lids and hairs, and considerable area around the eye 3
(A + B + C) x 2 Total maximum = 20

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
cornea opacity score
Remarks:
rinsed eye
Basis:
animal: 3/3
Time point:
24/48/72 h
Score:
< 1
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Remarks:
rinsed eye
Basis:
animal: 3/3
Time point:
24/48/72 h
Score:
< 1
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Remarks:
rinsed eye
Basis:
animal: 3/3
Time point:
24/48/72 h
Score:
< 2
Reversibility:
fully reversible within: 24 hours
Irritation parameter:
chemosis score
Remarks:
rinsed eye
Basis:
animal: 3/3
Time point:
24/48/72 h
Score:
< 2
Reversibility:
fully reversible within: 24 hours
Irritant / corrosive response data:
The irritation index was found to be 5.8 for the cornea, 0 for the iris and 5 for the conjunctivae.

Any other information on results incl. tables

Scores when eyes were not rinsed

Days after application

Rabbit 4, male

Rabbit 5, male

Rabbit 6, male

Cornea

Iris

Conjunctiva

Cornea

Iris

Conjunctiva

Cornea

Iris

Conjunctiva

1

20

0

12

15

0

12

15

0

12

2

20

0

10

10

0

10

15

0

10

3

15

0

10

10

0

10

10

0

10

4

5

0

8

10

0

8

10

0

6

7

5

0

6

5

0

8

10

0

6

Scores when eyes were rinsed

Days after application

Rabbit 1, female

Rabbit 2, female

Rabbit 3, female

Cornea

Iris

Conjunctiva

Cornea

Iris

Conjunctiva

Cornea

Iris

Conjunctiva

1

0

0

6

0

0

0

0

0

6

2

0

0

0

0

0

0

0

0

0

3

0

0

0

0

0

0

0

0

0

4

0

0

0

0

0

0

0

0

0

7

0

0

0

0

0

0

0

0

0

Applicant's summary and conclusion

Conclusions:
Non irritating
Executive summary:

A study was performed to determine the eye irritation potential of test item in rabbits. The procedure adopted was the technique described in the "Appraisal of the Safety of Chemicals in Foods, Drugs and Cosmetics (1959) of the US Association of Food and Drug Officials (AFDO).

The substance was tested on 3 male and 3 female rabbits. Amounts of 0.1 g of the test substance were introduced into the conjunctival sac of the left eye with a spatula. The treated eyes of three rabbits were each rinsed with 10 ml lukewarm water about 30 seconds after treatment.

The total maximum is 80 for the cornea, 10 for the iris and 20 for the conjunctivae. The irritation index was found to be 5.8 for the cornea, 0 the iris and 5 for the conjunctivae.

Discussion and conclusion

It can be noted that in the study, 3 out of 6 animals did not receive rinsing any time after the instillation of the test substance in eyes. Not rinsing the treated eyes may lead to increased irritation response and does not represent the real time scenarios of eyes of workers getting exposed. Normally, any such incident will lead to rinsing of eyes immediately. Hence, not rinsing of eyes is an elevated testing condition and results normally do not have to be taken into account for hazard assessment.

According to the EC classification of the results obtained, the substance can be considered as non irritant to rabbit's eye.

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