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Toxicological information

Eye irritation

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Administrative data

Endpoint:
eye irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25 May 1995 - 28 July 1995
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1995
Report Date:
1995

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 405 (Acute Eye Irritation / Corrosion)
Deviations:
no
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Type:
Constituent
Type:
Constituent
Type:
Constituent
Type:
Constituent
Type:
Constituent
Type:
impurity
Type:
impurity
Type:
impurity
Type:
impurity
Type:
impurity
Test material form:
liquid

Test animals / tissue source

Species:
rabbit
Strain:
New Zealand White
Details on test animals or tissues and environmental conditions:
TEST ANIMALS
- Source: B&K Universal G.J., Barcelona, Spain
- Gender: male
- Age upon arrival at test facility: approx. 9-10 weeks
- Weight at study initiation: 2.2 - 2.4 kg
- Housing: individually in stainless steel cages (48 x 59 x 37 cm) with grilled floor
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: 7 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18-22
- Humidity (%): 50-85
- Photoperiod (hrs dark / hrs light): 12 / 12

IN-LIFE DATES: From: 30 May 1995 To: 27 June 1995

Test system

Vehicle:
unchanged (no vehicle)
Controls:
no
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.1 mL
Duration of treatment / exposure:
Single instillation
Observation period (in vivo):
21 days
Number of animals or in vitro replicates:
3 males
Details on study design:
ADMINISTRATION OF TEST SUBSTANCE
- Location: into the right conjunctival sac, made accessible by carefully pulling lower lid down
- Procedure immediately after instillation: lids of treated eye held closed for approx. 10 sec

OBSERVATION TIMEPOINTS: 1, 24, 48, 72 hours, and on day 7, 14 and 21 after instillation

SCORING SYSTEM: Draize scoring on conjunctivae, iris and cornea (as per OECD test guideline 405 recommendations)

TOOL USED TO ASSESS SCORE:
- Use of hand-slit lamp / biomicroscope: not specified
- Use of fluorescein: for all observations except 1 h after instillation

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
cornea opacity score
Basis:
animal #1
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible within: 21 d
Remarks on result:
probability of mild irritation
Irritation parameter:
cornea opacity score
Basis:
animal #1
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible within: 7 d
Remarks on result:
probability of mild irritation
Irritation parameter:
iris score
Basis:
animal #1
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible within: 14 d
Remarks on result:
probability of moderate irritation
Irritation parameter:
iris score
Basis:
animal #2
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible within: 14 d
Remarks on result:
probability of moderate irritation
Irritation parameter:
iris score
Basis:
animal #3
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible within: 7 d
Remarks on result:
probability of moderate irritation
Irritation parameter:
conjunctivae score
Basis:
animal #1
Time point:
24/48/72 h
Score:
2.67
Max. score:
3
Reversibility:
fully reversible within: 14 d
Remarks on result:
probability of moderate irritation
Irritation parameter:
conjunctivae score
Basis:
animal #2
Time point:
24/48/72 h
Score:
3
Max. score:
3
Reversibility:
fully reversible within: 21 d
Remarks on result:
probability of moderate irritation
Irritation parameter:
conjunctivae score
Basis:
animal #3
Time point:
24/48/72 h
Score:
2.67
Max. score:
3
Reversibility:
fully reversible within: 21 d
Remarks on result:
probability of moderate irritation
Irritation parameter:
chemosis score
Basis:
animal #1
Time point:
24/48/72 h
Score:
1.33
Max. score:
2
Reversibility:
fully reversible within: 21 d
Remarks on result:
probability of mild irritation
Irritation parameter:
chemosis score
Basis:
animal #2
Time point:
24/48/72 h
Score:
2.33
Max. score:
3
Reversibility:
fully reversible within: 14 d
Remarks on result:
probability of moderate irritation
Irritation parameter:
chemosis score
Basis:
animal #3
Time point:
24/48/72 h
Score:
2
Max. score:
2
Reversibility:
not fully reversible within: 21
Remarks on result:
probability of severe irritation
Irritant / corrosive response data:
See table below

Any other information on results incl. tables

Animal number

1 h

24 h

48 h

72 h

7 d

14 d

21 d

Individual score*

Cornea

299

0

1

1

1

1

1

0

1

289

0

1

1

1

0

0

0

1

190

0

1

1

1

0

0

0

1

 

Mean score

1

Iris

299

1

1

1

1

1

0

0

1

289

1

1

1

1

1

0

0

1

190

1

1

1

1

0

0

0

1

 

Mean score

1

Conjunctival redness

299

3

3

3

2

1

0

0

2.67

289

2

3

3

3

2

1

0

3

190

2

3

3

2

1

1

0

2.67

 

Mean score

2.78

Conjunctival chemosis

299

2

2

1

1

1

1

0

1.33

289

3

3

2

2

1

0

0

2.33

190

2

2

2

2

1

1

1

2

 

Mean score

1.89

* For the 24, 48 and 72 h timepoints

Details of eye irritation scores (according to Draize)

Applicant's summary and conclusion

Interpretation of results:
Category 1 (irreversible effects on the eye) based on GHS criteria
Conclusions:
Cocamidopropyl hydroxysultaine, as a 41.5% solution, is considered a severe eye irritant.
Executive summary:

Cocamidopropyl hydroxysultaine, as a 41.5% solution (Betadet SHR), has been tested for acute eye irritation on 3 male New Zealand White rabbits, in accordance with OECD test guideline 405, and in compliance with Good Laboratory Practice.

The test article was applied as such in a single conjunctival dose of 0.1 mL in the right eye of each rabbit, the untreated eye being used as a control. Ocular examinations, grading cornea, iris and conjunctiva (redness and chemosis) reactions, were performed at 1, 24, 48, 72 hours, and on day 7, 14 and 21 after instillation of the test article.

Within the first hour following instillation, the test article induced conjunctival abnormalities including hyperhaemia ranging from grade 2 (diffuse, crimson color, individual vessels not easily discernible) to grade 3 (diffuse, deep red color), edema ranging from grade 2 to 3, redness of the bulbar conjunctivae, lacrimation and congestion and injection of the iris (grade 1).

At the observations carried out 24, 48 and 72 hours after instillation, all rabbits showed hyperhaemia ranging from grade 2 to grade 3, chemosis from grade 1 to grade 3, redness of the bulbar conjunctivae, lacrimation and congestion and injection of the iris (grade 1). Corneal opacity (grade 1) was also observed in all animals.

Some of the corneal and conjunctival abnormalities persisted up to day 14 after instillation inclusive. Conjunctival chemosis was still observed in one of the rabbits 21 days after instillation of the test article.

 

Based on these results, Cocamidopropyl hydroxysultaine, as a 41.5% solution, was considered a severe eye irritant.