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Administrative data

Endpoint:
eye irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
26. Feb - 16. Apr 2002
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline conform GLP study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report date:
2002

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 405 (Acute Eye Irritation / Corrosion)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion)
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
Tetraethyl 2,2'-(1,4-phenylenedimethylidyne)bismalonate
EC Number:
228-726-5
EC Name:
Tetraethyl 2,2'-(1,4-phenylenedimethylidyne)bismalonate
Cas Number:
6337-43-5
Molecular formula:
C22H26O8
IUPAC Name:
1,3-diethyl 2-({4-[3-ethoxy-2-(ethoxycarbonyl)-3-oxoprop-1-en-1-yl]phenyl}methylidene)propanedioate
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder

Test animals / tissue source

Species:
rabbit
Strain:
New Zealand White
Details on test animals or tissues and environmental conditions:
TEST ANIMALS
- Source: Elevage Sientifique des Dombes, Chatillon sur Chalaronne, France
- Age at study initiation: 14 weeks (male), 13 weeks (females)
- Weight at study initiation: ca. 2.6 - 3.2 kg
- Housing: individually in stainless steel cages
- Diet (e.g. ad libitum): pelleted standard Provimi Kliba 3418 rabbit maintenance diet, ad libitum
- Water (e.g. ad libitum): community tap water, ad libitum
- Acclimation period: 6 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 17-23°C
- Humidity (%): 30-70%
- Air changes (per hr): 10-15
- Photoperiod (hrs dark / hrs light): 12/12

IN-LIFE DATES: From: 26. Feb. To: 16. Apr. 2002

Test system

Vehicle:
unchanged (no vehicle)
Controls:
not required
Amount / concentration applied:
0.1 g
Duration of treatment / exposure:
the treated eyes were not rinsed after instillation
Observation period (in vivo):
1, 24, 48 and 72 hours after application
Number of animals or in vitro replicates:
3
Details on study design:
The eyes were examined 1, 24, 48 and 72 hours after application of the test substance.

SCORING SYSTEM:

CORNEA
Degree of opacity (most dense area used)
No opacity ...................................................................................................................0
Scattered or diffuse areas, 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, ulzeration ..............................................................................4


IRIS
Normal ......................................................................................................................... 0
Folds above normal , congestion, swelling, circumcorneal injection (any of all of these or combination of any thereof); iris still reacting to light
(sluggish reaction is positive) ......................... .........................................................1
No reaction to light, haemorrhage, gross destruction (any or all of these) ......2

Redness
Blood vessels normal...............................................................................................................0
Blood vessels definitely injected above normal ................................................................. 1
More diffuse, deeper crimson red, individual blood vessels not easily discernible .....2
Diffuse beefy red......................................................................................................................3

Chemosi s (refers to palpebral and bulbar conjunctivae)
No swelling .........................................................................................0
Any swelling above normal (includes nictitating membran) ..... 1
Obvious swelling with partial eversion of l i d s ...........................2
Swelling with lids about half closed ................................................3
Swelling with lids half closed to completely closed.......................4

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
cornea opacity score
Basis:
animal #1
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
4
Irritation parameter:
cornea opacity score
Basis:
animal #2
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
4
Irritation parameter:
cornea opacity score
Basis:
animal #3
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
4
Irritation parameter:
iris score
Basis:
animal #1
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
2
Irritation parameter:
iris score
Basis:
animal #2
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
2
Irritation parameter:
iris score
Basis:
animal #3
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
2
Irritation parameter:
conjunctivae score
Basis:
animal #1
Time point:
other: 24, 48, 72 h
Score:
0.33
Max. score:
3
Reversibility:
fully reversible within: 48 h
Irritation parameter:
conjunctivae score
Basis:
animal #2
Time point:
other: 24, 48, 72 h
Score:
0.33
Max. score:
3
Reversibility:
fully reversible within: 48 h
Irritation parameter:
conjunctivae score
Basis:
animal #3
Time point:
other: 24, 48, 72 h
Score:
0.67
Max. score:
3
Reversibility:
fully reversible within: 72 h
Irritation parameter:
chemosis score
Basis:
animal #1
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
4
Irritation parameter:
chemosis score
Basis:
animal #2
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
4
Irritation parameter:
chemosis score
Basis:
animal #3
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
4
Irritant / corrosive response data:
Application of the test item to healthy rabbit conjunctivae resulted in a primary eye irritation score of 0.44.
The eye reactions (mean values 24 to 72 hours) consisted of grade 0.00 corneal opacity, grade 0.00 iris lesions, grade 0.44 redness of the conjunctivae and geade 0.00 chemosis of the conjunctivae.
No abnomal findings were observed in the cornea of any animal at any of the measuring intervals.
Moderate reddening of the conjunctivae was observed in all animals 1 hour after treatment.This effect decreased in severity in all animals at the 24-hour reading and was no longer evident 72 hours after treatment.
Slight swelling of the conjuctivae was apparent in all animals 1 hour after treatment. Slight to moderate reddening of the sclerae was evident in all animals at the 1-hour reading and slight reddening continued to be observed in two animals up to 24 hours after treatment.
No abnormal findings were observed in the treated eye of any animal 72 hours after treatment, the end of the observation period for all animals.
Other effects:
No clincal signs of systemic toxicity were observed in the animals during the study and no mortality occurred.
The body weights of all rabbits were considered to be within the normal range of variability.

Applicant's summary and conclusion

Interpretation of results:
not irritating
Remarks:
Migrated information Criteria used for interpretation of results: OECD GHS
Conclusions:
With reference the reported scores and the the reversibility of the effects of effects within 72 h the test substance does not have to be classified as irritant to the eyes according to the criteria laid down in the EU Classification Labelling and Packaging Regulation (1272/2008/EC).
Executive summary:

The substance was tested for its eye irritant properties in 3 New Zealand White rabbits. The study was performed according to OECD Guideline 405.

Effects on conjunctivae (redness and swelling) were observed in all animals one hour after application. These signs were fully reversible within 72 hours.

With reference the reported scores and the the reversibility of the effects of effects within 72 h the test item does not have to be classified as irritant to the eyes according to the criteria laid down in the EU Classification Labelling and Packaging Regulation (1272/2008/EC).