Registration Dossier
Registration Dossier
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EC number: 948-068-9 | CAS number: -
Eye irritation
Administrative data
- Endpoint:
- eye irritation: in vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- before 1998
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- Source is a published peer reviewed tabulation of detailed results from in house eye irritation studies performed to guideline that is intended as a reference work for the development of in vitro studies. The work is published by a reputable organisation and is therefore considered reliable.
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 1 998
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 405 (Acute Eye Irritation / Corrosion)
- Deviations:
- not specified
- GLP compliance:
- not specified
- Remarks:
- Study indicated to be to GLP but no test laboratory named.
Test material
- Reference substance name:
- Ethanol
- EC Number:
- 200-578-6
- EC Name:
- Ethanol
- Cas Number:
- 64-17-5
- Molecular formula:
- C2H6O
- IUPAC Name:
- ethanol
- Details on test material:
- - Analytical purity: 100% ethanol
Constituent 1
Test animals / tissue source
- Species:
- rabbit
- Strain:
- not specified
- Details on test animals or tissues and environmental conditions:
- no data
Test system
- Vehicle:
- unchanged (no vehicle)
- Controls:
- no
- Amount / concentration applied:
- Concentration: 100 % active substance
- instillation of 0.1 ml - Duration of treatment / exposure:
- single instillation
- Observation period (in vivo):
- Up to 21 days unless symptoms disappeared first.
- Number of animals or in vitro replicates:
- 3
- Details on study design:
- SCORING SYSTEM: Standard Draize grading scale for lesions.
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 1.3
- Max. score:
- 4
- Reversibility:
- fully reversible within: 4 days
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 1.66
- Max. score:
- 2
- Reversibility:
- fully reversible within: 4 days
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0.33
- Max. score:
- 1
- Reversibility:
- fully reversible within: 4 days
- Irritation parameter:
- iris score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 1
- Max. score:
- 1
- Reversibility:
- fully reversible within: 4 days
- Irritation parameter:
- iris score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0.33
- Max. score:
- 1
- Reversibility:
- fully reversible within: 4 days
- Irritation parameter:
- iris score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 0
- Reversibility:
- fully reversible within: 0 days
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 2.66
- Max. score:
- 3
- Reversibility:
- fully reversible within: 14 days
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 2.33
- Max. score:
- 3
- Reversibility:
- fully reversible within: 14 days
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 1.33
- Max. score:
- 2
- Reversibility:
- fully reversible within: 4 days
- Irritation parameter:
- chemosis score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 2
- Max. score:
- 3
- Reversibility:
- fully reversible within: 14 days
- Irritation parameter:
- chemosis score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 1.66
- Max. score:
- 2
- Reversibility:
- fully reversible within: 7 days
- Irritation parameter:
- chemosis score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0.33
- Max. score:
- 1
- Reversibility:
- fully reversible within: 4 days
- Irritation parameter:
- other: MMAS
- Basis:
- mean
- Time point:
- other: 24 hours
- Score:
- 24
- Max. score:
- 110
- Irritant / corrosive response data:
- Individual animal observations reported. Full reversal of all symptoms in animals occurred within 14 days. Most persistent effect was conjunctival redness, still present, grade 1, at 7 daysin 2 animals (last observation time before 14 day observation). One animal showed full recovery of all symptoms by day 4.
- Other effects:
- none reported.
Any other information on results incl. tables
The MMAS (modified maximum average score is calculated per animal from the 24 hour observations based corneal effects (capacity x area x 5), iris effects (x5) and conjunctival effects (redness + chemosis + discharge scores). The total possible is 80 (cornea) + iris (10) plus conjunctivae (20), ie a maximum of 110.
Average scores (all animals)
| Day 1 | Day 2 | Day 3 | |
| Corneal opacity | 1.33 | 1.33 | 0.66 |
| Iritis | 0.33 | 0.66 | 0.33 |
| Conjunctival redness | 2.66 | 2.00 | 1.66 |
| Chemosis | 1.66 | 1.66 | 0.66 |
Average scores (worst two animals)
| ANIMAL #1 (average days 1,2,3) | ANIMAL #2 (average days 1,2,3) | |
| Corneal opacity | 1.33 | 1.66 |
| Iritis | 1 | 0.33 |
| Conjunctival redness | 2.66 | 2.33 |
| Chemosis | 2 | 1.66 |
Based on the criteria for classification, only the conjunctival redness in animal one is meets the criteria for the definition of a significant occular lesions would be regarded as significant but such a response in only one animal is not regarded as sufficient for classification as an eye irritant under directive 67/548. The average results across all 3 animals are not sufficient either. However, the criteria for classification under GHS are more stringent and a positive response is seen under these criteria for corneal opacity (2 animals >1) and conjunctival redness (2 animals >2), hence classification as an eye irritant (category 2) is required.
Applicant's summary and conclusion
- Interpretation of results:
- Category 2A (irritating to eyes)
- Remarks:
- Migrated information Criteria used for interpretation of results: EU
- Conclusions:
- Substance clearly shows reversible eye irritant properties
- Executive summary:
In a reference handbook of peer reviewed, guideline GLP eye irritation study results in rabbits, ethanol was found to cause eye irritation. All symptoms reversed within 14 days. The response was not sufficiently severe to trigger classification under the criteria of directive 67/548 but was sufficient with respect to the corneal and conjunctival effects to trigger classification as a reversible eye irritant (category 2) under the EU GHS regulation.
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