Registration Dossier
Registration Dossier
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EC number: 613-895-3 | CAS number: 6609-57-0
Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- April 2000
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 000
- Report date:
- 2000
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)
- Deviations:
- no
- GLP compliance:
- yes
Test material
- Reference substance name:
- 2-ethoxybenzonitrile
- EC Number:
- 613-895-3
- Cas Number:
- 6609-57-0
- Molecular formula:
- C9 H9 N O
- IUPAC Name:
- 2-ethoxybenzonitrile
Constituent 1
Test animals
- Species:
- rabbit
- Strain:
- Himalayan
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Sex: male
- Source: LPT Laboratory of Pharmacology and Toxicology KG, 24601 Löhndorf, Germany
- Age at study initiation: approx. 6 months
- Weight at study initiation: 2.9 kg
- Housing: individual
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: at least 20 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 +/- 3
- Humidity (%): 50 +/- 20
- Photoperiod (hrs dark / hrs light): 12 / 12
Test system
- Type of coverage:
- semiocclusive
- Preparation of test site:
- shaved
- Vehicle:
- unchanged (no vehicle)
- Controls:
- other: the surrounding untreated skin served as control
- Amount / concentration applied:
- 0.5 mL
- Duration of treatment / exposure:
- 4 hours
- Observation period:
- 1, 24, 48 and 72 hours after patch removal
- Number of animals:
- 3
- Details on study design:
- TEST SITE
- Area of exposure: approx. 6 cm²
- Type of wrap if used: gauze patch, non-irritating tape
REMOVAL OF TEST SUBSTANCE
- Washing: no residual test item had to be removed
- Time after start of exposure: 4 hours
SCORING SYSTEM: according to DRAIZE
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- erythema score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 0.7
- Max. score:
- 4
- Reversibility:
- fully reversible within: 4 days
- Remarks on result:
- other: mean score after 72 hours: 0.7
- Irritation parameter:
- erythema score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 1
- Max. score:
- 4
- Reversibility:
- fully reversible within: 6 days
- Remarks on result:
- other: mean score after 72 hours: 1.0
- Irritation parameter:
- erythema score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 1
- Max. score:
- 4
- Reversibility:
- fully reversible within: 7 days
- Remarks on result:
- other: mean score after 72 hours: 1.0
- Irritation parameter:
- edema score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: not applicable
- Remarks on result:
- no indication of irritation
- Irritation parameter:
- edema score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: not applicable
- Remarks on result:
- no indication of irritation
- Irritation parameter:
- edema score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: not applicable
- Other effects:
- No systemic intolerance reactions were observed.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Executive summary:
In a dermal irritation study according to OECD TG 404 Ethoxybenzonitril was applied under semiocclusive dressings for 4 hours to the shaved skin of 3 male rabbits. Skin irritation was assessed after 1, 24, 48 and 72 hours using the Draize scale. The mean irritation index for erythema was 0.9 of max. 4 (0.7 -1.0), the mean irritation index for edema was 0.0 of max 4. Signs were fully reversible in all animals within 7 days. The weight of these evidences indicates that the test substance may be considered as "slightly irritating to the skin". No systemic intolerance reactions were observed.
According to classification criteria Ethoxybenzonitril is not an irritant to the skin.
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