Registration Dossier
Registration Dossier
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EC number: 202-855-7 | CAS number: 100-47-0
Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1978
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 978
- Report date:
- 1978
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The test material was used to treat six rabbits each on the intact skin and the abraded skin.
Further details on the method are not available. - GLP compliance:
- not specified
Test material
- Reference substance name:
- Benzonitrile
- EC Number:
- 202-855-7
- EC Name:
- Benzonitrile
- Cas Number:
- 100-47-0
- Molecular formula:
- C7H5N
- IUPAC Name:
- benzonitrile
- Reference substance name:
- Toluene
- EC Number:
- 203-625-9
- EC Name:
- Toluene
- Cas Number:
- 108-88-3
- Molecular formula:
- C7H8
- IUPAC Name:
- toluene
- Reference substance name:
- Benzaldehyde
- EC Number:
- 202-860-4
- EC Name:
- Benzaldehyde
- Cas Number:
- 100-52-7
- Molecular formula:
- C7H6O
- IUPAC Name:
- benzaldehyde
- Reference substance name:
- Terephthalonitrile
- EC Number:
- 210-783-2
- EC Name:
- Terephthalonitrile
- Cas Number:
- 623-26-7
- Molecular formula:
- C8H4N2
- IUPAC Name:
- terephthalonitrile
- Reference substance name:
- Benzene-1,3-dicarbonitrile
- EC Number:
- 210-933-7
- EC Name:
- Benzene-1,3-dicarbonitrile
- Cas Number:
- 626-17-5
- Molecular formula:
- C8H4N2
- IUPAC Name:
- isophthalonitrile
- Reference substance name:
- Water
- EC Number:
- 231-791-2
- EC Name:
- Water
- Cas Number:
- 7732-18-5
- Molecular formula:
- H2O
- IUPAC Name:
- water
- Test material form:
- liquid
Constituent 1
impurity 1
impurity 2
impurity 3
impurity 4
impurity 5
Test animals
- Species:
- rabbit
- Strain:
- New Zealand White
Test system
- Type of coverage:
- occlusive
- Preparation of test site:
- other: abraded and intact skin
- Vehicle:
- unchanged (no vehicle)
- Controls:
- no
- Duration of treatment / exposure:
- 24 h (0.5 ml)
- Observation period:
- first reading after the 24 h exposure, a second after 48 h (72 h after application)
- Number of animals:
- 6 adults
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- erythema score
- Remarks:
- intact skin
- Basis:
- mean
- Time point:
- 24/48/72 h
- Score:
- > 0.2 - <= 0.3
- Max. score:
- 1
- Reversibility:
- fully reversible within: 7 d
- Remarks on result:
- probability of weak irritation
- Irritation parameter:
- edema score
- Remarks:
- intact skin
- Basis:
- mean
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 0
- Reversibility:
- not specified
- Remarks on result:
- no indication of irritation
- Irritation parameter:
- erythema score
- Remarks:
- abraded skin
- Basis:
- mean
- Time point:
- 24/48/72 h
- Score:
- > 1 - <= 1.3
- Max. score:
- 2
- Reversibility:
- fully reversible within: 7 d
- Remarks on result:
- probability of weak irritation
- Irritation parameter:
- edema score
- Remarks:
- abraded skin
- Basis:
- mean
- Time point:
- 24/48/72 h
- Score:
- > 0 - <= 0.2
- Max. score:
- 1
- Reversibility:
- fully reversible within: 7 d
- Remarks on result:
- probability of weak irritation
Any other information on results incl. tables
Irritation was scored by the method of Draize (J.Pharacol.82 (1944) 377-390).
The second reading is carried out on the basis of the CIVO –grading system.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Remarks:
- Criteria used for interpretation of results: other: CIVO grading system
- Conclusions:
- Benzonitrile is a slight skin irritant
- Executive summary:
In a primary dermal irritation study 12 adult rabbits were exposed to 0,5 ml of benzonitrile for 24 hours to a 1 inch x 1 inch of body surface area. Animals then were observed for 2 days (48 hr). Irritation was scored by the method of Draize (J.Pharacol.82 (1944) 377- 390).
Since the Draize grading system does not comprise a 72h reading the second reading is carried out on the basis of the CIVO- grading system. Benzonitrile caused very slight erythema in two out of six rabbits treated on the intact skin. On the abraded skin it caused very slight or well- defined erythema in five out of six rabbits and very slight edema in one out of six rabbits. The average results suggest benzonitrile to be a very slight primary skin irritant.
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