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EC number: 229-388-1 | CAS number: 6505-28-8
Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2011-10-11 to 2011-11-11
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
- Report date:
- 2012
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
- Version / remarks:
- (2002)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)
- Version / remarks:
- (2008)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Harlan Laboratories Ltd, Shard low Business Park, Shardlow, Derbyshire, DE72 2GD, UK
Test material
- Reference substance name:
- 2,2'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-oxo-N-phenylbutyramide]
- EC Number:
- 229-388-1
- EC Name:
- 2,2'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-oxo-N-phenylbutyramide]
- Cas Number:
- 6505-28-8
- Molecular formula:
- C34H32N6O6
- IUPAC Name:
- 2,2'-[(3,3'-dimethoxybiphenyl-4,4'-diyl)didiazene-2,1-diyl]bis(3-oxo-N-phenylbutanamide)
- Test material form:
- solid: particulate/powder
- Details on test material:
- - Name of test material (as cited in study report): C.I. Pigment Orange 16
- Physical state: orange coloured powder
- Storage condition of test material: approximately 4 °C in the dark
Constituent 1
- Specific details on test material used for the study:
- - Name of test material (as cited in study report): C.I. Pigment Orange 16
- Physical state: orange coloured powder
- Analytical purity: 94.9 %
- Expiration date of the lot: 01 July 2016
- Storage condition of test material: approximately 4 °C in the dark
Test animals
- Species:
- rabbit
- Strain:
- New Zealand White
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Harlan Laboratories UK Ltd., Leicestershire, UK
- Age at study initiation: 12 weeks
- Weight at study initiation: 2.15 to 2.48 kg
- Housing: individually in suspended cages
- Diet: ad libitum (2930 Teklad Global Rabbit diet supplied by Harlan Laboratories UK Ltd., Oxon, UK)
- Water: ad libitum (tap water)
- Acclimation period: at least five days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 17 - 23
- Humidity (%): 30 -70
- Air changes (per hr): 15
- Photoperiod (hrs dark / hrs light): 12/12
Test system
- Type of coverage:
- semiocclusive
- Preparation of test site:
- clipped
- Vehicle:
- water
- Controls:
- other: Untreated skin served as control.
- Amount / concentration applied:
- TEST MATERIAL
- Amount applied: 0.5 g
VEHICLE
- Amount applied: 0.5 mL - Duration of treatment / exposure:
- 4 hours
- Observation period:
- 72 hours
- Number of animals:
- 3
- Details on study design:
- TEST SITE
- Area of exposure: Three suitable sites were selected on the back of the rabbit.
- Type of wrap if used: surgical adhesive tape
REMOVAL OF TEST SUBSTANCE
- Washing: yes, with cotton wool soaked with distilled water
- Time after start of exposure:
SCORING SYSTEM: The test item was classified according to the scheme devised by Draize J H (1959) "Dermal Toxicity" In: Appraisal of the Safety of Chemicals in Foods, Drugs and Cosmetics. Association of Food and Drug Officials of the United States, Austin, Texas, p.46-59:
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- erythema score
- Basis:
- mean
- Time point:
- other: 24, 48, 72 hours
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- edema score
- Basis:
- mean
- Time point:
- other: 24, 48, 72 hours
- Score:
- 0
- Max. score:
- 4
- Irritant / corrosive response data:
- No evidence of skin irritation was noted during the study.
- Other effects:
- Orange coloured staining, not precluding evaluation of skin responses, was noted at all treated skin sites throughout the study.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
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