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Registration Dossier
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Diss Factsheets
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EC number: 202-112-7 | CAS number: 91-97-4
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
![](https://echa.europa.eu./o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1997-11-19 to 1997-12-1
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 998
- Report date:
- 1998
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
- Version / remarks:
- 1992
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)
- Version / remarks:
- 1992
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 3,3'-dimethylbiphenyl-4,4'-diyl diisocyanate
- EC Number:
- 202-112-7
- EC Name:
- 3,3'-dimethylbiphenyl-4,4'-diyl diisocyanate
- Cas Number:
- 91-97-4
- Molecular formula:
- C16H12N2O2
- IUPAC Name:
- 3,3'-dimethylbiphenyl-4,4'-diyl diisocyanate
- Test material form:
- solid
1
Test animals
- Species:
- rabbit
- Strain:
- New Zealand White
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: David Percival Ltd, Moston, Sandbach, Chesire, UK
- Age at study initiation: twelve to sixteen weeks
- Weight at study initiation: 2.51 to 2.70 kg
- Housing: individually in supended metal cages
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: five days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18 to 20
- Humidity (%): 50 to 65
- Air changes (per hr): 15
- Photoperiod (hrs dark / hrs light): 12/12
Test system
- Type of coverage:
- semiocclusive
- Preparation of test site:
- abraded
- Vehicle:
- water
- Controls:
- not required
- Amount / concentration applied:
- TEST MATERIAL
- Amount applied: 0.5 g
VEHICLE
- Amount applied: 0.5 mL - Duration of treatment / exposure:
- 3 minutes, 1 hour and 4 hours
- Observation period:
- 1, 24, 48 and 72 hours following the removal of the patches
- Number of animals:
- Three (one female, two males)
- Details on study design:
- TEST SITE
- Area of exposure: 2.5 cm x 2.5 cm
- Type of wrap: a strip of surgical adhesive tape (BLENDERM: approximate size 2.5 cm x 4.0 cm); the trunk was wrapped in a elasticated corset (TURBIGRIP)
REMOVAL OF TEST SUBSTANCE
- Washing: swabbing with cotton wool soaked in distilled water
- Time after start of exposure: 3 minute, 1 hour and 4 hours
OBSERVATION TIME POINTS
1 hour following the removal of patches, and 24, 48 and 72 hours later
SCORING SYSTEM:
- Method of calculation: Draize scoring system (1977)
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- erythema score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- erythema score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- erythema score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- edema score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- edema score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- edema score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritant / corrosive response data:
- 4-hour exposure period:
No erythema/eschar and oedema observed at observation times >= 24 h. All treated skin sites appeared normal at the 24-hour observation. Very slight erythema (individual score of 1) and very slight oedema (individual score of 1) were noted at two treated skin sites at the 1-hour observation. This effect was fully reversible within 24 hours. No corrosive effects were noted.
3-minute and 1-hour exposure period:
No evidence of skin irritation was noted during the study. No corrosive effects were noted. - Other effects:
- None
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The test material, TODI, is considerd to be not irritating to rabbit skin according to the Draize classification scheme. No corrosive effects were noted.
- Executive summary:
A study was performed to assess the irritancy potential of the test material to the skin of the New Zealand White rabbit. The method used followed the recommendations of the OECD Guidelines for Testing of Chemicals No. 404.
A single 4 -hour, semi-occluded application of the test material to the intact skin of three rabbits produces very slight erythema and very slight oedema at two treated skin sites. All treated skin sites appreared normal at the 24 -, 48- and 72-hour observations. No corrosive effects were noted. 3 -minute and 1 -hour semi-occluded applications of the test material to the intact skin of one rabbit procued no corrosive effects. According to the results, the test material has no irritation and no corrosion potential.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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