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EC number: 423-070-8 | CAS number: 58890-25-8
- 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
Acute Toxicity: dermal
Administrative data
- Endpoint:
- acute toxicity: dermal
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 20 October, 1994 - 03 November, 1994
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: The study has been performed according to OECD and/or EC guidelines and according to GLP principles.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 995
- Report date:
- 1995
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 402 (Acute Dermal Toxicity)
- Version / remarks:
- (1987)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.3 (Acute Toxicity (Dermal))
- Version / remarks:
- (1992)
- Deviations:
- no
- GLP compliance:
- yes
- Test type:
- standard acute method
- Limit test:
- yes
Test material
- Reference substance name:
- -
- EC Number:
- 423-070-8
- EC Name:
- -
- Cas Number:
- 58890-25-8
- Molecular formula:
- not applicable (reaction mass)
- IUPAC Name:
- 3-cyclohexyl-1-[4-({4-[(cyclohexylcarbamoyl)amino]phenyl}methyl)phenyl]urea; 3-cyclohexyl-1-[4-({4-[(phenylcarbamoyl)amino]phenyl}methyl)phenyl]urea; 3-phenyl-1-[4-({4-[(phenylcarbamoyl)amino]phenyl}methyl)phenyl]urea
- Test material form:
- solid: particulate/powder
- Remarks:
- migrated information: powder
- Details on test material:
- - Name of test material (as cited in study report): KY-RB
- Description: White powder
Constituent 1
Test animals
- Species:
- rat
- Strain:
- Wistar
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: BRL Ltd., Basel, Switzerland
- Age at study initiation: Approx. 10 weeks
- Weight at study initiation: males: 253 - 323 g; females: 191 - 221 g
- Housing: Individually housed in labelled polycarbonate cages.
- Diet: Free access to standard pelleted laboratory animal diet (Kliba 343 from Klingentalmühle AG, Kaiseraugst, Switzerland)
- Water: Free access to tap-water
- Acclimation period: At least 5 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 21
- Humidity (%): 50
- Air changes (per hr): approx. 15
- Photoperiod (hrs dark / hrs light): 12/12
Administration / exposure
- Type of coverage:
- occlusive
- Details on dermal exposure:
- One day before exposure (Day -1) an area of approximately 5x7 cm on the back of the animal was clipped.
The formulation was applied to an area of approx. 25 cm² (5x5 cm) for males and 18 cm² (3.5x5 cm) for females by application on a gauze patch fixed successively to aluminium foil and flexible bandage, with drops of petrolatum.
Frequency: Single dosage, on Day 1.
Washing: Following application, dressings were removed and the skin cleaned of residual test substance using a tissue moistened with tap water. - Duration of exposure:
- 24 hours.
- Doses:
- 2000 mg/kg body weight
- No. of animals per sex per dose:
- 5
- Control animals:
- no
- Details on study design:
- VEHICLE
- Justification for choice of vehicle: The vehicle was selected based on trial formulations performed at NOTOX and on test substance data supplied by the sponsor.
Dose volume: 10 mL/kg body weight
DOSAGE PREPARATION: Formulation was prepared immediately prior to dosing. The test substance was prepared in propylene glycol and adjustment was made for the specific gravity of propylene glycol (1.036). Homogeneity was accomplished to a visually acceptable level.
Duration of observation period following administration: 14 days
- Frequency of observations and weighing:
Mortality/Viability: Twice daily. The time of death was recorded as precisely as possible.
Body weights: Days 1 (pre-administration), 8 and 15 and at death
Clinical signs: At periodic intervals on the day of treatment (Day 1) and once daily thereafter, until Day 15.
- Necropsy of survivors performed: All animals assigned to the study were subjected to necropsy and descriptions of all macroscopic abnormalities recorded.
- Other examinations performed: none. - Statistics:
- None.
Results and discussion
Effect levels
- Sex:
- male/female
- Dose descriptor:
- LD50
- Effect level:
- > 2 000 mg/kg bw
- Based on:
- test mat.
- Mortality:
- One male was found dead early in the morning of day 2. No further mortality occurred during the observation period (15 days).
- Clinical signs:
- other: Lethargy was noted among the males and females on days 1 and/or 2.
- Gross pathology:
- Macroscopic post mortem examination of the animal that died during the study revealed fluid contents in the abdominal cavity.
Macroscopic post mortem examination of the surviving animals at termination did not reveal any abnormalities. - Other findings:
- White staining of the treated skin, caused by the test substance, was noted in all animals after bandage removal on day 2 and had disappeared within the next 24 hours.
Erythema was seen in the treated skin-area in one female on day 4.
Applicant's summary and conclusion
- Interpretation of results:
- not classified
- Remarks:
- Migrated information Criteria used for interpretation of results: EU
- Conclusions:
- In an acute dermal toxicity study with KY-RB with rats, performed according to OECD 402 test guideline and GLP principles, an LD50 >2000 mg/kg bw was determined.
- Executive summary:
KY-RB was tested in an acute dermal toxicity study with male and female rats, performed according to OECD 402 test guideline and GLP principles. One male was found dead early in the morning of day 2. No further mortality occurred during the observation period (15 days). Lethargy was noted among the males and females on days 1 and/or 2. Erythema was seen in the treated skin-area in one female on day 4. Macroscopic post mortem examination of the animal that died during the study revealed fluid contents in the abdominal cavity. Macroscopic post mortem examination of the surviving animals at termination did not reveal any abnormalities.
Based on the results an LD50 >2000 mg/kg bw was determined and KY-RB does not have to be classified for acute dermal toxicity according to Regulation (EC) No 1272/2008.
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