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EC number: 258-649-2 | CAS number: 53585-53-8
- 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
Eye irritation
Administrative data
- Endpoint:
- eye irritation: in vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 21 to 24 April 1981
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 981
- Report date:
- 1981
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: ETAD (Ecological and Toxicological of the Dyestuffs Manufacturing Industry) Method n°003
- Deviations:
- yes
- Remarks:
- some parameters, like the age of animals at study initiation, were not reported. Only the 24- and 72-h examination were performed (the 48-h examination was lacking).
- Principles of method if other than guideline:
- Method: other: ETAD (Ecological and Toxicological of the Dyestuffs Manufacturing Industry) Method n°003
- GLP compliance:
- yes
Test material
- Reference substance name:
- Dibenzylbenzene, ar-methyl derivative
- EC Number:
- 258-649-2
- EC Name:
- Dibenzylbenzene, ar-methyl derivative
- Cas Number:
- 53585-53-8
- Molecular formula:
- C21H20
- IUPAC Name:
- dibenzylbenzene, ar-methyl derivative
Constituent 1
Test animals / tissue source
- Species:
- rabbit
- Strain:
- other: New-Zealand
- Details on test animals or tissues and environmental conditions:
- TEST ANIMALS
- Source: Charles River, France
- Age at study initiation: not reported
- Weight at study initiation: 2 - 2.5 kg
- Housing: individually in polystyrene cage (0.55 mm x 0.35 mm x 0.32 mm)
- Diet (e.g. ad libitum): commercial diet
- Water (e.g. ad libitum): ad libitum in 1500- or 2000-mL feeding bottle
- Acclimation period: at least 8 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 17-23
- Humidity (%): 50 +/- 20
- Air changes (per hr): 8
- Photoperiod (hrs dark / hrs light): 12
IN-LIFE DATES: From: 21 April To: 24 April 1981
Test system
- Vehicle:
- unchanged (no vehicle)
- Controls:
- no
- Amount / concentration applied:
- undiluted
Amount applied: 0.1 ml - Duration of treatment / exposure:
- The eyes were not rinsed after administration of the test substance
- Observation period (in vivo):
- 72 hours
- Number of animals or in vitro replicates:
- 6
- Details on study design:
- REMOVAL OF TEST SUBSTANCE
- Washing: no
- SCORING SYSTEM: treated eyes were scored for conjunctival lesions and discharge, iris lesions and corneal lesions.
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #4
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #5
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #6
- Time point:
- 24/48/72 h
- Score:
- 0.67
- Max. score:
- 4
- Reversibility:
- fully reversible within: 72 hours
- Irritation parameter:
- iris score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 2
- Irritation parameter:
- iris score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 2
- Irritation parameter:
- iris score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 2
- Irritation parameter:
- iris score
- Basis:
- animal #4
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 2
- Irritation parameter:
- iris score
- Basis:
- animal #5
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 2
- Irritation parameter:
- iris score
- Basis:
- animal #6
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 2
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 3
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 3
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0.33
- Max. score:
- 3
- Reversibility:
- fully reversible within: 48 hours
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #4
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 3
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #5
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 3
- Irritation parameter:
- conjunctivae score
- Basis:
- animal #6
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 3
- Irritation parameter:
- chemosis score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- chemosis score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- chemosis score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- chemosis score
- Basis:
- animal #4
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- chemosis score
- Basis:
- animal #5
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritation parameter:
- chemosis score
- Basis:
- animal #6
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Irritant / corrosive response data:
- not irritating
- Other effects:
- No clinical signs were mentioned.
Any other information on results incl. tables
- Iris was unaffected at any observation time.
- Corneal opacity was noted in one rabbit 24h after instillation. It persisted at 48h but vanished at 72h.
- Conjunctival findings: Redness was observed in all rabbits 1h after instillation (two had a score of 1 and four had a score of 2). At 24h, only one animal still presented a score 1 redness. Afterwards, it was no more observed.
- A grade 2 chemosis was present in 3 animals at 1h. It retroceded and was absent at 24h.
- An important discharge (grade 3) was observed in one rabbit, 3 exhibited a moderate discharge (grade 2) and another one had a slight discharge (grade 1). No discharge were found any more thereafter
- CLINICAL FINDINGS: No observed effects
- MORTALITY: No deaths occurred.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Based on the results of this eye irritation study, the substance should not be classified as irritating to eyes according to the criteria for classification laid down in Directive 67/548/EEC.
- Executive summary:
The eye irritation potential of the substance was determined in rabbits according to method No. 003 of ETAD (Ecological and toxicological of the Dyestuffs manufacturing Industry) from 1976.
A single application of 0.1 ml of dibenzyltoluene in its original form was placed into the cunjonctival sac of the eye of six male New-Zealand rabbits. The eye was not rinsed after instillation of the test substance. The ocular reactions were observed one hour, 24, 48 and 72 hours after the instillation.
A few ocular reactions (conjunctival chemosis and enanthema) were observed among the animals however these findings were slight (maximum score of 1) and totally reversible within 48 -72h . Thus, the substance should not be classified as irritating to eyes according to the criteria for classification laid down in Directive 67/548/EEC.
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