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EC number: - | CAS number: 2156592-70-8
- 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
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Skin sensitisation
Administrative data
- Endpoint:
- skin sensitisation: in vivo (LLNA)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 03 May 2010 to 19 August 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay)
- GLP compliance:
- yes (incl. QA statement)
- Type of study:
- mouse local lymph node assay (LLNA)
Test material
- Reference substance name:
- Benzene, mono-C11-C13-branched alkyl derivatives
- Cas Number:
- 2156592-70-8
- Molecular formula:
- Main component may be represented by formula C18H30
- IUPAC Name:
- Benzene, mono-C11-C13-branched alkyl derivatives
- Details on test material:
- - Name of test material (as cited in study report): BAB
- Substance type: UVCB
- Physical state: colorless liquid
- Purity test date: 22/12/98
- Lot/batch No.: 981204
- Expiration date of the lot/batch: 23 December 2014
- Storage condition of test material: at room temperature
Constituent 1
In vivo test system
Test animals
- Species:
- mouse
- Strain:
- CBA
- Sex:
- female
- Details on test animals and environmental conditions:
- TEST ANIMALS
- Source: Breeder Janvier, Le Genest-Saint-Isle, France
- Age at study initiation: 10 weeks old
- Weight at study initiation: mean body weight standard deviation of 21.6 1.2 g
- Housing: disposable crystal polystyrene cages
- Diet (e.g. ad libitum): SSNIFF R/M-H pelleted maintenance diet
- Water (e.g. ad libitum): tap water (filtered using a 0.22 micron filter)
- Acclimation period: at least 5 days before the beginning of the study
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 ± 2°C
- Humidity (%): 30 to 70%
- Air changes (per hr): 12 cycles/hour
- Photoperiod (hrs dark / hrs light): 12h/12h
IN-LIFE DATES: From 05 May 2010 to 25 May 2010
Study design: in vivo (LLNA)
- Vehicle:
- acetone/olive oil (4:1 v/v)
- Concentration:
- 1, 2.5, 5, 10 and 25%
- No. of animals per dose:
- 4 animals per dose
- Details on study design:
- RANGE FINDING TESTS:
- Compound solubility: the test item was soluble in the first recommended vehicle, acetone/olive oil (4/1, v/v). A solution was obtained at the maximum tested concentration of 50%
- Irritation: Erythema and dryness of the skin of the ears were noted at the concentration of 100% on days 3 and 6, associated with crusts on day 6. Dryness of the skin of the ears and crusts were also noted at the concentration of 50% on day 6. An increase in ear thickness was recorded at the concentrations of 50% and 100%, showing the irritant potential of the test item at these concentrations. The highest concentration retained for the main test was therefore 25%.
MAIN STUDY
ANIMAL ASSIGNMENT AND TREATMENT
- Name of test method: study based on design adopted by ICCVAM (Interagency Coordination Committee on the Validation of Alternative Methods, ICCVAM 1999) and ECETOC (Monograph No. 78 Skin sensitization Testing for the Purpose of Hazard Identification and Risk Assessment, September 2000), with the addition of the evaluation of local irritation
- Criteria used to consider a positive response: Stimulation Indice (SI) > or = 3
TREATMENT PREPARATION AND ADMINISTRATION:
Treatment preparation: The test item was prepared at the chosen concentrations in Acetone/olive oil by successive dilutions. The dosage form preparations were homogenized by vortex.
Administration: On days 1, 2 and 3, a dose-volume of 25 µL of the control or dosage form preparations was applied to the dorsal surface of both ears, using an adjustable pipette fitted with a plastic tip. In order to avoid licking and to ensure an optimized application of the test materials, the animals were placed under light isoflurane anesthezia during the administration. No massage was performed but the tip was used to spread the preparation over the application sites. No rinsing was performed between each application. - Positive control substance(s):
- hexyl cinnamic aldehyde (CAS No 101-86-0)
Results and discussion
- Positive control results:
- The threshold positive value of 3 for the SI was reached in the positive control group (SI = 14.09)
In vivo (LLNA)
Resultsopen allclose all
- Parameter:
- SI
- Test group / Remarks:
- Group 1, vehicle
- Remarks on result:
- not measured/tested
- Parameter:
- SI
- Value:
- 1.64
- Test group / Remarks:
- Group 2: Test item at 1%
- Parameter:
- SI
- Value:
- 1.3
- Test group / Remarks:
- Group 3 Test item at 2.5%
- Parameter:
- SI
- Value:
- 1.79
- Test group / Remarks:
- Group 4, Test item at 5%
- Parameter:
- SI
- Value:
- 1.42
- Test group / Remarks:
- Group 5, Test item at 10%
- Parameter:
- SI
- Value:
- 2.38
- Test group / Remarks:
- Group 6, Test item at 25%
- Parameter:
- SI
- Value:
- 14.09
- Test group / Remarks:
- Group 7 HCA 25%
- Parameter:
- other: disintegrations per minute (DPM)
- Remarks on result:
- other: see Remark
- Remarks:
- DPM per group: Vehicule: 557.83 Test item at 1%: 912.96 Test item at 2.5%: 727.07 Test item at 5%: 100.80 Test item at 10%: 790.66 Test item at 25%: 1329.78 HCA 25%: 5894.83 DPM per node: Vehicule: 69.73 Test item at 1%: 114.12 Test item at 2.5%: 90.88 Test item at 5%: 125.10 Test item at 10%: 98.83 Test item at 25%: 166.22 HCA 25%: 982.47
Any other information on results incl. tables
No notable lymphoproliferation was noted with the test item at any tested concentration.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Remarks:
- Migrated information
- Conclusions:
- Under the experimental conditions of this study, the test item BAB did not induce delayed contact hypersensitivity in the murine Local Lymph Node Assay.
- Executive summary:
Methods
A preliminary test was first performed in order to define the concentrations of test item to be used in the main test.
In the main test, twenty eight female CBA/J mice were allocated to seven groups:
. five treated groups of four animals receiving the test item BAB at the concentration of 1, 2.5, 5, 10 or 25% in a mixture acetone/olive oil (4/1; v/v)(vehicle),
. one negative control group of four animals receiving the vehicle,
. one positive control group of four animals receiving the reference item,alpha‑hexylcinnamaldehyde (HCA), a moderate sensitizer, at the concentration of 25% in the vehicle.
During the induction phase, the test item, vehicle or reference item was applied over the ears (25 µL per ear) for 3 consecutive days (days 1, 2 and 3). After 2 days of resting, the proliferation of lymphocytes in the lymph node draining the application site was measured by incorporation of tritiated methyl thymidine (day 6). The obtained values were used to calculate Stimulation Indices (SI).
The irritant potential of the test item was assessed in parallel by measurement of ear thickness on days 1, 2, 3 and 6.
Results
The test item was soluble in the first recommended vehicle, acetone/olive oil (4/1, v/v).A solution was obtained at the maximum tested concentration of 50%.
Consequently, the concentrations selected for the preliminary test were 10, 25, 50 and 100%.
Since the test item was irritant in the preliminary test at the concentrations of 50 and 100%, the highest tested concentration retained for the main test was 25%.
Systemic clinical signs and mortality
Neither treatment-related mortality nor clinical signs were observed during the study.
Local irritation
No cutaneous reactions and no notable increase in ear thickness were observed in the animals of the treated groups.
Proliferation assay
A significant lymphoproliferation was noted in the positive control group given HCA at 25%. The study was therefore considered valid.
No notable lymphoproliferation was noted at any tested concentration.
The results are presented in the following table:
Treatment
Concentration
(%)
Irritation level
Stimulation Index
(SI)
Test item
1
non-irritant
1.64
Test item
2.5
non-irritant
1.30
Test item
5
non-irritant
1.79
Test item
10
non-irritant
1.42
Test item
25
non-irritant
2.38
HCA
25
-
14.09
Conclusion
Under the experimental conditions of this study, the test item BAB did not induce delayed contact hypersensitivity in the murine Local Lymph Node Assay.
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