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EC number: 283-900-8 | CAS number: 84775-71-3 Extractives and their physically modified derivatives such as tinctures, concretes, absolutes, essential oils, oleoresins, terpenes, terpene-free fractions, distillates, residues, etc., obtained from Ocimum basilicum, Labiatae.
- 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
Skin sensitisation
Administrative data
- Endpoint:
- skin sensitisation: in vivo (LLNA)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 2 005
- Report date:
- 2005
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
- Version / remarks:
- The assays were conducted according to the method of Kimber et al. (1992, 1994) as formalized in OECD Guideline 429 (OECD, 2002)
- Deviations:
- no
- GLP compliance:
- not specified
- Type of study:
- mouse local lymph node assay (LLNA)
Test material
- Reference substance name:
- Ocimum basilicum, ext.
- EC Number:
- 283-900-8
- EC Name:
- Ocimum basilicum, ext.
- Cas Number:
- 84775-71-3
- Molecular formula:
- not applicable
- IUPAC Name:
- 3,7-dimethylocta-1,6-dien-3-ol
- Test material form:
- liquid
1
In vivo test system
Test animals
- Species:
- mouse
- Strain:
- CBA/Ca
- Sex:
- female
- Details on test animals and environmental conditions:
- TEST ANIMALS
- Source: Harlan Interfauna UK, Shaw's Farm, Blackthorne, Bicester, Oxon, UK
- Females (if applicable) nulliparous and non-pregnant: not specified
- Age at study initiation: 8-12 weeks
- Weight at study initiation: 17–21 g
- Housing: 4 animals per cage
- Diet (e.g. ad libitum): ad libitum (Porton Combined Diet, pelleted diet; Special Diets Services Ltd., Witham, United Kingdom)
- Water (e.g. ad libitum): ad libitum
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19–25
- Humidity (%): 30–70
- Photoperiod (hrs dark / hrs light): 12/12
Study design: in vivo (LLNA)
- Vehicle:
- other: EtOH:DEP 1:3
- Concentration:
- 2.5%, 5%, 10%, 25% or 50% w/v
- No. of animals per dose:
- 4
- Details on study design:
-
MAIN STUDY
ANIMAL ASSIGNMENT AND TREATMENT
- Name of test method: LLNA
- Criteria used to consider a positive response: For each concentration of test material, a stimulation index (SI) relative to the concurrent vehicle treated control was calculated. The SI value for each test material was calculated by dividing the mean dpm at a given dose level by the mean dpm of the vehicle control group. A material was considered a sensitizer if at least one concentration of the test material was observed to have an SI value of 3 or more.
ADMINISTRATION
- Test item: 25 µL of the test substance or vehicle control was applied to the back of the ear in 4 female mice per dose group. Dosing occurred daily for three consecutive days.
- 3H-Methyl Thymidine: on day 6 after the first application, the animals were injected intravenously (tail vein) with 250 µL phosphate buffered saline (PBS) containing 20 µCi of [3H] methyl thymidine.
TERMINATION
Five hours later, the mice were euthanized and the draining auricular lymph nodes were excised and pooled for each experimental group. Suspensions of the lymph node cells were prepared (200-mesh stainless steel gauze). The cell suspensions were washed thrice in PBS and precipitated overnight at 4 °C with 5% w/v trichloroacetic acid (TCA). The samples were pelleted by centrifugation, and resuspended in 1 ml of TCA. The incorporation of 3HTdR was measured by by scintillation counting and expressed as disintegrations per minute (dpm) per lymph node for each experimental group. - Positive control substance(s):
- not specified
- Statistics:
- The EC3 value was taken as a measure of relative sensitization potential for each material. Using two data points on the dose response curve, one immediately above and one below the SI value of three, the EC3 value was calculated utilizing the following equation presented by Basketter et al. (1999): EC3 = c+[(3-d)/(b-a)*(a-c) where the data points lying directly above and below the SI value of 3 on the dose–response curve have the coordinates (a,b) and (c,d), respectively.
Results and discussion
- Positive control results:
- Not specified
In vivo (LLNA)
Resultsopen allclose all
- Key result
- Parameter:
- EC3
- Remarks:
- %
- Value:
- < 2.5
- Variability:
- not specified
- Test group / Remarks:
- 2.5% test substance
- Parameter:
- SI
- Value:
- 3
- Variability:
- not specified
- Test group / Remarks:
- 2.5% test substance
- Parameter:
- SI
- Value:
- 3
- Variability:
- not specified
- Test group / Remarks:
- 5% test substance
- Parameter:
- SI
- Value:
- 8
- Variability:
- not specified
- Test group / Remarks:
- 10% test substance
- Parameter:
- SI
- Value:
- 17.6
- Variability:
- not specified
- Test group / Remarks:
- 25% test substance
- Parameter:
- SI
- Value:
- 25.2
- Variability:
- not specified
- Test group / Remarks:
- 50% test substance
- Cellular proliferation data / Observations:
- CELLULAR PROLIFERATION DATA
Mean DPM at 0 (vehicle), 2.5, 5, 10, 25, and 50% were 334, 1011, 1013, 2689, 5896 and 8434 respectively.
DETAILS ON STIMULATION INDEX CALCULATION
The SI value for each test material was calculated by dividing the mean dpm at a given dose level by the mean dpm of the vehicle control group.
EC3 CALCULATION
The EC3 value, or estimated concentration of test material required to elicit an SI of 3 or more, was derived from the dose–response data by linear interpolation.
Applicant's summary and conclusion
- Interpretation of results:
- other: Skin sensitiser
- Remarks:
- in accordance with EU CLP (EC 1272/2008 and its updates)
- Conclusions:
- Under the conditions of this study, the test item was considered to be a sensitiser based on a derived EC3 value of <2.5%.
- Executive summary:
The skin sensitisation potential of the test substance has been tested according to the OECD TG 429 (Local Lymph Node Assay) guideline. An amount of 25 µL of the test substance (at 2.5, 5, 10, 25 and 50%) or vehicle control was applied to the back of the ear in 4 female mice per dose group. Dosing occurred daily for three consecutive days. On day 6 after the first application, the animals were injected intravenously (tail vein) with 250 µL phosphate buffered saline (PBS) containing 20 µCi of [3H] methyl thymidine. Five hours later, the mice were euthanized and the draining auricular lymph nodes were excised and pooled for each experimental group. Suspensions of the lymph node cells were prepared (200-mesh stainless steel gauze). The cell suspensions were washed three times in PBS and precipitated overnight at 4 °C with 5% w/v trichloroacetic acid (TCA). The samples were pelleted by centrifugation, and resuspended in 1 ml of TCA. The incorporation of 3HTdR was measured by scintillation counting and expressed as disintegrations per minute (dpm) per lymph node for each experimental group. Stimulation Indices of 3, 3, 8, 17.6 and 25.2 were observed at concentrations of 2.5, 5, 10, 25 and 50% respectively. The EC3 was calculated to be <2.5% and no NOEC could be derived. Based on these results the substance is considered to be a skin sensitiser.
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