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EC number: 232-444-8 | CAS number: 8030-55-5 Extractives and their physically modified derivatives. It consists primarily of resins, essential oils, and usually cinnamic and benzoic acids. (Dipterocarpus, Dipterocarpaceae).
- 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 irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 05-09-2016 to 12-09-2016
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)
- Version / remarks:
- 2015
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.46 (In Vitro Skin Irritation: Reconstructed Human Epidermis Model Test)
- Version / remarks:
- 2012
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Balsams, gurjun
- EC Number:
- 232-444-8
- EC Name:
- Balsams, gurjun
- Cas Number:
- 8030-55-5
- IUPAC Name:
- Essential oil of Gurjun obtained from the resin tapped from Dipterocarpus trees (Dipterocarpaceae) by steam distillation (Copaene quality)
- Test material form:
- liquid
- Remarks:
- Clear colourless to pale yellow liquid
- Details on test material:
- - Name of test material (as cited in study report): Gurjun Balsam oil
- Substance type: pure substance
- Physical state: liquid
- Analytical purity: no data
- Lot/batch No.: confidential information
Constituent 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Test item: 207786/A
- Source and lot/batch No.of test material:L4285828
- Expiration date of the lot/batch:30 April 2018 (retest date)
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material:At room temperature protected from light
OTHER SPECIFICS: UVCB
In vitro test system
- Test system:
- human skin model
- Source species:
- human
- Cell type:
- other: epidermal keratinocytes
- Cell source:
- other: SkinEthic Laboratories, Lyon, France
- Source strain:
- other: Not applicable
- Vehicle:
- unchanged (no vehicle)
- Details on test system:
- RECONSTRUCTED HUMAN EPIDERMIS (RHE) TISSUE
- Model used: EPISKIN Small ModelTM
- Tissue batch number: 16-EKIN-036
- Production / shipping / delivery date: No data
- Date of initiation of testing: 5 September 2016
PRE-TEST PROCEDURE:
- Pre-incubation: On day of receipt the tissues were transferred to 12-well plates and preincubated with prewarmed maintenance medium for approximately 22 hours at 37°C.
- Test item colour interference: To assess colour interference, 10 μL of testing material was added to 90 μL Milli-Q water. The mixture was mixed for approximately 15 minutes. A negative control, 10 μL Milli-Q water was tested concurrently. At the end of the shaking period a colour check was performed.
- Test item MTT reduction: To assess the ability of the test item to reduce MTT, 25 μL of the test item was added to 2 mL MTT solution (0.3 mg/mL in PBS). The mixture was incubated for 3 hours at 37°C. A negative control, sterile Milli-Q water was tested concurrently. At the end of the incubation period a colour
check was performed.
TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during exposure: Room temperature
- Temperature used during treatment / post-treatment incubation: 36.1 - 37.1 °C
RREMOVAL OF TEST MATERIAL AND CONTROLS
Tissues were washed with phosphate buffered saline to remove residual test item.
MTT DYE USED TO MEASURE TISSUE VIABILITY AFTER TREATMENT / EXPOSURE
- MTT concentration: 0.3 mg/ml in PBS
- Incubation time: 3 hours at 37 °C
- Spectrophotometer: TECAN Infinite® M200 Pro Plate Reader
- Wavelength: 570 nm
- Filter: No data
- Linear OD range of spectrophotometer: No data
DECISION CRITERIA
- A test substance is considered irritant in the skin irritation test if: The relative mean tissue viability of three individual tissues after 15 minutes of exposure to the test substance and 42 hours of post incubat ion is ≤ 50% of the mean viability of the negative controls.
- A test substance is considered non-irritant in the in vitro skin irritation test if: The relative mean tissue viability of three individual tissues after 15 minutes of exposure to the test substance and 42 hours of post incubation is > 50% of the mean viability of the negative controls. - Control samples:
- yes, concurrent negative control
- yes, concurrent positive control
- Amount/concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 25μl
NEGATIVE CONTROL
- Amount(s) applied (volume or weight): 25μl (aq)Phosphate buffered saline (PBS, Merck KGaA, Darms tadt, Germany).
POSITIVE CONTROL
- Amount(s) applied (volume or weight): 25μl Sodium dodecyl sulphate (SDS, Sigma, Steinheim, Germany) [CAS Number 151-21-3] in PBS
- Concentration (if solution): 5% (aq) - Duration of treatment / exposure:
- 15 ± 0.5 minutes (the positive control was re-spread after 7 minutes contact time).
- Duration of post-treatment incubation (if applicable):
- After rinsing with PBS tissues were moved to a new well with 2 ml pre-warmed maintenance medium and incubated for 42 hours at 37°C. After exposure and incubation, tissues were dried and transferred to 2 ml MTT-solution (0.3 mg/ml in P BS). The tissues were incubated for 3 h at 37°C. Epidermis was separated from the collagen matrix a nd both parts were placed in prelabeled microtubes and extracted with 500 μl isopropanol (Merck, Da rmstadt, Germany). Tubes were stored refrigerated and protected from light for 71 hours.
- Number of replicates:
- 3
Results and discussion
In vitro
Results
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- Relative mean tissue viability compared to the negative control tissues (100%)
- Value:
- 97
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Remarks:
- 100
- Positive controls validity:
- valid
- Remarks:
- 5.3
- Remarks on result:
- no indication of irritation
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Direct-MTT reduction: No colour changes observed
- Colour interference with MTT: Not colour changes observed
DEMONSTRATION OF TECHNICAL PROFICIENCY: No data
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: The absolute mean OD570 of the negative control tissues was within the laboratory historical control data range.
- Acceptance criteria met for positive control: The positive control had a mean cell viability of 5.3% after 15 ± 0.5 minutes exposure.
- Acceptance criteria met for variability between replicate measurements: The standard deviation value of the percentage viability of three tissues treated identically was 11% or less, indicating that the test system functioned properly. The standard deviation value of the percentage viability of the three tissues treated with GURJUN BALSAM OIL was 30%. The individual results of the percentage viability of these tissues were 107, 120 and 63%. Since these were all above 50% and therefore clearly negative, this does not influence the study outcome.
Applicant's summary and conclusion
- Interpretation of results:
- other: not classified
- Remarks:
- based on CLP criteria
- Conclusions:
- Under the conditons of this test, the relative mean tissue viability for the test item determined to be 97%. Based on this result, the substance is considered to be non-irritant and does not need to be classified for skin irritation in accordance with the criteria outlined in Annex I of CLP (1272/2008/EC).
- Executive summary:
The possible skin irritation potential of Gurjun balsam oil was tested in vitro using a human skin model through topical application for 15 minutes. The study procedures described in this report were according to OECD TG 439 guideline and GLP principles. Skin tissue was treated by topical application of 25 μL undiluted test substance. After 42 hours incubation period, determination of the cytotoxic (irritancy) effect was performed. Cytotoxicity is expressed as the reduction of mitochondrial dehydrogenase activity measured by formazan production from (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide) MTT at the end of treatment.
Skin irritation is expressed as the remaining cell viability after exposure to the test substance. Reliable negative and positive controls were included. The positive control had a mean cell viability of 53% after 15
minutes exposure. The standard deviation value of the percentage viability of three tissues treated identically was less than 11%, except for The standard deviation of the viability of the test item treated tissues was 30% which is above acceptance criteria. Since all individual viabilities were >50% the outcome was clearly negative, this does not influence the outcome of the test.
The relative mean tissue viability obtained after 15 minutes treatment with the substance compared to the negative control tissue was 97%. Based on this result, the substance is considered to be non-irritant and does not need to be classified for skin irritation in accordance with the criteria outlined in Annex I of CLP (1272/2008/EC).
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