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EC number: 946-324-4 | CAS number: -
- 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:
- 24 January - 08 February 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of study:
- mouse local lymph node assay (LLNA)
Test material
- Reference substance name:
- (R)-p-mentha-1,8-diene
- EC Number:
- 227-813-5
- EC Name:
- (R)-p-mentha-1,8-diene
- Cas Number:
- 5989-27-5
- Molecular formula:
- C10H16
- IUPAC Name:
- (4R)-4-isopropenyl-1-methylcyclohexene
- Reference substance name:
- (4R)-4-(2-methoxypropan-2-yl)-1-methylcyclohexene
- Cas Number:
- 30199-25-8
- Molecular formula:
- C11H20O
- IUPAC Name:
- (4R)-4-(2-methoxypropan-2-yl)-1-methylcyclohexene
- Test material form:
- liquid
Constituent 1
Constituent 2
- Specific details on test material used for the study:
- RADIOLABELLING INFORMATION (if applicable)
- Radiochemical purity: n/a
- Specific activity: n/a
- Locations of the label: n/a
- Expiration date of radiochemical substance: n/a
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: ca. 2 - 8 ºC in the dark and under nitrogen.
- Stability under test conditions: Assumed stable
- Solubility and stability of the test substance in the solvent/vehicle: soluble in acetone: olive oil (4: 1 v/v)
- Reactivity of the test substance with the solvent/vehicle of the cell culture medium: No
TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: No
- Preliminary purification step (if any): No
- Final dilution of a dissolved solid, stock liquid or gel: No
- Final preparation of a solid: No
FORM AS APPLIED IN THE TEST (if different from that of starting material): n/a
OTHER SPECIFICS: No
In vivo test system
Test animals
- Species:
- mouse
- Strain:
- CBA/Ca
- Sex:
- female
- Details on test animals and environmental conditions:
- TEST ANIMALS
- Source: Envigo RMS B.V., Inc., Horst, The Netherlands
- Females (if applicable) nulliparous and non-pregnant: Yes
- Microbiological status of animals, when known: Not reported
- Age at study initiation: 8 - 12 weeks
- Weight at study initiation: 15 - 23 g
- Housing: The animals were housed in suspended solid floor polypropylene cages furnished with softwood woodflakes
- Diet (e.g. ad libitum): Free access to food (2014C Teklad Global Rodent diet supplied by Envigo RMS (UK) Limited, Oxon, UK)
- Water (e.g. ad libitum): Free access to mains tap water
- Acclimation period: At least 5 days
- Indication of any skin lesions: No
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19 - 25 ºC
- Humidity (%): 30 - 70 %
- Air changes (per hr): At least 15 changes/ hour
- Photoperiod (hrs dark / hrs light): 12 h: 12 h (light: dark)
- IN-LIFE DATES: Not reported
Study design: in vivo (LLNA)
- Vehicle:
- unchanged (no vehicle)
- Remarks:
- Acetone: olive oil (4: 1 v/v) was used to prepare 50 and 25 % dilutions
- Concentration:
- 100, 50 and 25 %
- No. of animals per dose:
- 5
- Details on study design:
- PRE-SCREEN TESTS:
- Compound solubility: Soluble
- Irritation: No
- Systemic toxicity: No
- Ear thickness measurements: < 25 % increase
- Erythema scores: No - Positive control substance(s):
- hexyl cinnamic aldehyde (CAS No 101-86-0)
- Statistics:
- Data was processed to give group mean values for disintegrations per minute and standard deviations where appropriate. Individual and group mean disintegrations per minute values were assessed for dose response relationships. Data was first assessed for suitability by analysis of normality and homogeneity of variance. If the assumptions that the data are both normally distributed and has homogeneity of variances, then parametric one way analysis of variance (ANOVA) and Dunnett’s multiple comparison procedure were used to determine statistical significance. If the assumptions were not met, non-parametric Kruskal-Wallis Rank Sum and Mann-Whitney U test procedures were used.
Probability values (p) are presented as follows:
P<0.001 ***
P<0.01 **
P<0.05 *
P>0.05 (not significant)
Results and discussion
- Positive control results:
- Concurrent control was within the historical control data. The positive control α-Hexylcinnamaldehyde, tech., 85% gave a Stimulation Index of greater than 3 (4.77) when tested at a concentration of 25% v/v in acetone/olive oil 4:1, thus, demonstrating the sensitivity and reliability of the test system.
In vivo (LLNA)
Resultsopen allclose all
- Key result
- Parameter:
- SI
- Value:
- 2.39
- Test group / Remarks:
- 100 %
- Parameter:
- SI
- Value:
- 2.18
- Test group / Remarks:
- 50 %
- Parameter:
- SI
- Value:
- 1.04
- Test group / Remarks:
- 25 %
- Cellular proliferation data / Observations:
- CELLULAR PROLIFERATION DATA: < 25 % at 100 % concentration.
DETAILS ON STIMULATION INDEX CALCULATION: Mean treatment group dpm / mean vehicle dpm
EC3 CALCULATION: n/a
CLINICAL OBSERVATIONS: No signs of systemic toxicity or other clinical signs
BODY WEIGHTS: Within normal limits
Any other information on results incl. tables
Table 1 Stimulation index results
Test Group |
Animal # |
Individual animal DPMa |
Mean group DPM (std. dev.) |
Stimulation index (SI) |
Solvent control (acetone: olive oil 4:1 v/v) |
1-1 |
2439.33 |
2647.93 (± 494.05) |
n/a |
1-2 |
1979.36 |
|||
1-3 |
3323.90 |
|||
1-4 |
2814.40 |
|||
1-5 |
2682.68 |
|||
100 % test item |
2-1 |
2418.63 |
2765.62 (± 1419.40) |
1.04 |
2-2 |
1253.57 |
|||
2-3 |
2248.76 |
|||
2-4 |
2821.62 |
|||
2-5 |
5085.50 |
|||
50 % test item |
3-1 |
5282.53 |
5771.17** (± 1259.83) |
2.18 |
3-2 |
3837.39 |
|||
3-3 |
7016.92 |
|||
3-4 |
6108.25 |
|||
3-5 |
6610.76 |
|||
25 % test item |
4-1 |
6484.02 |
6337.30** (±715.81) |
2.39 |
4-2 |
6983.00 |
|||
4-3 |
5108.28 |
|||
4-4 |
6606.98 |
|||
4-5 |
6504.24 |
|||
Positive control (25 % v/v in acetone: olive oil 4:1 v/v) |
5-1 |
9531.50 |
12624.09** (± 6427.06) |
4.77 |
5-2 |
8968.44 |
|||
5-3 |
6686.66 |
|||
5-4 |
15321.04 |
|||
5-5 |
22612.79 |
** p < 0.01
a2 lymph nodes per animal
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The test item was considered to be a non-sensitiser under the conditions of the test. Based on the condition of this study, the test item does not meet the criteria for classification according to the Globally Harmonized Classification System and to the Regulation (EC) No. 1272/2008, relating to the Classification, Labelling and Packaging of Substances and Mixtures.
- Executive summary:
OECD 429 (2017) - In a dermal sensitization study with Reaction mass of (4R)-4-isopropenyl-1-methylcyclohexene and (4R)-4-(2-methoxypropan-2-yl)-1-methylcyclohexene in acetone: olive oil (4:1 v/v)young female adult mice (CBA/Ca (CBA/CaOlaHsd)) were tested using the Local Lymph Node Assay (LLNA)
Following a preliminary screening test in which no clinical signs of toxicity were noted at a concentration of 100 %, this concentration was selected as the highest dose investigated in the main test. Three groups, each of five animals, were treated with 50 μL (25 μL per ear) of the undiluted test item or the test item as a solution in the vehicle at concentrations of 50 % or 25 % v/v. A further group of five animals was treated with the vehicle alone. A concurrent positive control test, using a group of five animals, was also performed with the known sensitiser, α-Hexylcinnamaldehyde tech., 85%, at a concentration of 25 % v/v in the vehicle.
There were no signs of systemic toxicity, local skin irritation observed and ear thickness were within normal range. There were no clinical abnormalities or macroscopic abnormalities of the surrounding area were noted for any of the animals and no mortality reported during the study. The Stimulation Index, expressed as the mean radioactive incorporation for each treatment group divided by the mean radioactive incorporation of the vehicle control group, was determined for each treatment group.
There was no indication that the test item elicits a Stimulation Index ≥ 3 when tested up to 100 %, the test item was considered to be a non-sensitiser under the conditions of the test.
In this study, Reaction mass of (4R)-4-isopropenyl-1-methylcyclohexene and (4R)-4-(2-methoxypropan-2-yl)-1-methylcyclohexene was not a dermal sensitizer.
Based on the condition of this study, the test item does not meet the criteria for classification according to the Globally Harmonized Classification System and to the Regulation (EC) No. 1272/2008, relating to the Classification, Labelling and Packaging of Substances and Mixtures.
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