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EC number: 254-911-5 | CAS number: 40412-06-4
- 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:
- 26 March 2013 - 08 April 2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 014
- Report date:
- 2014
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
- Version / remarks:
- 2010
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay)
- Version / remarks:
- 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 870.2600 (Skin Sensitisation)
- Version / remarks:
- 2003
- Deviations:
- no
- GLP compliance:
- yes
- Type of study:
- mouse local lymph node assay (LLNA)
Test material
- Reference substance name:
- 2-(2-thienyl)ethyl toluene-p-sulphonate
- EC Number:
- 254-911-5
- EC Name:
- 2-(2-thienyl)ethyl toluene-p-sulphonate
- Cas Number:
- 40412-06-4
- Molecular formula:
- C13H14O3S2
- IUPAC Name:
- 2-(thiophen-2-yl)ethyl 4-methylbenzene-1-sulfonate
- Test material form:
- solid: particulate/powder
- Details on test material:
- - Appearance: White to off-white powder
- Storage condition of test material: At room temperature in the dark
Constituent 1
In vivo test system
Test animals
- Species:
- mouse
- Strain:
- other: CBA/J
- Sex:
- female
- Details on test animals and environmental conditions:
- - Source: Janvier, Le Genest-Saint-Isle, France
- Age at study initiation: Young adult animals
(main study: approx. 10 weeks old; range finding test: approx. 12 weeks old)
- Weight at study initiation:
Main study: 20-24 g; range finding tests: 23-24 g
- Housing: Animals were group housed in labeled Makrolon cages
- Diet: Free access to pelleted rodent diet (SM R/M-Z from SSNIFF® Spezialdiäten GmbH, Soest, Germany).
- Water: Free access to tap water
- Acclimation period: At least 5 days
ENVIRONMENTAL CONDITIONS (set conditions)
- Temperature (°C): 18 – 24
- Humidity (%): 40 - 70
- Air changes (per hr): approx. 15
- Photoperiod (hrs dark / hrs light): 12/12
Variations to these conditions occurred (i.e. minimum relative humidity of 24 or 33% on a single day, respectively). Based on the laboratory’s extensive experience with variations in these parameters and absence of any clinical signs among the animals that could be associated to these variations, these were considered to have no effect on the outcome of the study.
IN-LIFE DATES: From: March 27, 2013 to April 08, 2013
Study design: in vivo (LLNA)
- Vehicle:
- acetone/olive oil (4:1 v/v)
- Concentration:
- 0, 10, 25, 50%
- No. of animals per dose:
- 5
- Details on study design:
- RANGE FINDING TESTS
In a pre-screen test, two test substance concentrations were tested; a 25% and 50% concentration. Two young adult animals per concentration were selected. Each animal was treated with one concentration for three consecutive days. Ear thickness measurements were conducted prior to dosing on Days 1 and 3, and on Day 6. Animals were sacrificed after the final observation.
MAIN STUDY
INTERPRETATION
- Criteria used to consider a positive response: The SI is the ratio of the DPM/group compared to DPM/vehicle control group. If the results indicate a SI ≥ 3, the test substance may be regarded as a skin sensitizer.
ANIMAL ASSIGNMENT
Three groups of five animals were treated with one test substance concentration per group. One group of five animals was treated with vehicle.
TREATMENT PREPARATION AND ADMINISTRATION:
- Test substance preparation: The test substance formulations (w/w) were prepared within 4 hours prior to each dosing. No adjustment was made for specific gravity of the vehicle. Homogeneity was obtained to visually acceptable levels by shaking, vortexing and stirring. This resulted in a solution for the 10, 25 and 50% concentration.
- Rationale for vehicle: The vehicle was selected based on trial formulations performed at WIL Research.
Performed according to test guidelines:
- Days 1, 2 and 3: Induction. Topical treatment of 25 µL/ear, using a pipette, at approx. the same time on each day
- Day 6: Injection of 20 µCi 3H-methyl thymidine. Five hours after the injection, all animals were killed and the ear lymph nodes were excised. The relative size of the nodes (as compared to normal) was estimated by visual examination and abnormalities of the nodes and surrounding area were recorded. The nodes were pooled for each animal in approximately 3 mL Phosphate buffered saline (PBS).
- Day 6: Tissue processing for radioactivity. A single cell suspension of lymph node cells was prepared in PBS by gentle separation through stainless steel gauze (diameter 125 μm). The cells were washed twice with an excess of PBS by centrifugation at 200 g for 10 minutes at 4°C. To precipitate the DNA, the cells were exposed to 5% trichloroacetic acid (TCA) and stored in the refrigerator until the next day.
- Day 7: Radioactivity measurements using a Packard scintillation counter (2800TR). Precipitates were recovered by centrifugation, resuspended in 1 mL TCA and transferred to 10 mL of Ultima Gold cocktail (PerkinElmer Life and Analytical Sciences, Boston, US) as the scintillation fluid.
Observations:
Mortality/Viability: Twice daily.
Body weights: On Day 1 (pre-dose) and Day 6 (prior to necropsy).
Clinical signs: Once daily on Days 1-6 (on Days 1-3 between 3 and 4 hours after dosing).
Irritation: Once daily on Days 1-6 (on Days 1-3 within 1 hour after dosing) - Positive control substance(s):
- hexyl cinnamic aldehyde (CAS No 101-86-0)
Results and discussion
- Positive control results:
- The six-month reliability check with Alpha-hexylcinnamicaldehyde indicates that the Local Lymph Node Assay as performed at WIL Research Europe is an appropriate model for testing for contact hypersensitivity.The SI values calculated for the concentrations 5, 10 and 25% were 1.3, 2.0 and 5.3, respectively. An EC3 value of 14.5% was calculated using linear interpolation.
In vivo (LLNA)
Resultsopen allclose all
- Key result
- Parameter:
- SI
- Value:
- 0.8
- Test group / Remarks:
- Substance concentration 10%
- Key result
- Parameter:
- SI
- Value:
- 0.7
- Test group / Remarks:
- Substance concentration 25%
- Key result
- Parameter:
- SI
- Value:
- 0.9
- Test group / Remarks:
- Substance concentration 50%
- Cellular proliferation data / Observations:
- CELLULAR PROLIFERATION DATA
The auricular lymph nodes of 2 animals at 25% and 4 animals at 50% appeared larger in size as compared to the other treated groups. These changes in size did not show a relation to DPM/animal values. No macroscopic abnormalities of the surrounding area were noted in any of the animals.
DETAILS ON STIMULATION INDEX CALCULATION
Mean DPM/animal values for the experimental groups treated with test substance concentrations 10, 25 and 50% were 463, 443 and 518 DPM respectively. The mean DPM/animal value for the vehicle control group was 610 DPM. Variability in measured DPM values was within the expected variation for this type of study.
EC3 CALCULATION
Not applicable
CLINICAL OBSERVATIONS
No mortality occurred and no clinical signs of systemic toxicity were observed in the animals of the main study.
No irritation of the ears was observed in any of the animals examined.
BODY WEIGHTS
Body weights and body weight gain of experimental animals remained in the same range as controls over the study period. The body weight loss noted for some animals across the dose groups was considered not toxicologically significant since the changes were slight in nature and no concentration-related incidence was apparent.
Any other information on results incl. tables
Results Pre-screen test:
No irritation and no signs of systemic toxicity were observed in any of the animals examined.
Variations in ear thickness during the observation period remained within the acceptable range (i.e. less than the maximum of 25% from Day 1 pre-dose values). Based on these results, the highest test substance concentration selected for the main study was a 50% concentration (highest technically possible concentration for a solid).
Applicant's summary and conclusion
- Interpretation of results:
- other: the substance does not need to be classified as skin sensitiser according to GHS and CLP
- Conclusions:
- In an LLNA skin sensitisation study, performed according to OECD 429 and according to GLP principles, the substance was considered not to be a skin sensitiser, as the SI was shown to be < 3 when tested up to and including 50%.
- Executive summary:
An LLNA skin sensitisation study was performed according to OECD 429 and according to GLP principles with the substance. Reliable positive and negative controls were included. Based on the results of a pre-screen test, three experimental groups of five female CBA/J mice were treated with test substance concentrations of 10, 25 or 50% w/w (the highest technically feasible dose) on three consecutive days, by open application on the ears. Five vehicle control animals were similarly treated, but with vehicle alone (Acetone/Olive oil (4:1 v/v)). No irritation of the ears was observed in any of the animals examined. The auricular lymph nodes of 2 animals at 25% and 4 animals at 50% appeared larger in size as compared to the other treated groups. These changes in size did not show a relation to DPM/animal values. No macroscopic abnormalities of the surrounding area were noted in any of the animals. Mean DPM/animal values for the experimental groups treated with test substance concentrations 10, 25 and 50% were 463, 443 and 518 DPM respectively. The mean DPM/animal value for the vehicle control group was 610 DPM. Variability in measured DPM values was within the expected variation for this type of study. The SI values calculated for the substance concentrations 10, 25 and 50% were 0.8, 0.7 and 0.9 respectively. Based on these data, the substance is considered not to be a skin sensitiser, as the SI was shown to be < 3 when tested up to and including 50%. The substance does not need to be classified as skin sensitiser according to GHS and CLP.
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