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EC number: 272-812-5 | CAS number: 68915-39-9
- 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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 009
- Report date:
- 2009
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)
- Remarks:
- QAU BASF SE (2009-09-15)
- Type of study:
- mouse local lymph node assay (LLNA)
Test material
- Reference substance name:
- Cyclohexane, oxidized, aq. ext., sodium salt
- EC Number:
- 272-812-5
- EC Name:
- Cyclohexane, oxidized, aq. ext., sodium salt
- Cas Number:
- 68915-39-9
- Molecular formula:
- Unspecified (UVCB substance)
- IUPAC Name:
- Cyclohexane, oxidized, aq. ext., sodium salt
- Details on test material:
- - Name of test material (as cited in study report): Natriumcarboxylat-Loesung
- Analytical purity: Aqueous preparation
- Lot/batch No.: Probe EX 1672
- Stability under test conditions: stable under storage conditions over the study period
Constituent 1
In vivo test system
Test animals
- Species:
- mouse
- Strain:
- CBA
- Sex:
- female
- Details on test animals and environmental conditions:
- TEST ANIMALS
- Source: Charles River Laboratories, Sulzfeld
- Age at study initiation: 8 – 12 weeks
- Weight at study initiation: 19.2 g – 21.1 g
- Housing: single
- Diet (e.g. ad libitum): Kliba-Labordiet
- Water (e.g. ad libitum): Tap water
- Acclimation period: 14 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20-24
- Humidity (%): 30-70
- Photoperiod (hrs dark / hrs light): 12/12
Study design: in vivo (LLNA)
- Vehicle:
- other: 1% Pluronic L 92 Surfactant
- Concentration:
- Undiluted test item with addition of 1% Pluronic (99+1)
- No. of animals per dose:
- 5 females
- Details on study design:
- Radioactive Murine Local Lymph Node Assay including measurement of ear thickness.
- Groups of 5 female CBA/J mice each were treated with the undiluted test substance with addition of 1% Pluronic or with 1% aqueous Pluronic alone.
The study used 1 test and 1 control group. Each test animal was applied with 25 μL of the test substance per ear for 3 consecutive days.
- 3 days after the last application the mice were injected intravenously with 20 μCi of 3H-thymidine in 250 μL of sterile saline into a tail vein. About 5 hours after the 3H-thymidine injection, the mice were sacrificed and the auricular lymph nodes were removed. The weights of each animal’s pooled lymph nodes were determined. Thereafter lymph nodes were pooled group wise and further evaluated by measuring their cellular content and 3H-thymidine incorporation into the lymph node cells. Moreover, a defined area with a diameter of 0.8 cm was punched out of the apical part of each ear and for each test group the weight of the pooled punches was determined in order to obtain an indication of possible skin irritation.
- Calculations: The stimulation indices of cell count, 3H-thymidine incorporation, lymph node weight and ear weight were calculated as the ratio of the test group values for these parameters divided by those of the vehicle control group.
- Criteria used to consider a positive response: The parameters used to characterize the response are lymph node cell count, 3H-thymidine incorporation into the lymph node cells and to a certain extent lymph node weight. Because not only sensitization induction but also irritation of the ear skin by the test item may induce lymph node responses, the weight of ear punches taken from the area of test-item application is determined as a parameter for inflammatory ear swelling serving as an indicator for the irritant action of the test item. The increase SI of cell count by a factor of ≥ 1.5 and/or of 3H-thymidine incorporation by a factor of ≥ 3 as compared to the concurrent vehicle control group is generally considered as indicating a sensitizing potential of a test item. - Positive control substance(s):
- other: see free text
Results and discussion
In vivo (LLNA)
Results
- Parameter:
- SI
- Remarks on result:
- other: see Remark
- Remarks:
- The undiluted test substance with addition of 1% Pluronic did not induce a biologically relevant response (no increase to 1.5 fold or above of control value = stimulation index (SI) ≥ 1.5) in the auricular lymph node cell counts. Concomitantly, the increase of 3H-thymidine incorporation into the cells was not biologically relevant (no increase above the cut off stimulation index of 3) at this concentration.
Any other information on results incl. tables
The stimulation indices (fold of change as compared to the vehicle control) for cell count, 3H-thymidine incorporation, lymph node weight and ear weight are summarized for each test group in the table below.
Treatment |
Cell Count SI |
3H-thymidine incorporation SI |
Lymph Node weight SI |
Ear weight SI |
vehicle 1% aqueous Pluronic |
1.00 |
1.00 |
1.00 |
1.00 |
test item + Pluronic (99+1) * |
1.13 |
1.3 |
1.04 |
1.11 |
* Calculation on basis of 4 animals, as one animal died during 3H-thymidine injection.
No signs of systemic toxicity were noticed.
There was no increase in lymph node weights, as well.
The test substance caused some increase in ear weights. Minimal test-substance residues were observed on the ears of all animals on study days 1 and 2 and on the day of lymph node removal. One animal showed pull out of hair on the ears on the day of lymph node removal. Due to the test-substance residues the increase in ear weights cannot unequivocally be attributed to ear skin irritation.
In a pretest with the undiluted test substance with addition of 1% Pluronic no increase in lymph node weights was observed. Although, some increase in ear weights as indication of ear irritation was noted. Additionally, the pretest showed the feasibility of applying the undiluted test substance without producing any toxic effects compromising the outcome of a full study.
Applicant's summary and conclusion
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