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EC number: 251-178-3 | CAS number: 32724-62-2
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
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:
- 2 012
- Report date:
- 2012
Materials and methods
- Principles of method if other than guideline:
- The modified Local Lymph Node Assay (IMDS) was performed on 24 female NMRI mice of the strain Crl:NMRI BR (6 animals/test item group and 6 control animals) to determine if there is any specific (sensitizing) or non-specific (irritant) stimulating potential of the test item Macrolex Blau 3R.
The modifications refer to the measurement of cell proliferation by cell counting instead of radioactive labeling. In addition, the acute inflammatory skin reaction is determined to discriminate specific from non-specific activation of immune competent cells in the draining lymph nodes. - GLP compliance:
- yes
- Type of study:
- mouse local lymph node assay (LLNA)
Test material
- Reference substance name:
- 1,4-bis[(2-ethyl-6-methylphenyl)amino]anthraquinone
- EC Number:
- 255-460-7
- EC Name:
- 1,4-bis[(2-ethyl-6-methylphenyl)amino]anthraquinone
- Cas Number:
- 41611-76-1
- Molecular formula:
- C32H30N2O2
- IUPAC Name:
- 1,4-bis[(2-ethyl-6-methylphenyl)amino]-9,10-anthraquinone
- Details on test material:
- Test item: Macrolex Blau 3R
Synonym: Reinblau RLW
CAS name: 1,4-Bis[(2-ethyl-6-methylphenyl)amino]-9,10-anthracenedione
CAS number: 41611-76-1
Batch No.: CHN23196
Content: 99.5 % (not used for calculation)
Sum formula: C32H30N2O2
Molecular mass: 474.6 g/mol
pH-value: 1:9 diluted in water: 6.3
Physical state: solid
Appearance: blue
Constituent 1
In vivo test system
Test animals
- Species:
- mouse
- Strain:
- NMRI
- Sex:
- female
Study design: in vivo (LLNA)
- Vehicle:
- dimethylformamide
- Concentration:
- Group 1 Vehicle (DMF)
Group 2 2% Macrolex Blau 3R (in DMF)
Group 3 10% Macrolex Blau 3R (in DMF)
Group 4 50% Macrolex Blau 3R (in DMF)
Group 5 40% Alpha Hexyl Cinnamic Aldehyde (in DMF) - No. of animals per dose:
- 6 animals/test item group and 6 control animals
Results and discussion
In vivo (LLNA)
Resultsopen allclose all
- Key result
- Parameter:
- SI
- Remarks on result:
- other: see Remark
- Remarks:
- A modified Local Lymph Node Assay (IMDS) was carried out in mice. The modifications refer to the measurement of cell proliferation by cell counting instead of radioactive labeling. Tabular summary of the LLNAlIMDS results 1. Direct LLNA (NMRI mice, female, 6 animals/group) Groups Weight index Cell count index (index of mean +/-SD in 0/0) Gr. 1 1.00 +/-25.83 1.00 +/-39.31 Gr. 2 0.84 +/-23.33 0.94 +/-27.50 Gr. 3 0.81 +/-33.06 0.97 +/-38.44 Gr. 4 1.06 +/-23.52 1.24 +/-35.52 Gr. 5 1.58s +/-24.81 1.90s +/-24.42 2. Ear swelling (NMRI mice, female, 6 animals/group, in 0.01 mm) Groups day 1 day 4 Index day 4 (mean +/-SD in %) Gr. 1 17.33 +/-2.84 17.75 +/-2.55 1.00 Gr. 2 17.17 +/-2.27 17.58 +/-3.80 0.99 Gr. 3 17.17 +/-3.36 17.75 +/-4.88 1.00 Gr. 4 17.25 +/-2.62 17.75 +/-2.55 1.00 Gr. 5 17.00 +/-3.55 28.08s +/-17.54 1.58 3. Ear weight (NMRI mice, female, 6 animals/group, in mg per 8 mm diameter punch) Groups day 4 Index day 4 (mean +/-SO in %) Gr. 1 12.01 +/-5.49 1.00 Gr. 2 12.09 +/-3.45 1.01 Gr. 3 12.38 +/-6.32 1.03 Gr. 4 13.30 +/-11.65 1.11 Gr. 5 18.12s +/-11.42 1.51 s = statistically significant increase (p< 0.05) Group 1 Vehicle (DMF) Group 2 2% Macrolex Blau 3R (in DMF) Group 3 10% Macrolex Blau 3R (in DMF) Group 4 50% Macrolex Blau 3R (in DMF) Group 5 40% Alpha Hexyl Cinnamic Aldehyde (in DMF)
- Parameter:
- other: disintegrations per minute (DPM)
- Remarks on result:
- other: not applicable
Any other information on results incl. tables
Based on results obtained in validation studies and general experiences with this test system groups of mice were treated with vehicle, 2 %, 10 % or 50 % Macrolex Blau 3R in DMF.
The NMRI mice did not show an increase in the stimulation indices for cell counts or for weights of the draining lymph nodes after application of the test item Macrolex Blau 3R.
The “positive level”, which is 1.4 for the cell count index, was never reached or exceeded in any dose group.
The “positive level” of ear swelling, which is 2x10E-2 mm increase, i.e. about 10 % of the control values, has not been reached or exceeded in any dose group.
No substance specific effects were determined for ear weights either.
After treatment with Alpha Hexyl Cinnamic Aldehyde (group 5) the NMRI mice showed clear increases in the weights of the draining lymph nodes and in the stimulation indices for cell counts compared to control animals, which are of statistical significance. The “positive level”, which is 1.4 for cell count indices, has clearly been exceeded.
The “positive level” of ear swelling, which is 2x10E-2 mm increase, i.e. about 10 % of the control values, has been exceeded in the positive control group. This increase is of statistical significance. A significant increase compared to vehicle treated animals regarding ear weights was detected, too.
It has to be clarified that the “positive levels” mentioned above are exclusively defined for the NMRI outbreed mice used for this study. Such positive limits have to be calculated for each strain of mice individually.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The test item Macrolex Blau 3R has no sensitizing potential in mice after dermal application of up to and including a 50 % concentration.
- Executive summary:
A modified Local Lymph Node Assay (IMDS) was performed on 24 female NMRI mice of the strain HsdWin:NMRI (6 animals/test item group and 6 control animals) to determine if there is any specific (sensitizing) or non-specific (irritant) stimulating potential of the test item Macrolex Blau 3R.
A concurrent control of 6 animals treated with Alpha Hexyl Cinnamic Aldehyde was included.
The study was conducted according to OECD Guidelines No. 429 and No. 406,
EC Guideline 2004/73/EC (29th Adaptation of Guideline 67/548/EEC, B.42)/Health Effects Test Guideline and OPPTS 870.2600 (EPA) with the following test item concentrations:
Test item: 0 % (vehicle control), 2 %, 10 % and 50 %.
Positive control: 40 % Alpha Hexyl Cinnamic Aldehyde
The test item was formulated in dimethylformamide (DMF) to yield a suspension.
The positive control was formulated in dimethylformamide (DMF) to yield a solution.
Compared to vehicle-treated animals, none of the parameters measured in the substance-treated groups, i.e. cell counts and weights of the draining lymph nodes, ear weights and ear swelling, reached or exceeded the "positive levels" defined for this assay. These results show that there is no indication for a skin sensitizing effect after administration of a concentration up to and including 50 % Macrolex Blau 3R in this test system.
In conclusion, these results show that the test item Macrolex Blau 3R has no sensitizing potential in mice after dermal application of up to and including a 50 % concentration. No indication for a non-specific (irritant) activation was detected, too. Therefore, the concentration of 50 % turned out to be the NOEL for the parameters investigated in this study with respect to skin sensitization.
These results are verified by the comparison with the results of the positive control group (Alpha Hexyl Cinnamic Aldehyde).
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