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EC number: 226-866-1 | CAS number: 5521-31-3
- 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:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 005
- Report date:
- 2005
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- RCC Cytotest Cell Research GmbH
- Type of study:
- mouse local lymph node assay (LLNA)
Test material
- Reference substance name:
- 2,9-dimethylanthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone
- EC Number:
- 226-866-1
- EC Name:
- 2,9-dimethylanthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone
- Cas Number:
- 5521-31-3
- Molecular formula:
- C26H14N2O4
- IUPAC Name:
- 2,9-dimethylisoquino[4',5',6':6,5,10]anthra[2,1,9-def]isoquinoline-1,3,8,10(2H,9H)-tetrone
- Details on test material:
- Test materials used in this dossier are all considered to fall under the definition of nano-materials according to the European Commission Recommendation 2011/696/EU as the synthesis and manufacturing of this pigment always yields particulate material with a fine particle size distribution.
Constituent 1
- Specific details on test material used for the study:
- - Physical state: solid
- Storage condition of test material: at room temperature protected from moisture
In vivo test system
Test animals
- Species:
- mouse
- Strain:
- other: CBA/CaOlaHsd
- Sex:
- female
- Details on test animals and environmental conditions:
- TEST ANIMALS
- Source: Harlan Netherlands
- Age at study initiation: 7 weeks (beginning of acclimatization)
- Housing: Makrolon Type I, with wire mesh top (EHRET GmbH, D-79302 Emmendingen) with granulated soft wood bedding (Harlan Winkelmann GmbH, D-33178 Borchen), housed individually
- Diet (e.g. ad libitum): pelleted standard diet (Harlan Winkelmann GmbH, D-33178 Borchen), ad libitum
- Water (e.g. ad libitum): tap water, ad libitum
- Acclimation period: Under test conditions after health examination. Only animals without any visible signs of illness will be used for the study.
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 ± 3
- Humidity (%): 30 - 70
- Photoperiod (hrs dark / hrs light): 12/12
Study design: in vivo (LLNA)
- Vehicle:
- dimethyl sulphoxide
- Concentration:
- 0% (vehicle control), 3.5%, 7% and 14% (based a non-GLP local toxicity pre-test, 14% was the highest technically applicable concentration in the chosen vehicle)
- No. of animals per dose:
- 4 females
- Details on study design:
- RANGE FINDING TESTS:
- Irritation: In a non-GLP conform pre-test in two mice, test item concentrations of 1.75, 3.5, 7 and 14 % (w/v) were tested on one ear each. No irritation effects were observed at these concentrations after a single application.
MAIN STUDY
TREATMENT PREPARATION AND ADMINISTRATION:
Each test group of mice was treated by topical (epidermal) application to the dorsal surface of each ear lobe (left and right) with different test item concentrations of 3.5, 7 and 14% (w/v) in DMSO. The application volume, 25 μl, was spread over the entire dorsal surface (∅ ∼ 8 mm) of each ear lobe once daily for three consecutive days. A further group of mice was treated with an equivalent volume of the relevant vehicle alone (control animals).
3H-methyl thymidine (3HTdR) was purchased from Amersham International (Amersham product code no. TRA 310; specific activity, 2 Ci/mmol; concentration, 1 mCi/ml). Five days after the first topical application, all mice were administered with 250 μl of 82 μCi/ml 3HTdR (corresponds to 20.5 μCi 3HTdR per mouse) by intravenous injection via a tail vein.
Approximately five hours after treatment with 3HTdR all mice were euthanised by intraperitoneal injection of Na-thiopental (Trapanal, Altana, D-78467 Konstanz).
The draining lymph nodes were rapidly excised and pooled per group (8 nodes per group). Single cell suspensions (in phosphate buffered saline) of pooled lymph node cells were prepared by gentle mechanical disaggregation through stainless steel gauze (200 μm mesh size). After washing two times with phosphate buffered saline (approx. 10 ml) the lymph node cells were resuspended in 5 % trichloroacetic acid (approx. 3 ml) and incubated at approximately +4 °C for at least 18 hours for precipitation of macromolecules. The precipitates were then resuspended in 5 % trichloroacetic acid (1 ml) and transferred to glass scintillation vials with 10 ml of ‘Ultima Gold’ scintillation liquid and thoroughly mixed.
The level of 3HTdR incorporation was then measured on a β-scintillation counter. Similarly, background 3HTdR levels were also measured in two 1ml-aliquots of 5 % trichloroacetic acid. The β-scintillation counter expresses 3HTdR incorporation as the number of radioactive disintegrations per minute (DPM).
- Criteria used to consider a positive response:
A test item is regarded as a sensitiser in the LLNA if the following criteria are fulfilled:
- First, that exposure to at least one concentration of the test item resulted in an incorporation of 3HTdR at least 3-fold or greater than that recorded in control mice, as indicated by the stimulation index.
- Second, that the data are compatible with a conventional dose response, although allowance must be made (especially at high topical concentrations) for either local toxicity or immunological suppression.
TREATMENT PREPARATION AND ADMINISTRATION:
The test item was placed into a volumetric flask glass beaker on a tared balance and the vehicle (DMSO) was quantitatively added. The test item concentrations were prepared individually. Homogeneity of the test item in the vehicle was maintained during treatment with the magnetic stirrer. The preparations were made freshly before each dosing occasion. - Positive control substance(s):
- other: α-Hexylcinnamaldehyde in acetone:olive oil, 4:1 (v/v)
- Statistics:
- The mean values and standard deviations were calculated in the body weight tables.
Results and discussion
In vivo (LLNA)
Resultsopen allclose all
- Parameter:
- SI
- Value:
- 1.4
- Test group / Remarks:
- 3.5%
- Parameter:
- SI
- Value:
- 1.3
- Test group / Remarks:
- 7%
- Parameter:
- SI
- Value:
- 2
- Test group / Remarks:
- 14%
Any other information on results incl. tables
No deaths occurred during the study period. No symptoms of local toxicity at the ears of the animals and no systemic findings were observed during the study period. Due to the intense red colour of the test item local irritation reactions such as ear redness could not be detected. The body weight of the animals, recorded prior to the first application and prior to treatment with 3HTdR, was within the range commonly recorded for animals of this strain and age.
Calculation | Result | |||||
Test item concentration | Group | Measurement DPM | DPM-BG a) | number of lymph nodes | DPM/lymph node b) | S.I. |
-- | BG I | 23.6 | -- | -- | -- | -- |
-- | BG II | 34.2 | -- | -- | -- | -- |
-- | CG 1 | 3467.18 | 3438.3 | 8 | 429.8 | |
3.5 % (w/v) | TG 2 | 4733.81 | 4704.9 | 8 | 588.1 | 1.4 |
7 % (w/v) | TG 3 | 4615.95 | 4587.1 | 8 | 573.4 | 1.3 |
14 % (w/v) | TG 4 | 6932.97 | 6904.1 | 8 | 863 | 2 |
BG = Background (1 ml 5% trichloroacetic acid) in duplicate
CG = Control Group
TG = Test Group
S.I. = Stimulation Index
a) = The mean value was taken from the figures BG I and BG II
b) = Since the lymph nodes of the animals of a dose group were pooled,
DPM/node was determined by dividing the measured value by the number of lymph nodes pooled
A test item is regarded as a sensitiser in the LLNA if the exposure to one or more test concentrations resulted in 3-fold or greater increase in incorporation of 3HTdR compared to the concurrent control, as indicated by the stimulation index. The estimated concentration of test item required to produce an S.I. of 3 is referred to as the EC3 value. In this study the EC3 value could not be calculated, since none of the tested concentrations induced an S.I. greater than 3. The test item was found to be not a skin sensitiser.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The test item was found not to be a skin sensitiser.
- Executive summary:
In GLP compliant study following OECD guideline 429 the test item dissolved in DMSO was assessed for its potential to induce a contact allergy. For this purpose a local lymph node assay was performed using test item concentrations of 3.5, 7 and 14%. No symptoms of local toxicity at the ears of the animals and no systemic findings were observed during the study period. Due to the intense red colour of the test item local irritation reactions such as ear redness could not be detected. In this study Stimulation Indices (S.I.) of 1.4, 1.3 and 2.0 were determined with the test item at concentrations of 3.5, 7 and 14% (w/v) in DMSO, respectively. The test item was not a skin sensitiser in this assay.
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