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EC number: 612-028-6 | CAS number: 607724-47-0
- 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:
- 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.42 (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:
- 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3,8-bis[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, trisodium salt
- EC Number:
- 612-028-6
- Cas Number:
- 607724-47-0
- Molecular formula:
- C26H22N5Na3O16S5
- IUPAC Name:
- 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3,8-bis[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, trisodium salt
- Test material form:
- solid: particulate/powder
- Details on test material:
- 1 MATERIALS AND METHODS
1.2 Test Item
Designation in Test Facility: 17031402G
Date of Receipt: 14. Mar. 2017
Condition at Receipt Room temperature, in proper conditions
1.2.1 Specification.
Name Blendazol Red Blendwell
Batch no. E 328
Appearance Dark Red Powder
Composition 2-Naphtalenesulfonic acid, 7-amino-4-hydroxy-3,8-bis[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, triso dium salt
Purity 95 % by HPLC
Homogeneity homogeneous
Expiry date 17. Feb. 2019
Storage Room Temperature: (20 ± 5°C); Keep away from humidity
CAS No. 607724-47-0
EINECS-No. 612-028-6
Chemical Class not stated
Stability H2O: 96h; EtOH: unknown; acetone: unknown CH3CN: unknown; DMSO: unknown
Solubility H2O: to be determined*; EtOH: unknown; acetone: unknown CH3CN: unknown; DMSO: unknown
* Will be determined in another GLP-study at LAUS GmbH and will be stated in the final report, this
This information is not provided by the sponsor but determined at LAUS GmbH.
Constituent 1
In vivo test system
Test animals
- Species:
- mouse
- Strain:
- CBA/Ca
- Sex:
- female
- Details on test animals and environmental conditions:
- TEST ANIMALS
- Source:AnLab Prague, Czech Republic
- Females (if applicable) nulliparous and non-pregnant: yes
- Microbiological status of animals, when known: free
- Age at study initiation: 8-10 weeks
- Weight at study initiation:
- Housing:
The animals were housed in polypropylene cages (5 animals per cage) suspended on stainless steel racks, in a room equipped with central air-conditioning. The room temperature was within the range of 22 ± 3°C, relative humidity was within the range of 50 - 60 %. The light regimen was set to a 12-hour light / 12-hour dark cycle. The sanitation was performed according to standard operation procedures
- Diet (e.g. ad libitum):
A laboratory food ssniff (ssniff Spezialdiäten GmbH, Germany) was served ad libitum, each day approximately at the same time.
- Water (e.g. ad libitum): tap water for human consumption
- Acclimation period: 6 days
- Indication of any skin lesions: no
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22°
- Humidity (%): within the range of 50 - 60 %.
- Air changes (per hr): +/-3°C
- Photoperiod (hrs dark / hrs light): 12-hour light / 12-hour dark cycle
- IN-LIFE DATES: From: To: 24/05/2017 TO 20/06/2017
Study design: in vivo (LLNA)
- Vehicle:
- dimethyl sulphoxide
- Remarks:
- Lot number : SZBG 1310V from Honeywell, Germany
- Concentration:
- 25%; 50% and 100%,
- No. of animals per dose:
- 2 mice/group per dose
- Details on study design:
- PRE-SCREEN TESTS:
- Compound solubility: The test item was insoluble in the vehicle; therefore, a homogeneous suspension was obtained.
- Irritation: no
- Systemic toxicity: no
The test item was administered in two mice at concentration of 100%. After the test item application, no signs of local irritation at the application site or systemic toxicity were observed
On day 1 (pre dose), day 3 and day 6 the ear thickness was measured
- Ear thickness measurements: the increase in ear thickness did not meet the criteria
- Erythema scores: 0
MAIN STUDY
ANIMAL ASSIGNMENT AND TREATMENT
- Name of test method: LLNA
- Criteria used to consider a positive response:
No erythema 0
Very slight erythema (barely perceptible) 1
Well-defined erythema 2
Moderate to severe erythema 3
Severe erythema (beet
redness) to eschar formation preventing grading of erythema 4
TREATMENT PREPARATION AND ADMINISTRATION:
Day 1:
Each animal was identified and the body weight was recorded. To the dorsum of each ear 25µL of the appropriate dilution of the test item, or the vehicle alone was applied.
Days 2 and 3:
The application procedure carried out on day 1 was repeated.
Days 4 and 5: No treatment.
Day 6:
The body weight of each animal was recorded. 250µL of phosphate-buffered saline (PBS) containing 2 µCi (7.4 x 104 Bq) of 125I-iododeoxyuridine and 10-5M fluorodeoxyuridine was injected into all test and control mice via the tail vein.
Five hours later, the animals were sacrificed. The draining auricular lymph nodes from each ear were excised and pooled in PBS for each experimental group (pooled treatment group approach). - Positive control substance(s):
- hexyl cinnamic aldehyde (CAS No 101-86-0)
- Statistics:
- Number of animals:
5 females – control (vehicle)
5 females – positive control
15 females – test item
4 females - pre-screen test plus spare animals
Results and discussion
- Positive control results:
- Lymph node weight (g) Number of lymph nodes DPM SI
Positive Control 0.0699 10 12996 8.25
In vivo (LLNA)
Resultsopen allclose all
- Key result
- Parameter:
- EC3
- Value:
- ca. 42
- Test group / Remarks:
- 25% 50% & 100%
- Key result
- Parameter:
- SI
- Value:
- ca. 2.08
- Test group / Remarks:
- 25%
- Key result
- Parameter:
- SI
- Value:
- ca. 3.43
- Test group / Remarks:
- 50%
- Key result
- Parameter:
- SI
- Value:
- ca. 5.09
- Test group / Remarks:
- 100%
- Cellular proliferation data / Observations:
- CELLULAR PROLIFERATION DATA
:
In comparison with the control group, an increase of the pooled lymph node weights was recorded at all used concentrations. The pooled lymph node weights of treated groups were 0.0476g for 25% concentration, 0.0516g for 50% concentration and 0.0606g for 100% concentration of tested item. The lymph node weight of control group and positive control group were 0.0311g and 0.0699g, respectively. The DPM values for the three treated groups were 3269 (25%), 5406 (50%) and 8021 (100%), respectively. The SI values for the three treated groups were 2.08 (25%), 3.43 (50%) and 5.09 (100%), respectively. The EC3 value is calculated to be 42.0%.
DETAILS ON STIMULATION INDEX CALCULATION :
The SI was obtained by dividing the pooled DPM for each treatment group by the incorporation of the pooled DPM vehicle control group; this yields a mean SI.
EC3 CALCULATION
EC3 value, which induce stimulation indices, is determined by linear interpolation of points on dose-response curve, immediately above and below of SI value, according to the equation:
EC3=c+[(3-d)/(b-d)]x(a-c)
a – higher concentration, b – SI of higher concentration, c – lower concentration
d – SI of lower concentration
If all points are below the stimulation index of three, no EC3 value can be stated.
CLINICAL OBSERVATIONS:
Animals were carefully observed for any clinical symptoms, either of local irritation at the application site or systemic toxicity. The daily clinical observation of the animals did not show visible clinical signs.
BODY WEIGHTS
The animal body weights were measured prior to the first treatment and at the scheduled sacrifice. A minor increase of body weight was observed in all treated groups. The increase was not statistically significant.
Any other information on results incl. tables
1.1.1 Lymph Node Proliferation
In comparison with the control group, an increase of the pooled lymph node weights was recorded at all used concentrations. The pooled lymph node weights of treated groups were 0.0476g for 25% concentration, 0.0516g for 50% concentration and 0.0606g for 100% concentration of tested item. The lymph node weight of control group and positive control group were 0.0311g and 0.0699g, respectively. The DPM values for the three treated groups were 3269 (25%), 5406 (50%) and 8021 (100%), respectively. The SI values for the three treated groups were 2.08 (25%), 3.43 (50%) and 5.09 (100%), respectively. The EC3 value is calculated to be 42.0%.
The mean Lymph node weight, DPM, SI, EC3 values.
|
Lymph node |
Number of |
|
|
|
|
weight (g) |
lymph nodes |
DPM |
SI |
EC3 (%) |
Control |
0.0311 |
10 |
1575 |
- |
42.0
|
Positive Control |
0.0699 |
10 |
12996 |
8.25 |
|
Blendazol Red Blendwell 25% |
0.0476 |
10 |
3269 |
2.08 |
|
Blendazol Red Blendwell50% |
0.0516 |
10 |
5406 |
3.43 |
|
Blendazol Red Blendwell 100% |
0.0606 |
10 |
8021 |
5.09 |
Applicant's summary and conclusion
- Interpretation of results:
- Category 1B (indication of skin sensitising potential) based on GHS criteria
- Conclusions:
- These results demonstrate that Blendazol Red Blendwell is a potential skin sensitizer under the test conditions of this study.
- Executive summary:
The skin sensitization potential of Blendazol Red Blendwell was evaluated by LLNA method, which was developed based on scientific understanding of the immunological mechanism of skin sensitization.
In our experiments, the test item was applied over three consecutive days, at three concentrations. All animals survived throughout the test period without showing any clinical signs.In comparison with the control group, the increase in lymph node weight was observed in all treated groups. The increase of lymph node weight was dose dependent. A similar trend was registered in the evaluation of DPM of the lymph nodes.The EC3 value is calculated to be 42.0%. As the SI for some treatment dose group is ≥3 and a clear dose response is observed, the test item is regarded as a potential skin sensitizer (2, 11).
These results demonstrate that Blendazol Red Blendwell is a potential skin sensitizer under the test conditions of this study.
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