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EC number: 256-851-5 | CAS number: 50925-42-3
- 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 irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vivo
- 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:
- 1 991
- Report date:
- 1991
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
- Principles of method if other than guideline:
- 500 mg of the pulverized test substance were moistened with water (to ensure good contact with the skin) and subsequently applied to a hypoallergenic Hansamed® - patch. A further patch was moistened with water. The patches prepared in this way were placed on the opposite dorso-lateral areas of the trunk of each animal and were loosely held in place with a semiocclusive dressing for the duration of the exposure period. The treated skin area was approx. 6 cm² in size. After an exposure period of four hours, the dressing and patches were removed. The exposed skin areas were carefully washed with water and scored according to Draize.
- GLP compliance:
- yes
Test material
- Reference substance name:
- Tetrasodium 3,3'-[[6-[(2-hydroxyethyl)amino]-1,3,5-triazine-2,4-diyl]bis[imino(2-methyl-4,1-phenylene)azo]]bisnaphthalene-1,5-disulphonate
- EC Number:
- 256-851-5
- EC Name:
- Tetrasodium 3,3'-[[6-[(2-hydroxyethyl)amino]-1,3,5-triazine-2,4-diyl]bis[imino(2-methyl-4,1-phenylene)azo]]bisnaphthalene-1,5-disulphonate
- Cas Number:
- 50925-42-3
- Molecular formula:
- C39H30N10Na4O13S4
- IUPAC Name:
- tetrasodium 3,3'-({6-[(2-hydroxyethyl)amino]-1,3,5-triazine-2,4-diyl}bis[imino(2-methyl-4,1-phenylene)diazene-2,1-diyl])dinaphthalene-1,5-disulfonate
Constituent 1
- Specific details on test material used for the study:
- State of Aggregation: solid
External Appearance: yellow-brown powder
contents: 100%
pH: 6-7 (40 g/L H2O)
Test animals
- Species:
- rabbit
- Strain:
- New Zealand White
- Details on test animals or test system and environmental conditions:
- Species and species justification
The study was conducted on rabbits an animal species recommended in the guidelines for this type of study.
Healthy adult albino rabbits, strain HC:NZW were used. The health of the animals was routinely examined for the main specific pathogens by the breeder. No vaccinations or treatment with antibiotics were perf'ormed prior to receipt of' the animals or during the acclimatization phase or study period.
Housing and feeding conditions
The rabbits were individually housed in stainless steel cages with flat rod bases or plastic cages with perforated bases, under standardized conventional conditions. Excrement trays beneath the cages contained low-dust (wood) bedding. Bedding was regularly spot-checked for contaminants at the instance of the Department of Laboratory Animal Services, and changed at least twice weekly.
Identification of animals: The rabbits were identified by individual ear marks (tattoos) and cage cards.
Acclimatization:
Prior to the initiation of the treatment the animals were kept for at least 14 days in the quarantine station of the Department of Laboratory Animal Services and monitored for diseases. During this period pooled faeces specimens were examined for Coccidia oocysts.
Animal housing conditions:
All the animals in this study were kept in one room.
Climatic conditions in animal room:
The environmental conditions were adjusted as follows:
Room temperature: 20 ± 3 °C
Humidity, relative: approx. 50 %
Light-/Dark cycle: 12 hours, artificial illumination
Air exchange rate: approx. 10 times per hour
Nutrition:
Feed: Standard diet "Ssniff K 411 (Ssniff Spezialdiäten GmbH, Soest), approx. 100 - 120 g per animal/day; once per day in the morning.
Water: Tap water; ad libitum.
Drink-water was supplied either in polycarbonate bottles containing approx. 750 ml or from automatic watering.
Weight of animals
The animals were weighed immediately before application of the test substance.
Randomization
Rabbits were randomly assigned to the respective treatment groups.
Test system
- Type of coverage:
- semiocclusive
- Preparation of test site:
- other: shorn
- Vehicle:
- water
- Controls:
- not required
- Amount / concentration applied:
- 500 mg of the pulverized test substance
- Duration of treatment / exposure:
- 4 hours
- Observation period:
- 7 days
- Number of animals:
- 3 animals
- Details on study design:
- Test for irritant/corrosive effects - skin
Procedure
Approximately 24 hours before the test, fur was shorn from the dorso-lateral area of the trunk (6 x 6 cm) of each of three rabbits. 500 mg of the pulverized test substance were moistened with water (to ensure good contact with the skin) and subsequently applied to a hypoallergenic patch. A further patch was moistened with water. The patches prepared in this way were placed on the opposite dorso-lateral areas of the trunk of each animal and were loosely held in place with a semiocclusive dressing for the duration of the exposure period. Thus, access by the animal to the patch and resultant ingestion/inhalation of the test substance was prevented. The treated skin area was approx. 6 cm² in size. After an exposure period of four hours, the dressing and patches were removed. The exposed skin areas were carefully washed with water without altering the existing response, or the integrity of the epidermis. The contralateral skin area not treated with test substance served as control.
Clinical observations and scoring
Dermal irritation was scored and recorded after termination of exposure at 1h, 24h, 48h, 72h and 7d . The degree of erythema/eschar formation and oedema formation was recorded as specified by DRAIZE, and any serious lesions or toxic effects other than dermal irritation were also recorded.
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- erythema score
- Remarks on result:
- other: evaluation not possible due to the intense coloration by the test substance
- Irritation parameter:
- edema score
- Basis:
- mean
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: score = 0 at any time point
- Irritant / corrosive response data:
- During the first 72 hours evaluation of erythema was not possible due to the intense coloration by the test substance (exposure period: 4 hrs). Other dermal reactions (e.g. edema) were not observed during this period and also no skin erythema became evident on day 7. Therefore, a significant irritant potential of the test substance to the skin is unlikely.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Evaluation of erythema was not possible during the first 72 hours due to the intense coloration by the test substance (exposure period: 4 hrs). Edema score was = at any time point (1h, 24h, 48h, 72h and 7d).
- Executive summary:
500 mg of the pulverized test substance were moistened with water (to ensure good contact with the skin) and subsequently applied to a hypoallergenic Hansamed® - patch. ( A further patch was moistened with water. The patches prepared in this way were placed on the opposite dorso-lateral areas of the trunk of each animal and were loosely held in place with a semiocclusive dressing for the duration of the exposure period. The treated skin area was approx. 6 cm² in size. After an exposure period of four hours, the dressing and patches were removed. The exposed skin areas were carefully washed with water and scored according to Draize. During the first 72 hours evaluation of erythema was not possible due to the intense coloration by the test substance (exposure period: 4 hrs). Other dermal reactions (e.g. edema) were not observed during this period and also no skin erythema became evident on day 7. Therefore, a significant irritant potential of the test substance to the skin is unlikely.
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