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Diss Factsheets
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EC number: 234-733-4 | CAS number: 12028-48-7
- 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
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Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vivo
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- key study
- Study period:
- 1998-02-25 to 1998-02-28 28
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Well documented, scientifically sound study that was conducted in accordance to GLP and OECD guideline 404 with no deviation to the protocol.
- Justification for type of information:
- 1. HYPOTHESIS FOR THE CATEGORY APPROACH: The hypothesis is that properties are likely to be similar or follow a similar pattern because of the presence of a common metal ion, in this case tungstate.
2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES):
Source: Ammonium paratungstate
Target: Ammonium metatungstate
3. CATEGORY APPROACH JUSTIFICATION: See Annex 3 in CSR
4. DATA MATRIX: See Annex 3 in CSR
Cross-reference
- Reason / purpose for cross-reference:
- read-across: supporting information
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 999
- Report date:
- 1999
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
- Deviations:
- no
- GLP compliance:
- yes
Test material
- Reference substance name:
- Ammonium wolframate
- EC Number:
- 234-364-9
- EC Name:
- Ammonium wolframate
- Cas Number:
- 11120-25-5
- Molecular formula:
- (NH4)10H2W12O42*4H2O
- IUPAC Name:
- Ammonium (para)tungstate
- Reference substance name:
- Ammonium paratungstate
- IUPAC Name:
- Ammonium paratungstate
- Details on test material:
- - Name of test material (as cited in study report): Ammonium Paratungstate (CAS# as cited in study: 12028-06-7)
- Physical state: White powder
- Analytical purity: >99.9%
- Storage condition of test material: Room temperature
Constituent 1
Constituent 2
Test animals
- Species:
- rabbit
- Strain:
- New Zealand White
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Harlan UK Ltd Bicester, Oxon, England
- Age at study initiation: 10 to 11 weeks
- Weight at study initiation: 2.2 to 2.6 kg
- Housing: Individually in metal cages with perforated floors
- Diet (e.g. ad libitum): STANRAB (P) SQC Rabbit Diet- ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: Acclimated, but period not stated.
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 to 22.5
- Humidity (%): 39 to 56%
- Air changes (per hr): 19
- Photoperiod (hrs dark / hrs light): 12/12 artificial light (0700 - 1900)
IN-LIFE DATES: From: 1998-02-25 To: 1998-02-28
Test system
- Type of coverage:
- semiocclusive
- Preparation of test site:
- shaved
- Vehicle:
- water
- Controls:
- no
- Amount / concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 g of the test substance was applied under a 25 mm x 25 mm gauze pad.
VEHICLE
- Amount(s) applied (volume or weight with unit): 0.5 mL distilled water - Duration of treatment / exposure:
- 4 hours
- Observation period:
- 4 days
- Number of animals:
- 3
- Details on study design:
- TEST SITE
- Area of exposure: Approximately 24 hours prior to application of the test substance, hair was removed with electric clippers from the dorso-lumbar region of each rabbit exposing an area of skin approximately 100 mm x 100 mm.
- Type of wrap if used: Semi-occlusive dressing and gauze pad.
- Each treatment site was covered with "Elastoplast" elastic adhesive dressing for four hours. The animals were not restrained during the exposure period and were returned to their cages immediately after treatment. At the end of the exposure period, the semi-occlusive dressing and gauze pad were removed and the treatment site was washed.
REMOVAL OF TEST SUBSTANCE
- Washing (if done): Washed with warm water (35 degrees C) and area blotted dry with absorbent paper.
- Time after start of exposure: 4 hours
SCORING SYSTEM:
Local dermal irritation was scored according to Draize.
CLINICAL SIGNS:
All animals were observed daily for signs of ill health or toxicity.
DERMAL RESPONSES:
Examination of the treated skin was made on Day 1 (i.e. approximately 60 minutes after removal of the dressings) and on Days 2, 3, and 4 (equivalent to 24, 48 and 72 hours after exposure).
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- erythema score
- Basis:
- mean
- Remarks:
- mean score for all 3 male rabbit
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Remarks on result:
- no indication of irritation
- Remarks:
- No erythema
- Irritation parameter:
- edema score
- Basis:
- mean
- Remarks:
- mean score for all 3 male rabbits
- Time point:
- 24/48/72 h
- Score:
- 0
- Max. score:
- 4
- Remarks on result:
- no indication of irritation
- Remarks:
- No edema
- Irritant / corrosive response data:
- No dermal response to treatment was observed in any animal throughout the study.
- Other effects:
- There were no signs of toxicity or ill health in any rabbit during the observation period.
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- A single semi-occlusive application of Ammonium Paratungstate to intact rabbit skin for four hours elicited no dermal irritation.
- Executive summary:
No skin irritation data of sufficient quality were available specifically on ammonium metatungstate (target substance). However, skin irritation data are available on ammonium paratungstate (source substance), which are used for read-across. Due to similar water solubility for the target substance compared to the source substance, the resulting read-across from the source substance to the target substance is appropriate to estimate of potential toxicity for this endpoint. For more details, refer to the read-across category approach description in the Category section of this IUCLID submission or Annex 3 of the CSR.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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