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EC number: 234-909-0 | CAS number: 12039-88-2
- 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
Flammability
Administrative data
- Endpoint:
- flammable solids
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.6315 (Flammability)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.10 (Flammability (Solids))
- GLP compliance:
- yes
Test material
- Reference substance name:
- Tungsten disilicide
- EC Number:
- 234-909-0
- EC Name:
- Tungsten disilicide
- Cas Number:
- 12039-88-2
- Molecular formula:
- Si2W
- IUPAC Name:
- Tungsten disilicide
- Test material form:
- solid: particulate/powder
Constituent 1
- Specific details on test material used for the study:
- Batch number: 171130
Results and discussion
Flammable solids
- Test procedure:
- burning rate test: preliminary screening test
- Remarks on result:
- other: combustion along the powder train was observed only up to 12 cm within 4 minutes
Any other information on results incl. tables
The test item was filled into a mould of 250 mm length, with a triangular cross-section of 10 mm inner height and 20 mm width. On both the sides of the mould, in a longitudinal section two metal plates were mounted as lateral limitations that projected 2 mm beyond the upper edge of the triangular cross-section. The mould was dropped thrice from a height of 2 cm onto a solid surface. The mould was filled up with the test item again. The lateral limitations were then removed and the excess test item was scraped off. A non-combustible, non-porous and low heat-conducting base plate (ceramic tile) was placed on top of the mould and the apparatus was inverted and the mould was removed. A hot flame from the gas burner (diameter of the burner, 25 mm) was applied to one end of the powder train for a period of two minutes (maximum period). But it was observed that the test item powder train ignited after 2 seconds of application of the hot flame from the gas burner but the test item failed to burn the specified distance of 200 mm and just a linear, gentle (non-vigorous) combustion along the powder train was observed up to 12 cm within four minutes of total testing period after the withdrawal of flame (flame withdrawn after 2 minutes).
Also there was no smoldering observed up to a distance 200 mm within 4 minutes of total testing period after the withdrawal of flame.
Applicant's summary and conclusion
- Interpretation of results:
- not classified based on GHS criteria
- Conclusions:
- Tungsten disilicide is not flammable.
- Executive summary:
In the 'Preliminary Screening Test', ignition of the test item powder train was observed after 2 seconds of application of the hot flame from the gas burner but the test item failed to burn the specified distance of 200 mm and a linear, gentle (non-vigorous) combustion along the powder train was observed only up to 12 cm within 4 minutes of total testing period after the withdrawal of flame (flame withdrawn after 2 minutes). Also there was no smoldering observed up to a distance 200 mm within four minutes of total testing period after the withdrawal of flame.
Although the test item powder-train readily ignited, it failed to burn the entire specified distance of 200 mm along the powder train and moreover, as there was no smouldering observed up to the specified distance of 200 mm along the powder train within 4 minutes of total testing period after the withdrawal of flame, tungsten disilicide is considered to be not flammable.
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