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EC number: 273-761-1 | CAS number: 69012-64-2 Amorphous silicon dioxide particles from the volatilization and vaporization of furnace feed materials in the manufacture of ferrosilicon and silicon.
- 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
Additional physico-chemical information
Administrative data
- Endpoint:
- other: acute and chronic aquatic effects
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- Performing ecotoxicity tests on poorly water soluble substances, and in particular metals and metalloids, can be problematic. Therefore, the Transformation/Dissolution (T/D) protocol is recommended as a first tier for assessing testing requirements (OECD 2001).
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: OECD SERIES ON TESTING AND ASSESSMENT Number 29 GUIDANCE DOCUMENT ON TRANSFORMATION/DISSOLUTION OF METALS AND METAL COMPOUNDS IN AQUEOUS MEDIA
- Principles of method if other than guideline:
- The principle of the T/D protocol is to determine the concentration of metal elements that are released from poorly water soluble substances. These data are then compared with data that are already available for each of the elements to determine if the concentration released is above the concentration expected to cause an effect in the environment.
- GLP compliance:
- yes
Test material
- Reference substance name:
- Fumes, silica
- EC Number:
- 273-761-1
- EC Name:
- Fumes, silica
- Cas Number:
- 69012-64-2
- Molecular formula:
- SiO2
- IUPAC Name:
- silanedione
- Reference substance name:
- silica fume
- IUPAC Name:
- silica fume
- Details on test material:
- Name of test material (as cited in study report high grade and low grade silicon (LGSi)
- Analytical purity: HG Silica Fume: SiO2 > 96 % (w/w) and LG Silica Fume: SiO2 > 96% (w/w)
Constituent 1
Constituent 2
Results and discussion
- Results:
- The data from the 7 day T/D test and from the 28 day T/D test have been compared with the limits recommended in the EU Risk Assessment Reports (RAR). Silica fume (high grade)
appears not to contain any impurities at concentrations that may be expected to cause acute or chronic toxicity to aquatic organisms and therefore they do not require any further ecotoxicity tests for classification purposes. According to the REACH guidance document (section R7.1.7.6), the outcomes of the transformation/dissolution tests are to be used for aquatic classification and labelling purposes and can also be used for the integration of fate parameters into the Predicted Environmental Concentration (PEC) calculations. Silica fume low grade would require further ecotox testing which are ongoing.
Applicant's summary and conclusion
- Conclusions:
- According to the results of the T/D protocol 7 days (acute) and 28 days (chronic) the conclusion is that silica fume high grade is not classified for the environment compartment.
- Executive summary:
The Transformation/Dissolution T/D protocol applicable for poorly water soluble substances, and in particular metals and metalloids, has been performed on Silica Fume for a period of 7 and 28 days representing potential acute and chronic effects respectively. Silica fume (high grade) appears not to contain any impurities at concentrations that may be expected to cause acute or chronic toxicity to aquatic organisms and therefore they do not require any further ecotoxicity tests for classification purposes.
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