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EC number: 231-545-4 | CAS number: 7631-86-9
- 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
PBT assessment
Administrative data
PBT assessment: overall result
- Name:
- synthetic amorphous silica, nanostructured material_Set 1
- Type of composition:
- boundary composition of the substance
- State / form:
- solid: nanoform
- Reference substance:
- synthetic amorphous silica, nanostructured material_Set 1
- Type of information reported:
- set of nanoforms
- Name of set of nanoforms:
- Snythetic amorphous silicon dioxide, nanostructured material_Set1
- Reason / purpose:
- justification for reporting set of similar nanoforms
- Shape category:
- spheroidal
- Shape:
- other: 3-dimensional branched fractal aggregates
- Pure shape:
- yes
- Range:
- >= 99 - <= 100 %
- Shape category:
- spheroidal
- Percentile:
- D10
- Range:
- >= 1 - <= 100 nm
- Percentile:
- D50
- Range:
- >= 1 - <= 100 nm
- Percentile:
- D90
- Range:
- >= 1 - <= 100 nm
- Additional information:
- The particle forming mechanism for each manufacturing process starts with the formation of liquid nuclei that grow to constituent particles that coagulate to aggregates and solidify. Constituent particles are therefore spherical in nature while aggregates (and agglomerates) show a high fractal structure.
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - <= 100 %
- Structure:
- amorphous
- Name:
- amorphous
- Pure structure:
- yes
- Range:
- > 99.7 - <= 100 %
- Description:
- X-ray diffraction diagrams of SAS, show only a broad halo, revealing an X-ray amorphous structure. The detection limit for crystallinity by X-ray is in the maximum order of 0.3% by weight or below.
- Range of specific surface area:
- >= 4 - <= 1 000 m²/g
- Range of volume specific surface area:
- >= 8.8 - <= 2 200 m²/cm³
- Skeletal density:
- >= 1.7 - <= 2.25 g/cm³
- Surface treatment applied:
- no
- Name:
- synthetic amorphous silicon dioxide gel precipitated [CAS-No. 112926-00-8]
- Type of composition:
- legal entity composition of the substance
- State / form:
- solid: nanoform
- Related composition:
- synthetic amorphous silica, nanostructured material_Set 1
- Reference substance:
- synthetic amorphous silicon dioxide gel precipitated [CAS-No. 112926-00-8]
- Type of information reported:
- set of nanoforms
- Name of set of nanoforms:
- Synthetic amorphous silicon dioxide, nanostructured material_Set 1
- Shape category:
- spheroidal
- Shape:
- spherical
- Pure shape:
- yes
- Range:
- >= 99 - <= 100 %
- Shape category:
- spheroidal
- Percentile:
- D10
- Range:
- >= 2 - <= 25 nm
- Percentile:
- D50
- Range:
- >= 2.5 - <= 50 nm
- Percentile:
- D90
- Range:
- >= 3.5 - <= 70 nm
- Additional information:
- The particle forming mechanism for each manufacturing process starts with the formation of liquid nuclei that grow to constituent particles that coagulate to aggregates and solidify. Constituent particles are therefore spherical in nature while aggregates (and agglomerates) show a high fractal structure.
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - <= 100 %
- Structure:
- amorphous
- Name:
- amorphous
- Pure structure:
- yes
- Range:
- > 99.7 - <= 100 %
- Description:
- X-ray diffraction diagrams of SAS, show only a broad halo, revealing an X-ray amorphous structure. The detection limit for crystallinity by X-ray is in the maximum order of 0.3% by weight or below.
- Range of specific surface area:
- >= 4 - <= 800 m²/g
- Range of volume specific surface area:
- >= 8.8 - <= 1 760 m²/cm³
- Skeletal density:
- ca. 2.2 g/cm³
- Surface treatment applied:
- no
- Name:
- synthetic amorphous silicon dioxide, fumed [CAS-No. 112945-52-5]
- Type of composition:
- legal entity composition of the substance
- State / form:
- solid: nanoform
- Related composition:
- synthetic amorphous silica, nanostructured material_Set 1
- Reference substance:
- synthetic amorphous silicon dioxide, fumed [CAS-No. 112945-52-5]
- Type of information reported:
- set of nanoforms
- Name of set of nanoforms:
- Synthetic amorphous silicon dioxide, nanostructured material_Set 1
- Shape category:
- spheroidal
- Shape:
- spherical
- Pure shape:
- yes
- Range:
- >= 99 - <= 100 %
- Shape category:
- spheroidal
- Percentile:
- D10
- Range:
- >= 2 - <= 25 nm
- Percentile:
- D50
- Range:
- >= 2.56 - <= 50 nm
- Percentile:
- D90
- Range:
- >= 3.5 - <= 70 nm
- Additional information:
- The particle forming mechanism for each manufacturing process starts with the formation of liquid nuclei that grow to constituent particles that coagulate to aggregates and solidify. Constituent particles are therefore spherical in nature while aggregates (and agglomerates) show a high fractal structure.
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - <= 100 %
- Structure:
- amorphous
- Pure structure:
- yes
- Range:
- > 99.7 - <= 100 %
- Description:
- X-ray diffraction diagrams of SAS, show only a broad halo, revealing an X-ray amorphous structure. The detection limit for crystallinity by X-ray is in the maximum order of 0.3% by weight or below.
- Range of specific surface area:
- >= 50 - <= 400 m²/g
- Range of volume specific surface area:
- >= 110 - <= 880 m²/cm³
- Skeletal density:
- ca. 2.2 g/cm³
- Surface treatment applied:
- no
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Annex XIII sets out the criteria for the identification of persistent, bioaccumulative and toxic (PBT) substances, and very persistent and very bioaccumulative (vPvB) substances; it does not apply to inorganic substances.
Referenceopen allclose all
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.