Registration Dossier
Registration Dossier
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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.
Nanomaterial agglomeration / aggregation
Administrative data
- Endpoint:
- nanomaterial agglomeration/aggregation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 000
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Analysis by high-resolution transmission electron microscopy (HR-TEM)
- GLP compliance:
- no
- Type of method:
- transmission electron microscopy
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
- Details on test material:
- - Name of test material (as cited in study report): high grade silica fume; low grade silica fume
- Analytical purity: high grade: SiO2 96.4% (w/w); low grade: SiO2 83.8% (w/w)
Constituent 1
Results and discussion
Agglomerate / aggregate diameter
- Remarks on result:
- other: see "Remarks"
- Remarks:
- Primary silica fume particles are in the size range of 0.02 - 1.0 µm (average particle size 0.15 µm). During collection, cooling and bagging, primary silica fume particles form larger agglomerates, i.e. assemblies of particles attached to each others due to physical interaction (e.g., van der Waals forces)
Any other information on results incl. tables
Primary silica fume particles are in the size range of 0.02 - 1.0 µm (average particle size 0.15 µm).
During collection, cooling and bagging, primary silica fume particles form larger agglomerates, i.e. assemblies of particles attached to each others due to physical interaction (e.g., van der Waals forces) (see attached figure).Applicant's summary and conclusion
- Conclusions:
- Primary silica fume particles are in the size range of 0.02 - 1.0 µm (average particle size 0.15 µm).
During collection, cooling and bagging, primary silica fume particles form larger agglomerates, i.e. assemblies of particles attached to each others due to physical interaction (e.g., van der Waals forces) (see attached figure).
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