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.
Guidance on Safe Use
Administrative data
First-aid measures
Inhalation: Mechanical irritation of airways: Remove person from Silica fume exposed areas.
Skin contact: Wash skin with water and/or a mild detergent.
Eye contact: Rinse eyes with water/saline solution. See a physician upon persistent discomfort.
Ingestion: Remove source of further ingestion. See inhalation.
Fire-fighting measures
Silica Fume is not combustible and the dust entails no danger of explosion
Extinguishing media: Not applicable.
Accidental release measures
Avoid handling that generates dust build-up and exposure to silica fume.
Released material should be collected in suitable containers.
Handling and storage
Handling: Avoid dust generation.
Keep away from hydrofluoric acid (HF). Reactions with HF leads to the formation of toxic gases (SiF4).
Storage : -
Transport information
Land transport (UN RTDG/ADR/RID)
- UN number:
- The product is not subject to ADR/RID regulations.
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Inland waterway transport (UN RTDG/ADN(R))
- UN number:
- The product is not subject to ADN(R) regulations.
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Marine transport (UN RTDG/IMDG)
- UN number:
- The product is not subject to IMDG regulations.
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Air transport (UN RTDG/ICAO/IATA)
- UN number:
- The product is not subject to ICAO-TI / IATA regulations.
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Exposure controls / personal protection
Occupational Exposure Limit, Denmark:
Siliciumdioxid-aerosol, respirabel (1994): 2 mg/m3
Stability and reactivity
Chemical stability: Stable
Possibility of hazardous reactions:
Microsilica is soluble in in hydrofluoric acid (HF) forming toxic gas (SiF4). Heating the product above 500°C over a long period of time, will result in transformation from amorphous silicone to solid, cristalline phases (Cristobalite, Tridymite), wich may cause pulmonary fibrosis (silicosis).
Incompatible materials:
hydrogen fluoride; Fluorides; Sodium
Disposal considerations
No specific requirements.
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.
