Product Name: High Dispersion Silica
Chemical Formula: SiO₂
Synonyms: Amorphous Silica, Fumed Silica, Precipitated Silica
Recommended Use: Rubber reinforcement, Paints and Coatings, Plastics, Food Additive (E551), Cosmetics
Manufacturer: Refer to packaging or delivery invoice
Emergency Contact: Local Poison Control Center or Chemical Safety Officer
CAS Number: 112926-00-8 (amorphous), 7631-86-9 (precipitated)
Physical State: Fine white powder
GHS Classification: Not a hazardous substance as supplied
Potential Health Effects: Dust can irritate eyes, skin, and respiratory system. Chronic inhalation can lead to respiratory discomfort.
Label Elements: Pictogram not required, Signal word not needed
Routes of Exposure: Inhalation, Skin and Eye Contact
Target Organs: Lungs, skin, eyes
Potential Environmental Effects: Non-toxic, but large amounts may alter soil or water physical characteristics
Chemical Name: Silicon dioxide
Concentration: >98% SiO₂
Impurities: Trace sodium, aluminum, iron oxides (typically <1%)
Stabilizers/Additives: None typically present
Form: Amorphous, high surface area powder
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, lift eyelids occasionally, seek medical help if irritation continues
Skin Contact: Brush off excess dust, wash gently with soap and water, remove contaminated clothing
Inhalation: Move to fresh air, keep at rest, symptoms usually resolve after exposure removal; medical attention recommended for persistent coughing
Ingestion: Rinse mouth, drink water to dilute, no serious harm anticipated from small amounts; get medical advice if symptoms arise
Notes to Physician: Treat symptomatically
Flammability: Product does not burn
Extinguishing Media: Use water spray, foam, dry chemical, or carbon dioxide for surrounding fire
Specific Hazards: Product will not contribute to fire, no hazardous decomposition expected
Protective Equipment for Firefighters: Standard firefighting gear, avoid dust generation
Explosion Risk: Fine dust may form explosive mixtures with air in rare circumstances, use adequate ventilation or containment
Combustion Products: None expected
Protective Measures: Wear eye protection, dust mask (P2 or N95), gloves
Spill Response: Avoid dust formation, use industrial vacuum or wet methods to clean up
Environmental Precautions: Prevent bulk discharge into drains or surface water
Personal Precautions: Avoid breathing dust, ventilate area
Waste Handling: Keep waste in sealed containers for disposal or reuse
Handling: Use local exhaust ventilation to minimize dust, avoid skin and eye contact, keep containers tightly closed
Storage Conditions: Store in a dry, cool, well-ventilated place, humidity can cause product to cake or clump
Incompatibility: Strong acids or bases may attack product under certain conditions
Technical Measures: Minimize airborne dust using enclosures and local exhaust, use sealed transfer systems when possible
Occupational Exposure Limits: OSHA PEL (Respirable): 6 mg/m³; ACGIH TLV: 10 mg/m³ (total dust)
Engineering Controls: Local exhaust ventilation, dust collection systems, process enclosure
Personal Protection:
Respiratory: NIOSH-approved dust mask or respirator
Eyes: Chemical safety goggles
Skin: Gloves, long-sleeved work clothes
Hygiene: Wash hands and face after use
Environmental Controls: Avoid release to environment, provide containment if risk of high volumes
Appearance: White, fluffy powder
Odor: Odorless
pH (suspension): 3.5–10.5 (varies with grade and water quality)
Melting Point: >1600°C
Boiling Point: Not applicable
Flash Point: Not applicable
Density: 2.1–2.2 g/cm³ (bulk density much lower, 40–100 kg/m³ for fumed types)
Solubility: Insoluble in water and most solvents
Vapor Pressure: Not applicable
Partition Coefficient (n-octanol/water): Not available
Auto-ignition Temperature: Not applicable
Chemical Stability: Stable under normal conditions
Reactions: Reacts with hydrofluoric acid, producing hazardous silicon tetrafluoride
Hazardous Decomposition Products: Not expected under normal conditions
Conditions to Avoid: Excessive moisture, sources of strong mineral acids or alkalis
Polymerization: Will not occur
Acute Toxicity: LD50 oral (rat): >5000 mg/kg, considered non-toxic by ingestion
Chronic Effects: Not listed as a carcinogen; no evidence of mutagenicity or reproductive toxicity
Inhalation: Persistent or excessive dust exposure may cause respiratory tract irritation, cough, or shortness of breath
Skin/Eye Contact: Mechanical irritation only
Sensitization: Not expected
Medical Conditions Aggravated: Pre-existing lung conditions (asthma, bronchitis) may be worsened by high dust concentrations
Ecotoxicity: Not hazardous to aquatic environments, no significant bioaccumulation
Persistence and Degradability: Exists in environment as a mineral, does not degrade
Mobility in Soil: Very low mobility, stays in topsoil
Other Adverse Effects: High concentrations may cause pH variations in small bodies of water or impact aquatic habitat by sedimentation
Disposal Method: Dispose in accordance with local, regional, and national regulations as non-hazardous solid waste
Packaging Disposal: Contaminated packaging can be landfill disposed or recycled if permitted, rinse before reuse
Recycling: Possible through industrial reprocessing if purity is adequate
Precautions: Avoid generation of airborne dust during disposal
Transport Regulation: Not classified as dangerous goods for transport (ADR, DOT, IMDG, IATA)
UN Number: Not allocated
Proper Shipping Name: Silicon dioxide
Packing Group: Not regulated
Special Precautions: Minimize dust emission during loading/unloading
Environmental Hazards: No special hazards identified
Transport in Bulk: Check compatibility for container material, avoid moisture entry
OSHA: Not regulated as hazardous; general dust limits apply
TSCA: Listed
REACH: Registered; not classified as hazardous under Regulation (EC) 1272/2008
SARA Title III: Not subject to reporting
California Proposition 65: Not listed as a chemical known to cause cancer or reproductive toxicity
WHMIS: Not controlled under WHMIS
Other Regulation: EINECS listed (231-545-4), complies with most major national inventories
