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Product Name: Calcium Silicate
Chemical Formula: Ca2SiO4 or CaSiO3, depending on grade
Trade Names: Insulation Board, Calcium Silicate Block, Pipe Insulation
Synonyms: Calcium orthosilicate, Dicalcium Silicate
CAS Number: 1344-95-2
Recommended Use: High-temperature insulation, construction material, fireproofing agent
Manufacturer Contact: Listed on supplier documentation — includes address, emergency phone number, email contact.
GHS Classification: Not classified as hazardous under GHS for most forms, but dust may present a hazard
Health Hazards: Inhalation of dust can irritate respiratory tract; direct contact may cause mild skin or eye irritation
Physical Hazards: Non-flammable under normal conditions; may become slippery when wet
Environmental Hazards: Not considered toxic to aquatic life, but spilled materials can raise pH in water
Label Elements: No pictogram generally required; signal word “Warning” in case of high dust concentrations
Precautionary Statements: Avoid breathing dust; wash thoroughly after handling; use in well-ventilated area; wear appropriate PPE.
Main Ingredient: Calcium Silicate — concentration typically 90% or higher
Other Ingredients: May contain trace silica < 1%, magnesium oxide, minor mineral admixtures
Impurities: May hold small quantities of quartz, alumina, and iron oxides depending on raw sources
Form: Solid boards, powder, or block forms, white to off-white
Active Components: Only calcium silicate considered hazardous in particulate form due to dust inhalation risks.
Inhalation: Move person to fresh air; loosen tight clothing; seek medical attention if coughing or lung irritation continues
Eye Contact: Rinse eyes thoroughly with plenty of water for several minutes; remove contact lenses if present and easy to do; get medical attention for persistent irritation
Skin Contact: Wash skin with soap and water; remove contaminated clothing; seek medical attention for any persistent rash or discomfort
Ingestion: Rinse mouth thoroughly, do not induce vomiting, seek medical advice especially if large amount swallowed
Most Important Symptoms: Dust exposure can lead to eye watering, sore throat, sneezing; rare cases of chronic lung irritation if exposure continues over time.
Flash Point: Not applicable — inorganic, not combustible
Extinguishing Media: Use water spray, foam, dry chemical, or CO2 for surrounding fire; calcium silicate itself does not burn
Special Hazards: May form slippery paste on fire-exposed surfaces if water used in large volumes
Protective Equipment: Use standard fire-fighting gear; wear respirator if large amounts of dust released
Decomposition Products: High temperature exposure (over 950°C) may release calcium oxide and silicon dioxide particulates.
Personal Precautions: Use dust mask, gloves, goggles; ventilate affected area
Environmental Precautions: Prevent material from entering drains or watercourses in powder form; sweep up carefully
Methods for Clean Up: Scoop or sweep spilled material into suitable container for disposal; use wet method to minimize dust generation for powder spills; wash residue away with water if safe
Disposal: Refer to local regulations for proper disposal methods; do not release large quantities into sewage systems.
Safe Handling Tips: Avoid actions that create airborne dust; use local exhaust or general ventilation systems; handle with gloves and eye protection
Storage Conditions: Store in dry, cool, well-ventilated area; keep bags, boards, or drums sealed and properly labeled; avoid contact with acids to prevent release of silica and potential corrosive byproducts
Incompatibilities: Store away from strong acids (such as hydrochloric or sulfuric) to prevent chemical reaction; keep away from moisture in storage to prevent clumping and caking of powders
Other Advice: Rotate stock and use oldest material first to prevent product deterioration; keep work areas clean.
Occupational Exposure Limits: ACGIH TLV for total nuisance dust: 10 mg/m3 (8-hour TWA); OSHA PEL: 15 mg/m3 (total dust), 5 mg/m3 (respirable dust)
Engineering Controls: Use enclosed processes, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended limits
Personal Protection: Safety glasses or chemical goggles for eye protection; gloves to avoid skin irritation; NIOSH-approved particulate respirator for airborne dust; protective clothing to reduce dust contamination of skin and personal clothing
Hygiene Measures: Wash hands and exposed skin before eating, drinking, smoking, or using restroom; launder contaminated clothing before reuse.
Appearance: White or off-white solid (powder, board, or block); odorless
Melting Point: Above 1500°C
Boiling Point: Not applicable (decomposes at high temperatures)
Density: 2.5–2.9 g/cm³ (varies with porosity and composition); bulk density of insulation board ranges 200–300 kg/m³
pH (10% slurry): Typically 9–11
Solubility: Insoluble in water; very slightly soluble in strong acids
Vapor Pressure: Not applicable
Evaporation Rate: Not applicable
VOC Content: None (inorganic material).
Chemical Stability: Stable under normal conditions of storage and use
Reactive Conditions: Reacts with strong acids, forming soluble calcium salts and silica gel; may form calcium oxide at extremely high temperatures
Hazardous Decomposition: No hazardous polymerization; no dangerous fumes under typical use
Incompatible Materials: Strong acids, ammonium salts, concentrated phosphate fertilizers
Other Notes: Dust may cake or harden if exposed to prolonged moisture, causing equipment blockages in some applications.
Acute Toxicity: Oral and dermal toxicity considered low; most reports focus on mechanical irritation
Inhalation Risks: Dust may irritate upper respiratory tract; prolonged or repeated inhalation can cause chronic respiratory symptoms
Skin Effects: Prolonged contact might cause drying or mild irritation
Eye Effects: Dust particles may mechanically irritate or inflame tissue
Chronic Toxicity: No evidence of carcinogenicity; some calcium silicate products might contain trace amounts of crystalline silica, which has health risks if inhaled over time
Medical Conditions Aggravated by Exposure: Asthma, pre-existing lung conditions, or chronic respiratory issues.
Ecotoxicity: Not toxic to fish or aquatic organisms at typical concentrations; high pH from large spills could disrupt aquatic habitats
Mobility: Immobile in soil and water in solid forms
Persistence and Degradability: Inorganic — does not biodegrade but will break down into calcium and silicate ions
Bioaccumulation: Not expected to accumulate in biota
Other Environmental Effects: May temporarily increase alkalinity if dumped into waterways in large quantities; lawful disposal prevents negative ecosystem impacts.
Waste Handling: Manage as non-hazardous solid waste unless contaminated with hazardous materials
Disposal Procedures: Dispose of according to local, regional, and national regulations; use approved landfill or recycling where available
Recycling Potential: Some large pieces or uncontaminated forms may be reprocessed or reused in building materials
Container Management: Rinse and recycle containers if permitted; do not reuse container for other chemicals
Safety Precautions: Avoid dust creation during disposal activities; workers should wear appropriate protection.
Disposal of Large Quantities: Seek advice from local waste management professionals, especially for bulk disposal.
UN Number: Not regulated as a dangerous good for transport
Transport Hazard Class: Non-hazardous
Packing Group: Not assigned
Proper Shipping Name: Calcium Silicate Material
Environmental Hazards: None expected during normal transport
Special Precautions: Avoid spillage; use covers to prevent wind-blown dust during loading/unloading; secure containers to prevent movement or release.
Regulatory Transport Codes: Not classified under ADR, RID, IMDG, or IATA guidelines.
Safety, Health, and Environmental Regulations: OSHA does not regulate calcium silicate as a hazardous substance unless containing more than 1% crystalline silica; EH40/2005 Workplace Exposure Limits in the UK apply for dust exposure
Label Requirements: Make sure packaging displays identity, hazard warnings, manufacturer contact, and emergency numbers according to local law
Chemical Inventories: Listed in TSCA (United States), EINECS (European Union), AICS (Australia), DSL (Canada) as a simple calcium silicate ingredient
Other Compliance: Follow local occupational exposure and environmental protection regulations; consult REACH dossiers in the EU for specific supplier data; safety data sheet references must remain accessible to exposed workers.
Additional Notes: Employers need to provide training for employees exposed to mineral dusts, and regular health surveillance may help in industries with repeated exposure risk.
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
