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Product Name: Magnesium Carbonate
Chemical Formula: MgCO3
Synonyms: Magnesite, Neutral Magnesium Carbonate
CAS Number: 546-93-0
Intended Use: Laboratory, industrial, and consumer applications
Supplier: Chemical manufacturers and major laboratory supply companies
Contact Information: See supplier details on packaging for emergency numbers and addresses
GHS Classification: Not classified as hazardous under GHS guidelines
Physical Hazards: Dust can cause mechanical irritation to eyes and respiratory tract
Health Hazards: Prolonged inhalation may cause mild respiratory irritation; ingestion of large quantities could result in gastrointestinal discomfort
Environmental Hazards: No significant environmental effects reported under normal conditions
Chemical Name: Magnesium Carbonate
Common Formulation: Pure magnesium carbonate; in some industrial sources may be mixed with trace impurities
Percentage: Magnesium carbonate content typically exceeds 95%; remaining percentage includes moisture and trace minerals
Molecular Weight: 84.31 g/mol
Inhalation: Move to fresh air. Seek medical attention if respiratory symptoms persist
Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing
Eye Contact: Rinse cautiously with water for several minutes, lifting eyelids occasionally
Ingestion: Rinse mouth with water; do not induce vomiting; consult a physician if large quantity is swallowed
Flammability: Not flammable
Suitable Extinguishing Media: Use media appropriate for surrounding fire, such as water spray, dry chemical, foam, or carbon dioxide
Special Hazards: Heating above decomposition releases carbon dioxide gas
Protective Equipment: Firefighters wear full protective gear including self-contained breathing apparatus
Advice: Magnesium carbonate itself does not support combustion but can contribute to dust clouds if disturbed
Personal Precautions: Wear dust mask, gloves, eye protection; ventilate area if release occurs indoors
Environmental Precautions: Avoid uncontrolled release to sewers or waterways
Cleanup Methods: Sweep up avoiding dust generation; collect material into labeled containers for disposal or reuse
Decontamination: Rinse affected area with water after cleanup
Handling: Use local exhaust ventilation to limit exposure to airborne dust; avoid contact with eyes and skin
Storage: Store in tightly closed containers away from moisture, acids, and incompatible substances
Incompatibles: Strong acids, ammonium salts
Packaging: Prefer polypropylene, fiber drums, or similar containers resistant to chemicals and moisture
Occupational Exposure Limits: OSHA PEL (total dust) 15 mg/m3, ACGIH TLV-TWA 10 mg/m3 (inhalable dust)
Engineering Controls: General or local exhaust ventilation
Personal Protective Equipment: Dust mask or respirator if airborne concentrations exceed exposure limits; safety glasses; gloves; protective clothing
Hygiene Measures: Wash hands thoroughly after handling; keep work area clean
Appearance: White, odorless, tasteless fine powder
Melting Point: Decomposes above 350°C, releasing carbon dioxide
Boiling Point: Not applicable
Density: About 2.96 g/cm3
Solubility: Practically insoluble in water; soluble in acids with effervescence
pH: Weakly alkaline (10% slurry in water gives pH around 10.5)
Odor: Odorless
Other Data: Nonvolatile, stable under ambient conditions
Chemical Stability: Stable under normal temperatures and pressures when sealed
Hazardous Decomposition: Heating above decomposition point releases carbon dioxide
Reactivity: Reacts with acids to produce carbon dioxide
Incompatible Materials: Strong acids, strong oxidizers, ammonium salts
Polymerization: Will not occur
Acute Toxicity: No significant acute toxicity in animal studies; LD50 for rats >5000 mg/kg (oral)
Chronic Effects: No evidence of carcinogenicity, mutagenicity, or reproductive toxicity
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Symptoms: Dust may cause coughing or mild throat irritation; ingestion of large amounts can lead to mild digestive upset
Medical Conditions Aggravated: Pre-existing respiratory ailments
Ecotoxicity: Considered non-toxic for aquatic and terrestrial organisms under normal use
Mobility in Soil: Low, negligible leaching due to insolubility in water
Persistence and Degradability: Stable, will persist unless acid conditions cause decomposition
Bioaccumulation: No tendency to bioaccumulate
Waste Management: Dispose according to local, regional, national, and international regulations
Method: Large quantities can often be recycled or reclaimed. Small quantities can be landfilled in accordance with regulations
Precautions: Do not discharge into drains or waterways
Proper Shipping Name: Magnesium Carbonate
UN Number: Not regulated as a hazardous material for transport
Transport Hazard Class: Not assigned
Packing Group: Not applicable
Special Precautions: Avoid creating dust during handling and transport
Label Requirements: None required under GHS for magnesium carbonate
Risk Phrases: None assigned
SARA Title III – Section 313: Not listed
TSCA: Listed in the US Toxic Substances Control Act Inventory
Other Regulations: EU REACH Registered, listed on Canadian DSL, Australian AICS, and other major chemical inventories
