Product Name: Magnesium Carbonate
Chemical Formula: MgCO3
CAS Number: 546-93-0
Synonyms: Magnesite, Carbonic acid magnesium salt
Recommended Uses: Drying agent, filler in rubber and plastics, antacid, fireproofing, personal care
Manufacturer Information: Common in chemical supply chains, typically distributed by chemical providers globally
Emergency Contact: National emergency chemical hotline, local safety officer contact
GHS Classification: Not classified as hazardous under GHS system
Health Hazards: Dust may cause mild nose, throat, or lung irritation; rare eye or skin irritation with prolonged contact
Environmental Hazards: Low environmental hazard profile; minimal water impact
Signal Word: None required
Pictograms: None required
Precautionary Statements: Avoid breathing dust; wash skin after handling; avoid contact with eyes
Chemical Identity: Magnesium Carbonate
Concentration: 98-100%
Impurities: Traces of calcium carbonate, iron oxide, or silica possible depending on source
Molecular Weight: 84.31 g/mol
Physical State: Solid, powder
Inhalation: Take individual to fresh air; encourage normal breathing; seek medical attention if respiratory discomfort persists
Skin Contact: Rinse exposed area with water; use soap if irritation appears; medical advice rarely needed
Eye Contact: Rinse shy of 15 minutes with water; lift eyelids; remove contact lenses; consult doctor if irritation lingers
Ingestion: Rinse mouth; drink clean water; seek a healthcare professional if symptoms show
Important Symptoms: Irritation, coughing, sneezing, rarely redness of eyes/skin
Special Note: Medical attention typically unnecessary for minor exposure
Suitable Extinguishing Media: Foam, dry chemical, CO2, water spray
Special Hazards: Product itself does not burn; possible release of carbon dioxide in intense fire
Protective Equipment for Firefighters: Standard fire gear, breathing apparatus for conditions with heavy smoke
Decomposition Products: Magnesium oxide, carbon dioxide at high temperature
Firefighting Instructions: Keep containers cool with water spray, remove containers from fire area if safe
Personal Precautions: Minimize dust formation; wear dust protection mask (P2 rating), gloves
Environmental Precautions: Avoid letting large volumes enter water courses
Cleanup Methods: Sweep up, shovel into containers; avoid dry sweeping if dust is present; use industrial vacuum or wet methods; wash spill area after collection
Disposal Considerations: Collect for reuse or disposal in accordance with local regulation
Handling: Work in ventilated spaces; avoid breathing dust; use protective equipment; prevent eye and skin contact
Hygiene Measures: Wash thoroughly after use; change contaminated clothing; separate food areas
Storage Conditions: Store dry, cool, well-ventilated; tightly sealed packaging; keep away from strong acids
Storage Stability: Stable under normal ambient conditions
Incompatible Materials: Strong acids (releases CO2 gas), ammonium salts
Occupational Exposure Limits: OSHA PEL (Particulates Not Otherwise Regulated): 15 mg/m3 (total dust); 5 mg/m3 (respirable fraction)
Ventilation: Local exhaust or general ventilation in high-dust operations
Eye Protection: Safety glasses with side shields or goggles
Hand Protection: Standard chemical-resistant gloves
Skin and Body Protection: Normal work clothing, lab coat in high exposure
Respiratory Protection: Dust mask if high airborne concentrations
Environmental Controls: Employ controls to minimize fugitive dust emissions in workplace
Appearance: White, odorless powder or crystals
Odor: None
pH: 9-10 (saturated solution)
Melting Point: Decomposes below 350°C
Boiling Point: Not applicable (decomposes)
Vapor Pressure: Not applicable
Flash Point: Not flammable
Solubility: Slightly soluble in water, insoluble in alcohol
Specific Gravity: 2.9-3.0
Partition Coefficient: Not applicable
Auto-Ignition Temperature: Not applicable
Evaporation Rate: Not applicable
Chemical Stability: Stable at room temperature and pressure
Reactivity: No dangerous reactions under normal conditions
Possibility of Hazardous Reactions: Reacts with strong acids yielding carbon dioxide
Conditions to Avoid: Excess moisture, exposure to acids, extreme heat
Incompatible Materials: Strong acids, ammonium salts
Hazardous Decomposition: Magnesium oxide and carbon dioxide on thermal decomposition
Acute Toxicity: Low; high oral doses may cause mild gastric upset, diarrhea
Skin Contact: Low irritation risk; sensitive skin could show redness after prolonged contact
Eye Contact: May cause slight irritation, watering, or redness
Chronic Effects: Not reported under normal workplace conditions
Inhalation: Dust may irritate lungs and airways if inhaled repeatedly in large quantities
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA
Mutagenicity and Reproductive Toxicity: No evidence of mutagenic or reproductive effects in current literature
Aquatic Toxicity: Minimal impact in typical use levels
Persistence and Degradability: Naturally occurring mineral, dissolves slowly, undergoes mineral cycles
Bioaccumulative Potential: Does not bioaccumulate
Mobility in Soil: Immobile, binds to soil minerals
Other Adverse Effects: No known significant effect in common environmental settings
Disposal Methods: Product landfilled according to regulations; use local landfill or chemical disposal program; consider reuse opportunities if material remains uncontaminated
Small Quantities: Rinse away traces from surfaces in compliance with local waste water standards
Contaminated Packaging: Dispose as non-hazardous waste unless heavily contaminated with dangerous substances
Special Precautions: Prevent dust from spreading during collection and transport
UN Number: Not regulated
Proper Shipping Name: Magnesium Carbonate
Transport Hazard Class: Not classified as dangerous
Packing Group: Not regulated
Environmental Hazards: Not hazardous to groundwater, surface water or air in transport
Special Transport Precautions: No additional transport requirements outside normal protections against loss, dust formation, or sweating
U.S. TSCA: Listed on inventory
EU REACH: Registered/Exempt from registration
SARA Title III: Not subject to reporting
WHMIS (Canada): D2B (irritant dust)
California Prop 65: Not listed
Other International Regulations: Approved for commercial and food additive uses in relevant jurisdictions
Labelling Requirement: Standard workplace labeling with clear product name and hazard communication as per OSHA and GHS guidelines
