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Product Name: Magnesium Sulfate Monohydrate
Chemical Formula: MgSO4·H2O
Synonyms: Epsom salt monohydrate, Sulfuric acid magnesium salt monohydrate
Recommended Uses: Agriculture, laboratory research, chemical manufacturing, pharmaceutical formulations, water treatment, personal care products
Supplier Contact: Refer to label for supplier’s address and emergency phone.
CAS Number: 14168-73-1
GHS Classification: Not classified as hazardous according to OSHA Hazard Communication Standard
Signal Word: None required
Hazard Statements: May cause irritation to eyes, skin, and respiratory system with direct or prolonged exposure; excessive ingestion may cause gastrointestinal irritation
Precautionary Statements: Avoid dust formation; avoid contact with eyes and skin; wash thoroughly after handling; use in well-ventilated areas
Emergency Overview: White crystalline powder; no significant odor; potential for mild irritation upon exposure
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Target Organs: Eyes, skin, gastrointestinal tract, respiratory tract
Chemical Name: Magnesium sulfate monohydrate
Concentration: 100% by weight
Molecular Weight: 138.38 g/mol
Impurities: Commercial grades can contain trace levels of other water-soluble salts
Ingredient Disclosure: Not applicable – single substance
Inhalation: Move person to fresh air; seek medical attention if symptoms like coughing or difficulty breathing persist
Skin Contact: Remove contaminated clothing; rinse affected area with soap and water; seek medical advice if irritation or rash develops
Eye Contact: Rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; continue rinsing; seek medical care if irritation persists
Ingestion: Rinse mouth with water; drink water to dilute; do not induce vomiting unless directed by medical personnel; obtain medical attention if large amounts were swallowed or if symptoms develop
Most Important Symptoms/Effects: Mild irritation and discomfort in eyes, skin, or gastrointestinal tract; no known chronic effects from accidental acute exposure
Flammability: Non-flammable; does not support combustion
Suitable Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide
Hazardous Combustion Products: At high temperatures, may decompose to release sulfur oxides and magnesium oxide
Special Protective Equipment: Firefighters should wear full protective gear and self-contained breathing apparatus if necessary due to toxic gases evolving from decomposition
Unusual Fire & Explosion Hazards: Product decomposes at high temperature but does not produce explosion or violent reaction
Personal Precautions: Avoid contact with eyes and skin; use personal protective equipment such as gloves and goggles; avoid breathing dust
Environmental Precautions: Prevent large quantities from entering drains, watercourses, or soil
Clean-up Procedures: Sweep up gently and collect into suitable containers for recycling or disposal; avoid generating dust; wash spill site with plenty of water once material has been picked up
Reference to Other Sections: For disposal, refer to Section on Disposal Considerations; for required PPE, see Section on Exposure Controls
Safe Handling: Use with adequate ventilation; minimize dust generation; handle with care to prevent spills and exposure
Hygiene Practices: Wash hands thoroughly after handling; do not eat, drink, or smoke while using this substance; avoid unprotected exposure
Storage Conditions: Store in a dry, cool, and well-ventilated area; protect from moisture and humidity; keep container tightly closed when not in use
Incompatible Materials: Strong acids, strong bases, reducing agents; avoid contact with easily oxidizable material
Packaging Materials: Use corrosion-resistant and moisture-proof packaging
Exposure Limits: No OSHA PEL or ACGIH TLV established for this substance
Engineering Controls: Use local exhaust ventilation in industrial settings where dust is generated; keep airborne levels low
Personal Protective Equipment (PPE): Safety goggles for eye protection; gloves made of nitrile, latex, or PVC; protective clothing when handling large volumes; NIOSH-approved dust mask or respirator for dusty environments
Workplace Controls: Facilities should have eyewash stations and showers available
Appearance: White crystalline powder or granules
Odor: Odorless
pH (1% Solution): 5.5 – 7.0
Solubility in Water: Freely soluble, approximately 36 g/100 mL at 20°C
Melting Point: Decomposes at about 150°C; loses water of hydration
Boiling Point: Not applicable; decomposes before boiling
Density: 1.68 g/cm³
Vapor Pressure: Not volatile
Partition Coefficient (n-octanol/water): Not available
Chemical Stability: Stable under standard temperatures and conditions; hygroscopic, absorbs moisture from air
Reactivity: Not reactive with most substances; may react with concentrated acids or strong oxidizers
Hazardous Reactions: None expected under normal processing and storage; avoid mixing with incompatible materials
Decomposition Products: Sulfur oxides, magnesium oxide upon heating or combustion
Polymerization: Will not occur
Acute Toxicity: Oral LD50 for rats approximately 3000 mg/kg; low toxicity by oral intake
Potential Health Effects: Eye and skin: may cause mild irritation or redness on contact; inhalation: large amounts of dust might irritate the respiratory tract; ingestion: large doses can result in diarrhea, stomach upset
Chronic Toxicity: No significant long-term effects reported; no known human carcinogenicity, mutagenicity, or teratogenicity
Sensitization: Not expected to cause allergic reactions
Other Data: Excessive ingestion very unlikely in occupational use, but not recommended due to potential for gastrointestinal distress
Aquatic Toxicity: Moderately soluble and dissociates to magnesium and sulfate ions in water; high concentrations may impact aquatic life, especially in closed systems
Mobility in Soil: High mobility in water; leaches readily into soil from spills
Persistence & Degradability: Inorganic salt, does not degrade; splits into constituent ions
Bioaccumulation: Does not bioaccumulate in organisms; magnesium is a plant nutrient
Additional Ecological Hazards: Unlikely to pose significant environmental hazard in normal usage; avoid uncontrolled releases into water bodies
Waste Disposal Methods: Dispose in accordance with local, state, and federal regulations; product can often be disposed with regular waste unless mixed with hazardous substances
Contaminated Packaging: Empty containers may be recycled after thorough cleaning; containers may be reused for non-food purposes if free of residue
Special Precautions for Landfill or Incineration: No data for incineration hazard as product is non-volatile and inorganic
UN Number: Not regulated as hazardous for transport
Proper Shipping Name: Magnesium sulfate monohydrate
Transport Hazard Class: Not classified as dangerous goods
Packing Group: Not applicable for this material
Special Transport Precautions: Ensure packaging prevents moisture ingress; ship in closed, labeled containers
OSHA Status: Not listed as hazardous
TSCA: Substance is listed on the US TSCA Inventory
SARA Title III: Not subject to reporting under Sections 302, 304, 311/312, 313
California Proposition 65: Not listed as a chemical known to cause cancer or reproductive toxicity
WHMIS (Canada): Not a controlled product
Other Regulatory Info: Check local or country-specific regulations for further compliance; product is widely used and generally regarded as safe for listed applications
