© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Product Name: Magnesium Sulfate Heptahydrate
Synonyms: Epsom Salt, Magnesium Sulfate 7-hydrate, MgSO₄·7H₂O
Chemical Formula: MgSO₄·7H₂O
CAS Number: 10034-99-8
Recommended Use: Laboratory chemicals, agricultural use, medical use as laxative and electrolyte replenisher, food additive, water treatment
Supplier Information: Name, address, emergency contact number, customer service number
GHS Classification: Not classified as hazardous according to OSHA Hazard Communication Standard
Health Hazards: May cause eye, skin, and respiratory irritation with prolonged exposure; swallowing large amounts may lead to gastrointestinal discomfort
Environmental Hazards: Not expected to be environmentally hazardous in typical usage and quantities
Signal Word: None
Hazard Statements: May cause slight irritation to eyes, skin, and respiratory tract
Pictograms: None required
Precautionary Statements: Avoid creating dust, use with adequate ventilation, wash thoroughly after handling, avoid contact with eyes
Substance: Magnesium Sulfate Heptahydrate
Chemical Formula: MgSO₄·7H₂O
CAS Number: 10034-99-8
Concentration: Pure, typically >99%
Impurities: Trace amounts of magnesium sulfate monohydrate or anhydrous forms may be present, but not in significant concentrations
Eye Contact: Flush eyes with water, remove contact lenses if present, continue rinsing for several minutes; seek medical attention if irritation persists
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water; medical attention if irritation develops
Ingestion: Rinse mouth, seek medical advice if large amounts swallowed or discomfort occurs
Inhalation: Move to fresh air, support breathing as needed, seek medical attention if symptoms develop
Medical Attention: Symptomatic treatment, no acute toxicity expected from typical exposure but large amounts may cause adverse effects due to magnesium overload
Suitable Extinguishing Media: Water spray, dry chemical, carbon dioxide, foam
Unsuitable Extinguishing Media: None known
Hazards from Combustion: Product does not burn but may release sulfur oxides if heated beyond decomposition
Protective Equipment: Firefighters should wear standard protective gear and self-contained breathing apparatus to avoid irritation from dust or decomposition products
Advice for Firefighters: Use water spray to keep containers cool, contain runoff to prevent environmental release, avoid inhaling fumes and dust in confined spaces
Personal Precautions: Avoid contact with skin and eyes, wear appropriate gloves, goggles, and dust mask
Environmental Precautions: Prevent large spills from entering waterways, notify authorities if significant release occurs
Clean-Up Procedures: Sweep up material, collect in suitable containers for reuse or disposal, wash area with water to remove residue, use non-sparking tools if dust present
Containment: Gather up dry spills to minimize dust generation, clean up promptly to avoid slipping hazard
Precautions for Safe Handling: Use in well-ventilated area, avoid breathing dust, minimize dust generation, avoid contact with eyes and skin, wash hands after handling
Conditions for Safe Storage: Store in tightly closed container, in cool, dry, well-ventilated area, keep away from incompatible materials such as strong acids and bases
Specific End Uses: As per identified uses, follow standard laboratory, agricultural, or pharmaceutical procedures for handling bulk mineral salts
Exposure Limits: No occupational exposure limits established for this compound
Engineering Controls: Use local exhaust ventilation if handling large quantities that could create dust, standard laboratory ventilation is adequate for most applications
Personal Protective Equipment: Safety glasses with side shields, chemical-resistant gloves, protective clothing, dust mask or respirator if airborne exposure possible
Hygiene Measures: Wash hands thoroughly after handling, remove contaminated clothing and wash before reuse, do not eat or drink while working with product
Appearance: White crystalline solid or powder
Odor: Odorless
Molecular Weight: 246.47 g/mol
Solubility: Freely soluble in water
Melting Point: Decomposes at approx. 150°C, loses water of hydration
Boiling Point: Not applicable
Density: Approximately 1.68 g/cm³
pH: 5.0–9.2 (solution in water)
Vapor Pressure: Not significant
Flash Point: Not flammable
Other Properties: Hygroscopic, easily absorbs moisture from air, efflorescent in dry air
Chemical Stability: Stable under recommended storage conditions, can lose water if exposed to air
Reactivity: Low reactivity, does not oxidize or reduce under normal conditions
Conditions to Avoid: Excessive heat, exposure to air or moisture for extended periods
Incompatible Materials: Strong acids and bases, reactive alkali metals
Hazardous Decomposition: Sulfur oxides and magnesium oxide fumes if strongly heated or decomposed
Polymerization: Does not occur under normal industrial use
Routes of Exposure: Eye and skin contact, inhalation of dust, ingestion
Acute Toxicity: Low oral toxicity, large doses may cause diarrhea, abdominal pain, nausea due to osmotic effects of magnesium salts
Skin and Eye Contact: Can cause mild irritation with prolonged or repeated exposure
Inhalation: Dust may cause mild respiratory tract irritation
Chronic Effects: No known long-term hazards at normal environmental or workplace concentrations
Sensitization: Not known to cause allergy or sensitization
Carcinogenicity, Mutagenicity, Reproductive Toxicity: Not classified based on current data
Toxicity to Aquatic Life: Low toxicity, magnesium and sulfate ions are natural components of many water bodies
Persistence and Degradability: Highly soluble, dissociates to ions in water
Bioaccumulative Potential: Not expected to bioaccumulate
Mobility in Soil: Easily moves through soil with water, may contribute to soil salinity in large quantities
Other Harmful Effects: No significant adverse environmental impacts reported at expected use; large spills can alter local water chemistry
Waste Treatment Methods: Dispose of in accordance with local, regional, and national regulations; for small amounts, can usually be disposed of in general waste or via dilution with water
Recycling: Not usually recycled; land application sometimes permitted for agricultural grades
Environmental Release: Minimize release to the environment, particularly to waterways; avoid disposing large quantities to surface water
UN Number: Not regulated as a dangerous good under transport regulations
Proper Shipping Name: Magnesium Sulfate Heptahydrate
Transport Hazard Class: None
Packing Group: None required
Environmental Hazards: Not a marine pollutant
Special Transport Precautions: Keep containers sealed and dry, stack securely to avoid tipping or breakage
Inventory Status: Listed on TSCA, EINECS, DSL, and other international chemical inventories
OSHA: Not classified as hazardous under OSHA regulations
SARA Title III: Not subject to reporting under SARA Title III Sections 302/304/313
California Proposition 65: Not listed
Other Regulatory Information: Product meets relevant food, agricultural, or pharmaceutical standards if manufactured accordingly; consult regulatory guidelines for use in drinking water or as food additive
