Home › Chemicals › Magnesium Sulfate CAS 7487-88-9: Magnesium Sulfate (MgSO4) Identity CAS Number 7487-88-9 Molecular Formula MgSO4 IUPAC Name magnesium sulfate Molecular Weight 120.37 g/mol SMILES [Mg+2].[O-]S(=O)(=O)[O-]Synonyms Epsom salt, bitter salt, MgSO4, magnesium sulfate heptahydrate
2D Structure
Physical Properties Density 2.66 g/mL at 25°C Boiling Point 1124.0°C Melting Point 1124.0°C Flash Point None°C Vapor Pressure 0.0 kPa at 20°C Refractive Index nD = 1.518 Dielectric Constant ε = 11.0
Safety & GHS Classification
Storage: Store in dry, tightly sealed containers. Hygroscopic (heptahydrate form). Very low toxicity — Generally Recognized as Safe (GRAS). Dissolves readily in water.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Good PE Excellent PP Excellent PEEK Excellent PVDF Excellent
Rubbers Material Rating Viton Excellent NBR Excellent EPDM Excellent Silicone Excellent FKM Excellent
Metals Material Rating Stainless 316 Excellent Aluminum Good Copper Good Brass Good
Applications Agricultural fertilizer (magnesium supplement) Bath salts and therapeutic soaks Pharmaceutical (laxative, magnesium supplement) Textile dyeing and printing Pulp and paper processing Construction (fireproofing) Brewing water treatment Medical treatment (eclampsia, asthma) External References: PubChem
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