Magnesium sulfate heptahydrate
CAS 10034-99-8
EC 600-073-4
Formula H2O4S.7H2O.Mg
MW 120.37 g/mol
Salts & Minerals Personal Care & CosmeticsAgriculture & FeedPharmaceuticals & HealthcareFood & NutritionWater Treatment Preservation & BiocideAntioxidant & StabilizerCatalysis
Description
Magnesium sulfate heptahydrate (MgSO4·7H2O, CAS 10034-99-8) is an inorganic magnesium salt commonly known as Epsom salt. It carries no E-number designation but is recognised under EC 600-073-4 and is used across food, pharmaceutical, agricultural, and personal care manufacturing.
In agriculture, it corrects magnesium and sulfur deficiencies in soil, directly supporting chlorophyll synthesis and enzyme activation in crops. In pharmaceutical and personal care formulations, it acts as a skin conditioner and osmotic agent, drawing fluid across membranes. It also serves as a catalyst support and process additive in select chemical manufacturing operations.
Magnesium sulfate heptahydrate is available in food-grade (FCC), pharmaceutical-grade (Ph.Eur.), and technical-grade specifications. It is supplied as a white crystalline solid in 25 kg bags or bulk quantities and is fully REACH-compliant. Procurement teams should confirm grade suitability against application-specific regulatory requirements before ordering.
In agriculture, it corrects magnesium and sulfur deficiencies in soil, directly supporting chlorophyll synthesis and enzyme activation in crops. In pharmaceutical and personal care formulations, it acts as a skin conditioner and osmotic agent, drawing fluid across membranes. It also serves as a catalyst support and process additive in select chemical manufacturing operations.
Magnesium sulfate heptahydrate is available in food-grade (FCC), pharmaceutical-grade (Ph.Eur.), and technical-grade specifications. It is supplied as a white crystalline solid in 25 kg bags or bulk quantities and is fully REACH-compliant. Procurement teams should confirm grade suitability against application-specific regulatory requirements before ordering.
Physical Properties
| Melting Point | 50.59 °C |
| Density | 1.67 g/cm³ |
| Appearance | White crystalline powder |
| Color | White |
| Odor | Odorless |
| Form | Solid |
| Water Solubility | Soluble in in water and acid. Slightly soluble in alcohol and glycerol. |
| Vapor Pressure | <0.1 mm Hg ( 20 °C) |
| Refractive Index | 1.433 |
| pH | 5.0-8.0 (25℃, 50mg/mL in H2O) |
| Log P | -1.031 (est) |
Trade & Regulatory
| HS Code | 28332100 |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 1 |
Other Names
Epsom saltMgSO₄⋅7H₂OMgSO4⋅7H2OMgSO4·7H2OBITTER SALTEPSOM SALTS
Related Products
Raw Materials
Derivatives
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