Molekula
Magnesium sulfate anhydrous USP grade
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Magnesium sulfate anhydrous USP grade is a high-purity, water-free form of magnesium sulfate, widely used in pharmaceuticals as a laxative, anticonvulsant, and electrolyte replenisher. Magnesium sulfate is also used in fertilizer manufacture, textile dyeing, printing and fabric weighting, leather tanning, and as an ingredient in cosmetic lotions. It also serves as a desiccant, coagulant in tofu production, and additive in food processing. This USP-grade chemical meets strict pharmaceutical standards for safety and consistency, ensuring reliable performance in medical and industrial applications. It has a CAS number of 7487-88-9, molecular formula MgSO₄, and a molecular weight of 120.37 g/mol. Store at ambient conditions with no signal word for hazard classification. Molekula supplies magnesium sulfate anhydrous USP grade from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Heavy metals | ≤ 0.001% |
| Loss on Ignition | ≤ 2% |
| Chloride (Cl-) | ≤ 0.014% |
| Purity | 99.0-100.5% |
| Iron (Fe) | ≤ 0.002% |
| Magnesium identification | USP-NF |
| Sulfate identification | USP-NF |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Orthorhombic crystals |
| Odour | Odorless |
| Melting Point | 1124 °C (decomposition) |
| Density | 2.66 g/cm³ |
| Water Solubility | 360 g/L at 20 °C |
| Solubility (other solvents) | In ether, 1.16 g/100 ml at 18 °C; insoluble in acetone; soluble in alcohol and glycerin |
| Refractive Index | 1.56 |
Source: PubChem CID 24083 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 90037393 |
| CAS Number | 7487-88-9 |
| IUPAC Name | magnesium sulfate |
| EC Number | 231-298-2 |
| Molecular Formula | MgO₄S |
| Molecular Weight | 120.37 |
| Exact Mass | 119.9368 |
| SMILES | [O-]S(=O)(=O)[O-].[Mg+2] |
| InChIKey | CSNNHWWHGAXBCP-UHFFFAOYSA-L |
| InChI | InChI=1S/Mg.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2 |
| PubChem CID | 24083 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2833.21.0000 |
| Tariff Code | 2833210000 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- MAGNESIUM SULFATE
- Magnesium sulfate (1:1)
- Magnesium sulfate anhydrous
- Magnesiumsulfat
- MgSO4
- Sal Angalis
- Sal De sedlitz
- Sulfuric acid magnesium salt
- Sulfuric acid magnesium salt (1:1)
- Tomix OT
Frequently asked questions
What is magnesium sulfate anhydrous USP grade commonly used for?
Magnesium sulfate anhydrous USP grade is primarily used in pharmaceuticals (e.g., laxatives, electrolyte replenishers), as a food additive (e.g., firming agent in tofu), and in laboratory applications for buffer solutions and precipitation reactions.
What is the molecular formula and molecular weight of magnesium sulfate anhydrous?
The molecular formula is MgSO₄ (written MgO₄S in Hill notation), and the molecular weight is 120.37 g/mol.
How should magnesium sulfate anhydrous USP be stored?
Store in a cool, dry place at ambient temperature, away from moisture and incompatible substances, in a tightly sealed container.
What grade of magnesium sulfate anhydrous does Molekula supply, and is USP grade available?
Molekula supplies USP-grade magnesium sulfate anhydrous, meeting pharmaceutical and food-grade standards for purity and consistency.
Can Molekula supply magnesium sulfate anhydrous in bulk quantities?
Yes, Molekula can supply magnesium sulfate anhydrous in bulk, with quantities tailored to your specific requirements—contact us for pricing and logistics details.
What documentation comes with an order of magnesium sulfate anhydrous USP grade?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and USP compliance documentation to verify purity and quality standards.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.