Molekula
Magnesium Sulfate Heptahydrate USP
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 Heptahydrate USP is a hydrated inorganic salt primarily used as an electrolyte replenisher, laxative, and anticonvulsant in pharmaceuticals, as well as in agriculture for soil amendment and livestock feed supplements. It is also employed in laboratory settings for precipitation reactions and buffer preparation. This chemical has the CAS number 10034-99-8, with the molecular formula MgSO4·7(H2O) and a molecular weight of 246.48. It is stable under ambient storage conditions and carries no signal word for hazard classification. Molekula supplies Magnesium Sulfate Heptahydrate USP 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 crystalline powder |
| Identification | A) Mg | B) SO4 |
| pH | 5.0 - 9.2 (5% aq.) |
| Loss on Ignition | 40.0 - 52.0% |
| Loss on Drying | 48.0 - 52.0% |
| Chloride (Cl-) | A) ≤ 300ppm (EP) | B) ≤ 0.014% (USP) |
| Solubility | Freely soluble in water, very soluble in boiling water and practically insoluble in ethanol |
| Assay | 99.0 - 100.5% (A- EP | B- USP) |
| Appearance of Solution | Clear and colourless |
| Acidity / Alkalinity | ≤ 0.2ml (0.1M HCl or 0.1M NaOH) |
| Residual Solvents | Conforms to EP/USP |
| Bacterial endotoxins | ≤ 3IU/g |
| Iron (Fe) | ≤ 20ppm (A- EP | B- USP) |
| Arsenic (As) | ≤ 2ppm |
| Selenium (Se) | ≤ 30ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90037146 |
| CAS Number | 10034-99-8 |
| Molecular Formula | MgSO4·7(H2O) |
| Molecular Weight | 246.48 |
| SMILES | O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[Mg+2] |
| REACH Code | Y113 |
| Tariff Code | 28332100 |
Safety & GHS
Detailed safety information available in the SDS — see Documents below.
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
No alternate names recorded for this product.
Frequently asked questions
What is Magnesium Sulfate Heptahydrate USP commonly used for?
It is primarily used as an electrolyte replenisher, anticonvulsant, and laxative in pharmaceutical applications, as well as in food processing and laboratory buffers.
What is the chemical formula and molecular weight of Magnesium Sulfate Heptahydrate USP?
The chemical formula is **MgSO₄·7(H₂O)**, and the molecular weight is **246.48 g/mol**.
How should Magnesium Sulfate Heptahydrate USP be stored?
Store in a tightly sealed container at ambient temperature, away from moisture and incompatible substances.
What grade of Magnesium Sulfate Heptahydrate does Molekula supply?
Molekula supplies **USP-grade** Magnesium Sulfate Heptahydrate, meeting pharmaceutical standards for purity and safety.
Can Molekula supply Magnesium Sulfate Heptahydrate USP in bulk quantities?
Yes, bulk quantities are available upon request—please contact our sales team for pricing and logistics details.
What documentation comes with an order of Magnesium Sulfate Heptahydrate USP?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a USP compliance certificate.
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.