Industrial Chemicals
Magnesium Chloride
Magnesium salt used in de-icing, dust control, magnesia cement and as an industrial magnesium source.
Applications
- De-icing & dust control
- Cement, concrete & mortar
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Agriculture
Magnesium Sulfate
MgSO4
Source of soluble magnesium and sulfur for fertilizers, with uses in pharmaceuticals and textiles.
- Chemical name
- Magnesium sulfate
- CAS number
- 7487-88-9
- Also known as
- Magnesium sulphate, Epsom salt
Product overview
Magnesium sulfate is a soluble salt that supplies both magnesium and sulfur. The heptahydrate form is widely known as Epsom salt.
In agriculture it is used to correct magnesium and sulfur deficiencies, either directly or in fertilizer blends and foliar feeds. It is also used in pharmaceutical preparations, textile dyeing and finishing, and general chemical processing.
Applications
Typical uses for this chemical. Suitability for a specific process, and grade requirements for food, pharmaceutical or potable-water use, should be confirmed with our team.
Technical information
| Chemical name | Magnesium sulfate |
|---|---|
| Formula | MgSO4 |
| CAS number | 7487-88-9 (anhydrous)10034-99-8 (heptahydrate) |
| Molecular weight | 120.37 g/mol (anhydrous MgSO4); 246.47 g/mol (heptahydrate MgSO4·7H2O); 138.38 g/mol (monohydrate MgSO4.H2O) |
| HS code | 2833.21 |
| Transport classification | Not regulated for transport |
| Appearance | Colourless to white crystals (heptahydrate, needle-like rhombic crystals); monohydrate/kieserite as off-white powder or granules |
| Forms | Heptahydrate crystals (0.1-1 mm, 1-4 mm) · Heptahydrate fine crystalline powder (foliar/fertigation) · Monohydrate powder · Monohydrate/kieserite granules (2-5 mm) · Liquid magnesium sulfate solutions |
| Grades | Technical/industrial grade heptahydrate (≥ 99-99.5%) · Fertilizer grade heptahydrate (16% MgO, 13% S) · Kieserite / monohydrate fertilizer grade (25-27% MgO) · Feed grade · USP/FCC (Epsom salt, pharmaceutical and food) |
| Packaging | 25 kg bags · Big bags / supersacks (FIBC) · Bulk (kieserite for bulk blending) |
Identifiers and classifications are standard reference data for the substance. Forms, grades and packaging reflect what is commonly traded internationally; availability for your order is confirmed in the quotation.
Typical specifications
Typical values for commonly traded grades of Magnesium Sulfate, based on international standards and published manufacturer data.
Heptahydrate 99.5% (typical)
| Parameter | Typical value |
|---|---|
| MgSO4·7H2O | ≥ 99.5% |
| Magnesium (Mg) | ≥ 9.8% |
| Sulfur (S) | ≥ 12% |
| Chloride (Cl) | ≤ 50 ppm |
| Iron (Fe) | ≤ 15 ppm |
| Lead (Pb) | ≤ 10 ppm |
| Arsenic (As) | ≤ 2 ppm |
| Water insolubles | ≤ 10 ppm |
| pH | 4.5-6.5 |
| Particle size | 1-4 mm |
Heptahydrate fertiliser grade (typical)
| Parameter | Typical value |
|---|---|
| MgO (water soluble) | 16% (= 9.6% Mg) |
| SO3 (water soluble) | 32.5% (= 13% S) |
| Form | Fine crystalline, dissolves without residue |
Monohydrate powder (typical)
| Parameter | Typical value |
|---|---|
| Total MgO | ≥ 27% |
| Water-soluble MgO | ≥ 24% |
| Water-soluble S | ≥ 19% |
| Chloride (Cl) | ≤ 0.5% |
| Moisture | ≤ 2% |
| Particle size | 0.1-1 mm (≥ 90%) |
Reference standards:HG/T 2680-2017 (Magnesium sulfate for industrial use, China)USP / FCC monographs (Epsom salt, food/pharma grades)
Heptahydrate (Epsom salt) is fully water soluble for fertigation and foliar use; monohydrate carries more MgO per tonne.
Typical values are for guidance. The specification for your order depends on grade and origin and is confirmed in the quotation, Technical Data Sheet and Certificate of Analysis.
Packaging
- 25 kg bags
- Big bags / supersacks (FIBC)
- Bulk (kieserite for bulk blending)
Packaging commonly used for export shipments of this product. Availability depends on grade and origin and is confirmed per order.
Packaging confirmed per order
Tell us your preferred packaging and handling requirements — we'll confirm available options for your grade, volume and destination.
Industries
Documentation
Request the documents you need to evaluate Magnesium Sulfate. We send documents that match the grade being quoted.
- TDS
Technical Data Sheets
Product specifications and technical information.
- SDS
Safety Data Sheets
Safety and handling documentation where available.
- COA
Certificate of Analysis
Batch-specific documentation where applicable.
Request a Quote
Get a quotation for Magnesium Sulfate
Share your quantity and destination — our export team will confirm grade, packaging and pricing.
Frequently asked questions
What grades of Magnesium Sulfate are available?
Magnesium Sulfate is commonly traded as Technical/industrial grade heptahydrate (≥ 99-99.5%); Fertilizer grade heptahydrate (16% MgO, 13% S); Kieserite / monohydrate fertilizer grade (25-27% MgO); Feed grade; USP/FCC (Epsom salt, pharmaceutical and food). Availability varies by origin and destination market — share the grade, purity or standard you require and we will confirm what can be supplied, with the current specification.
What is the HS code for Magnesium Sulfate?
Magnesium Sulfate is usually classified under HS 2833.21. National tariff codes add further digits and can differ by form and country, so confirm the full code with your customs broker before shipment.
Is Magnesium Sulfate a dangerous good for shipping?
Magnesium Sulfate is generally not regulated as a dangerous good for road, sea or air transport. The Safety Data Sheet for the grade shipped is the reference used when booking freight.
Which standards apply to Magnesium Sulfate?
Commonly referenced standards include HG/T 2680-2017, USP / FCC monographs. Tell us which standard your application or market requires and we will confirm a grade that meets it.
How is Magnesium Sulfate packed for export?
Common export packaging for Magnesium Sulfate includes 25 kg bags; Big bags / supersacks (FIBC); Bulk (kieserite for bulk blending). Tell us your preferred packaging and we will confirm what is available for your grade and volume.
Can I get the TDS, SDS or COA for Magnesium Sulfate?
Yes — request them on this page. We send the documents that apply to the specific grade you are evaluating; a Certificate of Analysis is batch-specific and issued where applicable.
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