TCS Industries Limited (China-sourced API supplier) supplies Magnesium Sulfate –-– Magnesium Source for Pharma and Industry CAS 7487-88-9 for pharmaceutical B2B procurement — COA, MSDS, and technical documentation available on request.
> Overview
| Product Name | Magnesium Sulfate –-– Magnesium Source for Pharma and Industry |
|---|---|
| Structural Formula |  |
| CAS Number | 7487-88-9 |
| Molecular Formula | H14MgO11S |
| Molecular Weight | 246.47 g/mol (heptahydrate); 120.37 g/mol (anhydrous) |
| InChIKey | CSNNHWWHGAXBCP-UHFFFAOYSA-L |
| SMILES | Available on request where applicable |
| Appearance | White crystalline powder or crystals |
| Purity / Grade | By agreed specification and batch COA |
| Storage | Keep tightly closed in a cool, dry, well-ventilated place |
Magnesium Sulfate (CAS 7487-88-9) is an inorganic salt with the formula MgSO₄. The anhydrous form has a molecular weight of 120.37 g/mol; the heptahydrate (Epsom salt, MgSO₄·7H₂O, CAS 10034-99-8) is the standard commercial form. Magnesium sulfate is used in pharmaceutical products (parenteral magnesium replacement, tocolysis, pre-eclampsia management), agriculture (magnesium-sulfur fertilizer), and industrial applications (paper, textiles, bath products).
TCS Industries Limited, a Hong Kong-based trading and sourcing company, supplies Magnesium Sulfate in pharmaceutical, food, feed, agricultural and industrial grades.
> Applications
Parenteral magnesium replacement and obstetric use
Magnesium sulfate injection (USP) is used for treatment of hypomagnesemia, prevention of seizures in pre-eclampsia/eclampsia, and as a tocolytic agent. It is administered intravenously or intramuscularly at concentrations of 10–50% w/v. Pharmaceutical-grade anhydrous or heptahydrate material is used for injection solution manufacturing. Altman et al. (Lancet, 2002, 359:1877–1890) reported the landmark Magpie trial establishing magnesium sulfate efficacy in eclampsia prevention.
Agricultural magnesium-sulfur fertilizer
Magnesium sulfate heptahydrate (Epsom salt) is a water-soluble magnesium and sulfur source for foliar application and fertigation. It provides 9.9% Mg and 13.0% S in the heptahydrate form. It is used for correction of magnesium deficiency in crops (chlorosis), particularly in sandy or acidic soils with low cation exchange capacity. Kieserite (MgSO₄·H₂O) is used as a granular soil-applied form.
> Sourcing & Supply
TCS Industries Limited supports development, qualification and commercial purchasing discussions for Magnesium Sulfate –-– Magnesium Source for Pharma and Industry with buyers in South America, Europe, the United Kingdom, Australia, New Zealand, Mexico and Canada.
- Evaluation and commercial quantities: 25 kg bags for qualification; pallet and bulk for production. Anhydrous, monohydrate (kieserite) and heptahydrate (Epsom salt) forms available in pharma, food, feed, and technical grades.
- Pallet quantities and production campaigns: repeat supply is coordinated against packaging, lead time, annual demand and destination-market import requirements.
> Quality & Documentation
Key specification parameters depend on grade and hydration form. Pharmaceutical grade (USP/Ph.Eur.): assay (≥99.0% MgSO₄ on dried basis), heavy metals, chloride, arsenic, barium, calcium, potassium, sodium, iron, and loss on ignition. The heptahydrate must meet specific water content (40–52% for MgSO₄·7H₂O). Food grade (FCC/E518): assay, heavy metals, pH. Agricultural grade: MgO content (≥16% as anhydrous equivalent), water-soluble Mg, particle size. COA and MSDS are standard.
> Packaging
Magnesium Sulfate heptahydrate is stable at room temperature but may lose water of crystallization above 48 °C. Standard packaging includes 25 kg woven PP bags with PE liner (agricultural grade), 25 kg paper bags (food/pharma grade), and palletized shrink-wrapped units. Pharmaceutical-grade material is packed per applicable pharmacopoeial requirements. Labels and documents are checked before dispatch.
> Pricing & MOQ
Pricing is quoted by specification, packaging and destination. Common commercial discussions use 25 kg bag/drum formats, pallet quantities and production-campaign planning; smaller samples may be reviewed for qualified formulation teams.
> Regulatory & Compounding Context
Magnesium Sulfate is monographed in USP, BP and Ph.Eur. (Magnesii sulfas heptahydricus). It is on the WHO Model List of Essential Medicines for eclampsia prevention. Approved as food additive E518 in the EU and GRAS in the US (21 CFR 184.1443). Listed in the FDA Inactive Ingredients Database. As a fertilizer, registered under EU FPR and national fertilizer regulations. No special import permits for standard grades.
> Alias Index
- Chemical name: Magnesium sulfate
- CAS Number: 7487-88-9 (anhydrous); 10034-99-8 (heptahydrate, Epsom salt); 14168-73-1 (monohydrate, kieserite)
- Formula: MgSO₄ (anhydrous, MW 120.37); MgSO₄·7H₂O (heptahydrate, MW 246.47)
- Common names: Epsom salt (heptahydrate), Kieserite (monohydrate), Bitter salt
- EU food additive: E518
- Pharmacopoeial names: Magnesii sulfas heptahydricus (Ph.Eur.), Magnesium Sulfate (USP)
- InChIKey: CSNNHWWHGAXBCP-UHFFFAOYSA-L
- Commercial request terms: magnesium sulfate USP, Epsom salt bulk, MgSO4 pharma grade, kieserite fertilizer, E518, TCS Industries Limited
> FAQ
What forms of Magnesium Sulfate does TCS supply?
TCS sources anhydrous MgSO₄, monohydrate (kieserite) and heptahydrate (Epsom salt) in pharmaceutical (USP/Ph.Eur.), food (FCC/E518), feed, and technical grades. Specify the hydration form, grade and intended application at inquiry.
What documents are available for Magnesium Sulfate –-– Magnesium Source for Pharma and Industry orders?
COA and MSDS are standard for commercial discussions. COO, packing list, invoice and other import-support documents can be arranged according to order scope.
Can TCS Industries Limited support Magnesium Sulfate –-– Magnesium Source for Pharma and Industry supply to South America?
Yes. We support B2B buyers in Argentina, Colombia, Chile, Peru, Ecuador, Uruguay, Bolivia, Brazil, Paraguay, Venezuela, Guyana and Suriname, subject to route and document review.
Do you support Europe, the United Kingdom, Australia, New Zealand, Mexico and Canada?
Yes. These destinations can be reviewed for project supply, import documents, packaging and logistics planning before quotation.
Is Magnesium Sulfate on the WHO Essential Medicines List?
Yes. Magnesium Sulfate injection is on the WHO Model List of Essential Medicines for prevention and treatment of eclamptic seizures in pre-eclampsia. This makes pharmaceutical-grade magnesium sulfate a strategic API for essential medicines programs in developing countries.
What is the difference between anhydrous and heptahydrate Magnesium Sulfate?
Anhydrous MgSO₄ (CAS 7487-88-9, MW 120.37) contains no water of crystallization. Heptahydrate MgSO₄·7H₂O (CAS 10034-99-8, MW 246.47, Epsom salt) contains 51.2% water. They have different CAS numbers, densities, and handling properties. Pharmaceutical formulations must specify which form and its assay on dried or as-is basis.
Can you arrange samples before commercial purchasing?
Samples or evaluation quantities may be reviewed for qualified buyers after target specification, application and destination-market requirements are clarified.
How is Magnesium Sulfate –-– Magnesium Source for Pharma and Industry packaged for export?
Packaging is confirmed by quantity and material properties. Typical options include foil bags, HDPE containers, fibre drums, 25 kg bags or palletized export packaging.
Can buyer-defined specifications be reviewed?
Yes. Send the specification, methods, impurity limits and required documents. TCS can review feasibility before confirming quotation and lead time.
What payment terms are normally used?
Standard payment is 100% T/T before dispatch unless a different arrangement has been approved for an established commercial account.
What lead time should buyers expect?
Lead time depends on stock, batch size, document scope and destination. Available stock can move faster; made-to-order or pallet programs require longer planning.
Can Magnesium Sulfate be used in organic farming?
Yes. Magnesium Sulfate (natural kieserite) is permitted in organic farming under EU Regulation 2018/848 (Annex II) and USDA NOP as a mined mineral. It corrects magnesium deficiency without synthetic chemistry. Specify whether organic-certified or standard grade is required at inquiry.
Last reviewed: June 2026
Evaluation and research orders (≤10 kg) are shipped with COA, MSDS, and certificate of origin. Bulk commercial orders (>10 kg) qualify for volume pricing with a full technical documentation package available on request.
> Request a Quote
If your team already has a target application, estimated quantity, destination market, or documentation requirements, send those details so the commercial response can be prepared more efficiently.