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Magnesium Sulfate

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Overview

Magnesium Sulfate (commonly supplied as hydrated forms such as heptahydrate, MgSO4·7H2O) is a water-soluble magnesium and sulfur source used in crop nutrition programs. It dissolves readily in water and is suitable for incorporation into solid, water-soluble and liquid fertilizers where a defined magnesium and sulfur contribution is required. Material supplied by Bisley International is intended for industrial use in agricultural formulations.


In crop nutrition, magnesium sulfate is used in straight and compound fertilizers, foliar sprays and fertigation products for a broad range of crops, including field crops, fruit, vegetables and horticultural species. Magnesium and sulfur are both essential plant nutrients, but the actual rate, timing and method of application depend on soil status, crop requirements, climate and local agronomic practice. These aspects must be evaluated by the customer's own agronomic and technical teams in line with local regulations.


Bisley International supplies Magnesium Sulfate in controlled technical grades with specified assay, water content, solubility and impurity limits. Product documentation, including technical data sheets, safety data sheets and certificates of analysis, supports quality control and safe handling. As with any fertilizer raw material, users should confirm compatibility with other formulation components and comply with relevant safety, environmental and regulatory requirements before use.

Applications, characteristics and considerations

Applications in fertilizers and crop programs

Magnesium Sulfate is used as a technical magnesium and sulfur source in a range of fertilizer and crop nutrition products, subject to local regulations and the performance requirements of each formulation. Typical applications may include:

  • Component in straight and compound fertilizers to supply magnesium and sulfur to soils with known deficiencies.
  • Ingredient in water-soluble and foliar fertilizers for fruit, vegetable and horticultural crops where rapid nutrient availability is required.
  • Magnesium and sulfur source in fertigation and hydroponic solutions, where complete solubility and controlled composition are important.

Key characteristics

Magnesium Sulfate supplied through Bisley International is produced to a defined technical specification suitable for use in fertilizers and related agricultural products. Typical characteristics include:

  • Water-soluble magnesium and sulfur source, with magnesium expressed as MgO or Mg and sulfur as SO3 or S, according to the technical data sheet.
  • Typical specification for assay and hydration state (e.g. heptahydrate), defining the nutrient content per unit weight.
  • Good dissolution behavior in water, supporting liquid, water-soluble and foliar formulations when used correctly.
  • Specified limits on insoluble matter and key impurities to support consistent quality in crop nutrition value chains.

Handling, storage and selection considerations

As a water-soluble salt, Magnesium Sulfate requires appropriate handling and storage to maintain flowability and product quality. When selecting and using this material, customers should consider:

  • Compliance with the safety data sheet (SDS), including personal protective equipment and measures to manage dust and contact with skin or eyes.
  • Storage conditions that minimise moisture pick-up and caking, such as dry, covered areas and suitable packaging practices.
  • Compatibility with other fertilizer components, including nitrogen, phosphate and potassium sources, to maintain product stability and handling performance.

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ADDITIONAL INFORMATION

Technical support, documentation & logistics

All agricultural raw materials supplied by Bisley International are backed by clear specifications, consistent quality and practical support from our commercial and technical teams. Use this section as a quick guide to how we work with buyers in crop nutrition, feed and related applications.

Technical data & documentation

For each agricultural chemical we can provide up-to-date technical documentation to support your evaluation and regulatory review.

  • Product specifications / typical analysis (TDS)
  • Safety data sheets (SDS) and handling guidance
  • Certificates of analysis (COA) available with each batch
  • Regulatory statements on request, where applicable

Packaging, shipment & delivery

We work with global producers and logistics partners to align product, packaging and delivery terms with your process and route-to-market.

  • Typical options include bags, big bags and other industrial formats
  • Support for containerized shipments and bulk programs
  • Flexible Incoterms and ports, discussed during quotation
  • Coordination with your forwarder, where required

Application-oriented support

Our role is to help connect you with suitable grades and producers for your application, whether you are formulating fertilizers, foliar sprays, feed premixes or other solutions.

  • Discussion of target nutrient content and impurity limits
  • Options across different origin, grade or physical form
  • Support during qualification, sampling and first deliveries
FAQ

Frequently asked questions

Below you will find answers to common questions about Bisley International's agricultural raw materials, documentation and supply approach. All items are collapsed by default, so you can quickly open the topics most relevant to your business.

Which agricultural markets does Bisley International serve?
Bisley International focuses on supplying raw materials for crop nutrition and related segments, including fertilizers, foliar products, fertigation, seed treatment and selected animal nutrition applications. We do not manufacture finished fertilizers or crop protection products; instead, we support producers and formulators with consistent, specification-driven raw materials.
How can I request TDS, SDS and COA for a product?
When you submit an enquiry via the contact form or through your usual Bisley representative, please specify which agricultural chemical you are interested in and the intended use. Our team will share the appropriate technical data sheet, safety data sheet and, where relevant, example certificates of analysis. COA are issued per batch with commercial deliveries.
What is the minimum order quantity (MOQ)?
Minimum order quantities depend on the specific product, origin, packaging and shipping route. Many materials are supplied by the full container load or truckload. Smaller lots may be possible in certain regions via local stock or consolidation. We will clarify practical MOQ and shipment sizes as part of the quotation process.
Which packaging formats are available?
Packaging options vary by product and producer. Typical formats for agricultural chemicals include 25 kg bags, big bags and other industrial containers designed for efficient handling and storage. Available formats and labelling options are discussed with you during enquiry and quotation.
Do you keep stock, or supply only on a made-to-order basis?
The supply model depends on the product and destination. Some materials are shipped directly from producers to customers on a contractual or spot basis, while others may be available from regional stock. During discussion we will outline realistic lead times and whether stock programs could be appropriate for your demand pattern.
Can Bisley International recommend grades for my formulation?
We can help you narrow down suitable raw materials and typical specification ranges based on your target nutrient content and application. However, we do not provide formulation, agronomy or regulatory advice. Final selection, testing and approval of any material must be carried out by your own technical team in line with local requirements.
To which regions can you supply agricultural raw materials?
Bisley International operates with a global outlook. For specific agricultural chemicals we can discuss supply into North America, Latin America, Europe, the Middle East, Africa and Asia-Pacific, subject to commercial, logistical and regulatory feasibility. Please describe your preferred destination when you contact us.
How do I obtain pricing and availability for a specific product?
Please use the enquiry form on this website or contact your usual Bisley representative. Sharing details such as target product, volume, destination and timing will help us to respond with a focused discussion on supply possibilities, lead times and indicative commercial terms.
Do you provide agronomic or advisory services to growers?
No. Bisley International supplies raw materials to companies active in crop nutrition and related value chains. We do not provide agronomic recommendations, application rates or advisory services to farmers or growers. Those decisions should be taken together with your own advisors and local experts.
Where can I learn more about your agricultural product range?
You can explore key agricultural chemicals and mineral nutrients on this website, including calcium, magnesium, phosphate, boron and zinc salts used in modern crop nutrition. If you do not see a particular material listed, please contact us directly: we may still be able to discuss potential sourcing options with you.