Magnesium Sulfate - Market Share Analysis, Industry Trends & Statistics, Growth Forecasts (2026-2031)

The magnesium sulfate market was valued at USD 0.81 billion in 2025 and is estimated to grow from USD 0.85 billion in 2026 to reach USD 1.12 billion by 2031, at a CAGR of 5.76% during the forecast period (2026-2031). This report is Segmented by Product Type (Heptahydrate, Monohydrate, and Anhydrous Magnesium Sulfate), Physical Form (Crystals, Powder, Granules, and Liquid Solution), Grade (Agriculture Grade, Pharmaceutical Grade, Food Grade, and More), End-User Industry (Agriculture, Chemical, and More), and Geography (Asia-Pacific, North America, and More). The Market Forecasts are Provided in Terms of Value (USD).

Global Magnesium Sulfate Market Trends and Insights

Soil Magnesium and Sulfur Depletion

Intensive crop production removes magnesium and sulfur faster than natural cycles can restore them in many production systems. A 2025 review reported maize yield responses of 20% to 260% after sulfur application across Sub-Saharan African test sites, showing the severity of baseline sulfur deficiencies. Long-term potassium fertilizer use has also reduced root uptake of magnesium, creating a structural nutrient gap that current fertilizer spending only partly addresses. Acidic soils affect 40% to 50% of potentially cultivable land and can accelerate magnesium leaching in tropical and subtropical systems. Fruit, vegetable, and sugarcane production can intensify these nutrient losses because of repeated harvest cycles. The magnesium sulfate market benefits where growers need both nutrients in one soluble application rather than separate products.

Expansion of Pharmaceutical Magnesium Sulfate Use in Maternal Healthcare

Magnesium sulfate use in maternal medicine is expanding beyond established eclampsia treatment into protocols that increase dosage volumes per patient. A 2026 review stated that antenatal MgSO4 is recommended for fetal neuroprotection when preterm birth is imminent before 30 weeks of gestation. The review linked this use to a reduction in cerebral palsy incidence of nearly one-third. The National PreCePT Programme in England increased MgSO4 uptake for threatened preterm births and showed favorable cost-effectiveness, as cited in the same review. Piston Medical Limited launched Uganda’s first locally manufactured magnesium sulfate injection in July 2026 for an East African demand pool. Local production can increase pharmaceutical consumption in places that previously relied fully on imports.

Stringent Pharmacopeial and Contaminant Specifications

Multi-pharmacopeia compliance limits the number of suppliers that can serve regulated pharmaceutical buyers. The United States Pharmacopeia (USP) monograph specifies 98.0% to 102.0% assay purity on an anhydrous basis, chloride below 0.014%, and strict limits for iron, selenium, and bacterial endotoxin in parenteral forms. These specifications require dedicated manufacturing lines, validated cleaning, and procedures that differ from agricultural grade production. Iron limits also differ between the USP and European Pharmacopoeia, requiring separate inventory, certificates of analysis, and use-specific labeling. The USP posted a notice to revise the monograph in May 2024, and the change became official in May 2025. Producers had to update validation documentation and analytical standards during a period of growing demand. The costs are especially difficult for emerging-market producers that want to move from agricultural to pharmaceutical grade.

Other drivers and restraints analyzed in the detailed report include:

• Crop-Specific Magnesium-Sulfur Formulation for Closed-Loop Horticulture
• Pharmaceutical Grade Supply Localization for Emergency-Care Formulations
• Compatibility and Precipitation Risk in Multi-Tank Fertigation Systems

Segment Analysis

Heptahydrate (Epsom salt) accounted for 56.78% of the magnesium sulfate market in 2025. The form remains widely used because it is stable under ambient conditions, dissolves fully in water, and serves agricultural, pharmaceutical, and personal care uses. Its 7 molecules of crystallization make it the reference product for specifications, pricing, and trade reporting. Monohydrate (Kieserite) is another product type supplied by K+S Aktiengesellschaft under the ESTA Kieserit brand from German underground deposits using dry electrostatic separation. The company positions it as a pH-neutral and immediately plant-available input for soil application.

Anhydrous magnesium sulfate is forecast to grow at a 6.36% CAGR through 2031. It is used as an industrial desiccant, a compounding ingredient for moisture-controlled pharmaceutical solid-dose formulations, and an active ingredient in electrolyte therapies. China imported 18,000 metric tons of high-purity anhydrous magnesium sulfate from Japan and Germany in 2025 and paid 2.3 times its domestic price because the suppliers offer precision crystallization and heavy-metal-removal capabilities. Global filings in MgSO4 process technology reached 247 in 2025, up 9% from the prior year, with activity in crystal-size control, heavy-metal removal, and soluble magnesium-salt preparation. These technical capabilities can support the magnesium sulfate industry in higher-specification pharmaceutical and horticulture applications.

Powder accounted for 38.35% of the magnesium sulfate market in 2025. It leads because it can be used in fertigation stock preparation, pharmaceutical compounding, and industrial processes. Its use is supported by compatibility with mechanized spreaders and compound-fertilizer blending. Crystals are used mainly in personal care, bath products, and food grade applications, where larger particle size and visual clarity support retail positioning.

Liquid solution is forecast to grow at a 6.62% CAGR through 2031, the fastest rate among physical forms. Demand comes mainly from commercial closed-loop horticulture in Europe, South Korea, and China, where systems need pre-dissolved magnesium and sulfate ions that are immediately available to plants. A liquid product can be delivered through a dedicated injector channel and diluted in-stream, reducing the precipitation risk associated with concentrated powder stock preparation. In published trials, closed-loop systems with ion-selective electrode monitoring achieved 46% higher water productivity than conventional open systems. This performance is being incorporated into procurement specifications at some commercial greenhouse operations in the magnesium sulfate market.

Complete Report Scope:

• By Product Type
  • Heptahydrate (Epsom Salt)
  • Monohydrate (Kieserite)
  • Anhydrous Magnesium Sulfate
• By Physical Form
  • Crystals
  • Powder
  • Granules
  • Liquid Solution
• By Grade
  • Agriculture Grade
  • Pharmaceutical Grade
  • Food Grade
  • Feed Grade
  • Industrial Grade
  • Consumer Grade
• By End-User Industry
  • Agriculture
  • Pharmaceutical and Healthcare
  • Food and Beverage
  • Personal Care and Cosmetics
  • Animal Feed
  • Pulp and Paper
  • Textile and Leather
  • Water Treatment
  • Chemical
  • Other End-User Industries
• By Geography
  • Asia-Pacific
    • China
    • India
    • Japan
    • South Korea
    • ASEAN Countries
    • Rest of Asia-Pacific
  • North America
    • United States
    • Canada
    • Mexico
  • Europe
    • Germany
    • United Kingdom
    • France
    • Italy
    • NORDIC Countries
    • Russia
    • Rest of Europe
  • South America
    • Brazil
    • Argentina
    • Rest of South America
  • Middle-East and Africa
    • Saudi Arabia
    • South Africa
    • Rest of Middle-East and Africa

Geography Analysis

Asia-Pacific held 41.78% of the magnesium sulfate market share in 2025 and is forecast to grow at a 6.87% CAGR through 2031. In China, a soil assessment in Fujian Province found that 81.5% of tested plots were below the magnesium-sufficiency threshold of 120 mg/kg. Research also found magnesium deficiency across 55% of arable land in southern China. China’s soil-testing and formula-fertilization program has covered more than 1 billion mu (approximately 66.7 million hectares) of cultivated land and has incorporated magnesium sulfate into provincial secondary-nutrient recommendations.

North America and Europe represent the main premium grade demand centers for the magnesium sulfate market, although their supply positions differ. China supplied 53% of U.S. magnesium sulfate imports from 2021 to 2024, followed by Germany at 12%, India at 11%, and Mexico at 7%. North American benchmark prices reached USD 0.41 per kg in April 2026, 37% above Northeast Asian and European levels of USD 0.30 per kg. Europe is largely self-sufficient in specialty grades, and K+S Aktiengesellschaft states that its Werra 2060 project is designed to maintain the capacity to supply 100% of EU magnesium sulfate demand from Germany.

South American demand is concentrated in Brazil and Argentina, where soybean, corn, and sugarcane production on tropical soils supports ongoing magnesium and sulfur demand, and K+S Aktiengesellschaft expects Brazil to remain a growth area for potassium and magnesium fertilizers during its planning period. In the Middle-East and Africa, pharmaceutical demand is growing because of maternal health investment. Piston Medical Limited’s July 2026 launch of a locally manufactured injection for Uganda, Kenya, Tanzania, South Sudan, and the Democratic Republic of Congo shows the development of regional supply. Gulf Cooperation Council countries also form a distinct demand area for controlled-environment agriculture and precision-irrigated horticulture under food-security programs.

List of Companies Covered in this Report:

• ACURO ORGANICS LIMITED
• China Nafine Group International Co., Ltd.
• Haifa Negev technologies LTD
• ICL
• Industrias Peñoles
• Jost Chemical Co.
• K+S Aktiengesellschaft
• Laizhou City Laiyu Chemical CO.,Ltd
• Laizhou Guangcheng Chemical Co., Ltd.
• SML Limited
• Tianjin Xingyu Fertilizer Industry Co., Ltd.
• UMAI CHEMICAL CO., LTD.
• Weifang City Huakang Magnesium Sulphate Factory
• Yingkou Magnesite Chemical Ind. Group Co., Ltd.

Additional Benefits:

• The market estimate (ME) sheet in Excel format
• 3 months of analyst support