The market is vast! The application scenarios of magnesium sulfate heptahydrate are continuously expanding BY:Lydia

Price trend: entering a rapid upward channel

Recently, the market price of magnesium sulfate heptahydrate has continued to rise, staying within the high range seen in recent years.

The price increase is evident. According to data from the Business Society, the market benchmark price on April 24, 2026, reached 1083.33 yuan/ton, an increase of over 27% compared to the 850 yuan/ton at the beginning of the year. Especially during March and April, the increase accelerated significantly.

Supply and demand and production capacity: Global production remains stable, with some projects in China coming online

Market Size

The market size of magnesium sulfate heptahydrate in China reached 584 million yuan (RMB) in 2025, while the global market size of magnesium sulfate heptahydrate reached 1.985 billion yuan in the same year. It is estimated that the global magnesium sulfate heptahydrate market will grow at a compound annual growth rate (CAGR) of 0.41% during the forecast period, and the total market size of magnesium sulfate heptahydrate will reach 2.043 billion yuan by 2032.

China’s Production Capacity

China is one of the major producers with a stable market position. In terms of large-scale projects, the production base of anhydrous magnesium sulfate with an annual output of 100,000 tons (one ton of anhydrous magnesium sulfate requires two tons of magnesium sulfate heptahydrate) in Xintai, Shandong is expected to be put into operation by the end of 2025, significantly increasing production capacity.

Downstream applications: Agriculture as the cornerstone, with steady growth in demand from the pharmaceutical industry

Agricultural fertilizer consumption accounts for approximately 61%, making it the largest driving force. Its main applications include direct application as magnesium fertilizer, or use in the production of compound fertilizers, water-soluble fertilizers, and foliar fertilizers, primarily addressing magnesium deficiency in soil and enhancing crop yield and quality. Key crops include high-value economic crops such as citrus, bananas, sugar cane, tomatoes, tea, and tobacco; usage in field crops such as rice and corn is also increasing. Regional distribution: Southern China (Guangdong, Guangxi, Fujian, Yunnan), Southeast Asia, and South America (Brazil) are the regions with concentrated demand. Growth drivers: promotion of soil testing and formulated fertilization policies, expansion of economic crop planting areas, and increased awareness among farmers regarding magnesium deficiency. Market trends: high-purity products for water-soluble and foliar fertilizers are growing rapidly (with an annual increase of about 10%). Demand for granular products is on the rise, facilitating mechanical sowing. Export markets are expanding to Southeast Asia, South America, and the Middle East, with fierce price competition but a certain premium for high-end granules.

The proportion of medical and health consumption accounts for about 11%. As raw materials (for injections, oral laxatives) and pharmaceutical excipients, the market demand is stable and the added value is relatively high.

The industrial sector is a rapidly growing segment within industrial applications (accounting for 27% of the total), with an annual growth rate exceeding 10%, significantly higher than the industry average. The main products include magnesium oxysulfide fireproof boards (with the largest consumption): used for partition walls, ceilings, fireproof door cores, duct insulation, etc. Magnesium-based flame retardants (emerging): used in halogen-free low-smoke cable materials, thermoplastic elastomers, coatings, etc. Growth drivers: mandatory building fire protection standards requiring Class A non-combustible materials. Promotion of green building materials, with magnesium oxysulfide boards being environmentally friendly and formaldehyde-free. Prefabricated buildings driving demand for prefabricated boards.