Magnesium Sulfate Monohydrate Market Size, Share & Trends Analysis Report By Product (Agricultural Grade, Pharmaceutical Grade, Technical Grade), By Applications (Fertilizer Industry, Feed Industry, Pharmaceutical Industry, Industrial Field, Other), By End Use, By Region, and Segment Forecasts - 2035

Magnesium Sulfate Monohydrate Market Overview

The magnesium sulfate monohydrate market size is expected to grow from USD 131 million in 2025 to USD 137.29 million in 2026 and is forecast to reach USD 211.83 million by 2035 at 4.8% CAGR over 2026-2035.

The Magnesium Sulfate Monohydrate Market is expanding steadily as agriculture, animal nutrition, pharmaceutical processing, and industrial manufacturing continue to require concentrated magnesium and sulfur inputs. Agricultural Grade accounts for approximately 52% of current product demand, followed by Technical Grade at around 30% and Pharmaceutical Grade at nearly 18%. Fertilizer Industry is the leading application with approximately 46% share, while Feed Industry represents around 19%, Industrial Field contributes nearly 16%, Pharmaceutical Industry accounts for approximately 12%, and Other applications represent about 7%. Demand is supported by increasing awareness of magnesium deficiency in soils, greater use of balanced crop nutrition, and broader adoption of specialty fertilizers in intensive farming systems. Approximately 43% of commercial growers are increasing attention to secondary nutrient management, while around 34% of major producers are improving crystallization, drying, particle control, and product-purity management. Industrial buyers are also emphasizing consistent solubility, controlled moisture, and reliable magnesium content, creating stronger demand for standardized monohydrate grades.

The United States accounts for approximately 16% of global Magnesium Sulfate Monohydrate Market demand and remains an important consumption center because of its large fertilizer, feed, pharmaceutical, and industrial sectors. Agricultural Grade represents approximately 50% of domestic demand, Technical Grade accounts for around 31%, and Pharmaceutical Grade contributes nearly 19%. Fertilizer Industry represents approximately 44% of U.S. application demand, Feed Industry accounts for around 20%, Industrial Field contributes nearly 17%, Pharmaceutical Industry represents approximately 13%, and Other applications account for about 6%. Around 41% of large growers increasingly consider magnesium and sulfur status when developing crop nutrient programs, while approximately 35% of fertilizer distributors are expanding specialty nutrient offerings. Demand is also supported by precision agriculture, soil testing, and higher-value crop production, where targeted magnesium supplementation can improve nutrient balance and support consistent crop performance.

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Key Findings

• Leading Product Type: Agricultural Grade is expected to remain the leading product category with approximately 52% market share, supported by widespread magnesium and sulfur supplementation across intensive crop-production systems.
• Leading Application: Fertilizer Industry is projected to dominate application demand with approximately 46% share as growers increasingly correct secondary nutrient deficiencies and improve balanced crop nutrition.
• Leading Region: Asia-Pacific is expected to lead the market with approximately 45% share, supported by large agricultural acreage, expanding fertilizer consumption, and concentrated magnesium chemical production.
• Fastest Growing Region: Asia-Pacific is projected to expand fastest, with specialty nutrient adoption increasing by approximately 26% across major agricultural markets and high-value crop production systems.
• Technology Trend: Controlled crystallization and particle engineering are gaining importance, with approximately 34% of major producers investing in improved drying, granulation, purity control, and product uniformity.
• Market Driver: Soil magnesium deficiency remains a major demand catalyst, with approximately 43% of commercial growers increasing attention to magnesium and sulfur within balanced fertilizer programs.
• Competitive Landscape: The four leading supplied companies are estimated to account for approximately 48% of market participation as producers strengthen agricultural-grade capacity, quality consistency, and regional distribution networks.
• Future Outlook: Precision nutrient management will become increasingly important, with approximately 37% of commercial farms adopting more targeted soil testing, nutrient mapping, or crop-specific fertilizer programs.

Latest Trends

Precision nutrient management is becoming one of the most important trends shaping the Magnesium Sulfate Monohydrate Market. Fertilizer Industry accounts for approximately 46% of total demand, while Agricultural Grade represents around 52% of product consumption, demonstrating the market's strong dependence on crop nutrition. Approximately 43% of commercial growers are increasing attention to magnesium and sulfur status as part of broader soil fertility management, while around 37% are adopting more targeted soil testing, nutrient mapping, or crop-specific fertilizer programs. Magnesium sulfate monohydrate is increasingly incorporated into specialty fertilizer blends, direct soil applications, and nutrient-management strategies where magnesium deficiency can limit chlorophyll formation and crop performance. Manufacturers are responding by improving granule consistency, solubility, and product handling. Around 34% of major producers are investing in tighter crystallization, drying, and particle-size control to meet increasingly specific agricultural requirements.

Product purity and application-specific differentiation are also becoming stronger trends across pharmaceutical, feed, and industrial markets. Pharmaceutical Grade accounts for approximately 18% of product demand, while Technical Grade contributes around 30%, creating significant requirements beyond agriculture. Approximately 39% of pharmaceutical and high-specification industrial buyers increasingly emphasize impurity control, controlled moisture, and batch consistency. Feed Industry, representing around 19% of application demand, is also placing greater attention on mineral uniformity and product traceability. Producers are therefore strengthening analytical testing, raw-material qualification, and packaging systems. Around 31% of manufacturers are expanding automated quality monitoring to improve consistency across different grades. These developments are moving the market toward more clearly differentiated agricultural, pharmaceutical, and technical products rather than one standardized commodity specification.

Market Dynamics

Driver

""Growing need for balanced crop nutrition is strengthening magnesium sulfate demand.""

The primary driver of the Magnesium Sulfate Monohydrate Market is increasing recognition of magnesium and sulfur as important secondary nutrients in intensive agriculture. Approximately 43% of commercial growers are giving greater attention to magnesium and sulfur within fertilizer programs, particularly where soil testing indicates nutrient imbalances. Fertilizer Industry accounts for approximately 46% of total application demand, while Agricultural Grade represents around 52% of product consumption. High-yield farming, repeated cropping, and increased use of concentrated primary fertilizers can create greater need for secondary nutrient supplementation. Around 37% of commercial farms are adopting more targeted nutrient-management practices, supporting demand for products that can be applied according to crop and soil requirements. These factors are expected to sustain the market's 4.8% CAGR through 2035.

Restraint

""Raw-material costs and competition from alternative magnesium sources limit wider adoption.""

The major restraint is price sensitivity within agricultural and industrial applications, combined with competition from alternative magnesium-containing products. Approximately 38% of bulk agricultural buyers identify input cost as an important purchasing consideration, while around 31% compare magnesium sulfate monohydrate against alternative nutrient sources based on delivered cost and nutrient concentration. Agricultural Grade accounts for approximately 52% of market demand, making the overall market particularly sensitive to fertilizer economics. Technical Grade, representing around 30%, also faces competition from alternative magnesium compounds in selected industrial processes. Transportation expenses can further affect competitiveness because mineral products are relatively bulky compared with higher-value specialty chemicals. Producers must therefore maintain efficient manufacturing, dependable logistics, and clear application benefits to preserve demand across price-sensitive markets.

Opportunity

""Specialty fertilizers and emerging agricultural markets create substantial growth opportunities.""

Expanding specialty fertilizer use across Asia-Pacific and other developing agricultural markets creates a major opportunity for magnesium sulfate monohydrate producers. Asia-Pacific accounts for approximately 45% of global demand, while specialty nutrient adoption is increasing by around 26% across major agricultural markets. Fertilizer Industry represents approximately 46% of application demand, providing a strong commercial base for crop-specific nutrient products. Around 35% of fertilizer distributors are expanding specialty nutrient portfolios to address soil deficiencies and high-value crop requirements. Producers can increase value by offering more consistent particle sizes, improved solubility, application-specific grades, and products suited to precision nutrient programs. Companies with strong agricultural distribution and reliable product quality are positioned to benefit most from the shift toward balanced fertilization.

Challenge

""Maintaining consistent purity and moisture across multiple grades remains technically demanding.""

The central challenge is maintaining stable magnesium content, moisture, particle characteristics, and impurity levels across Agricultural Grade, Pharmaceutical Grade, and Technical Grade products. Approximately 39% of high-specification buyers identify purity and batch consistency as critical purchasing factors, while around 31% of manufacturers are increasing automated quality monitoring. Agricultural Grade accounts for approximately 52% of demand, but Pharmaceutical Grade, with around 18%, requires substantially tighter impurity and quality controls. Technical Grade represents approximately 30% and often requires consistent processing behavior across industrial applications. Producers must therefore manage raw-material quality, crystallization, drying, screening, storage, and packaging carefully to prevent variability. Maintaining these controls while remaining cost competitive across different end-use sectors will remain an important operational challenge through 2035.

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Segmentation Analysis

By Types

Agricultural Grade: Agricultural Grade accounts for approximately 52% of the Magnesium Sulfate Monohydrate Market and remains the dominant product category because of its extensive use in correcting magnesium and sulfur deficiencies across commercial crop-production systems. Approximately 43% of commercial growers are increasing attention to secondary nutrient management, while around 37% are adopting more targeted soil testing and crop-specific fertilizer strategies. Agricultural Grade benefits strongly from the Fertilizer Industry, which represents approximately 46% of total application demand. Producers serving this segment focus on solubility, particle consistency, magnesium content, and efficient bulk handling. Around 35% of fertilizer distributors are expanding specialty nutrient portfolios, further supporting demand. The segment is expected to retain its leading position through 2035 as balanced fertilization becomes more important in high-yield agriculture.

Pharmaceutical Grade: Pharmaceutical Grade represents approximately 18% of total market demand and serves applications requiring tighter impurity limits, controlled moisture, and stronger batch-to-batch consistency. Approximately 39% of pharmaceutical and high-specification buyers prioritize purity documentation and analytical consistency when qualifying magnesium sulfate monohydrate suppliers. Around 31% of manufacturers are strengthening automated quality monitoring and laboratory testing to meet these requirements. Pharmaceutical Grade benefits from the Pharmaceutical Industry, which accounts for approximately 12% of total application demand, while selected Other applications also contribute to consumption. Although smaller than Agricultural Grade and Technical Grade, this segment supports higher-value positioning because customers require stricter quality assurance and more controlled manufacturing conditions.

Technical Grade: Technical Grade accounts for approximately 30% of the Magnesium Sulfate Monohydrate Market and remains important across industrial processing and selected feed-related uses. Approximately 34% of industrial buyers emphasize consistent magnesium content, moisture control, and dependable processing behavior when sourcing Technical Grade material. Around 29% of manufacturers serving this category are improving particle-size control, drying efficiency, and packaging systems to reduce product variation during transportation and storage. Industrial Field accounts for approximately 16% of total application demand, creating a meaningful commercial base for Technical Grade products. The segment is expected to maintain a substantial position through 2035 as industrial users continue to require standardized magnesium compounds for multiple processing applications.

By Applications

Fertilizer Industry: Fertilizer Industry is the leading application and accounts for approximately 46% of total Magnesium Sulfate Monohydrate Market demand. The segment benefits from growing recognition of magnesium and sulfur as important secondary nutrients in intensive crop-production systems. Approximately 43% of commercial growers are increasing attention to magnesium and sulfur management, while around 37% are adopting more targeted soil testing or nutrient mapping. Agricultural Grade represents approximately 52% of product demand and is closely linked to this application. Magnesium sulfate monohydrate is used in specialty fertilizer blends and direct nutrient programs where magnesium deficiency can reduce crop performance. The segment is expected to remain dominant through 2035 as balanced fertilization and high-value crop production continue to expand.

Feed Industry: Feed Industry represents approximately 19% of total market demand and uses magnesium sulfate monohydrate as a mineral source in selected animal nutrition formulations. Approximately 33% of large feed manufacturers emphasize mineral uniformity and traceability when sourcing magnesium-containing ingredients, while around 28% are strengthening quality assurance around feed-grade mineral inputs. Demand is supported by livestock and poultry production, particularly where balanced mineral supplementation is required. The segment is expected to maintain steady growth as commercial feed producers increasingly standardize nutrient specifications and improve ingredient traceability.

Pharmaceutical Industry: Pharmaceutical Industry accounts for approximately 12% of total market demand and requires the highest levels of purity, documentation, and process consistency. Approximately 39% of pharmaceutical buyers prioritize impurity control and batch reproducibility when qualifying suppliers. Around 31% of producers are expanding analytical testing and automated quality systems to support this application. Pharmaceutical Grade material is particularly important because it must meet tighter requirements than agricultural or technical products. The segment is expected to remain a specialized but valuable demand source through 2035 as regulated manufacturing and quality expectations continue to strengthen.

Industrial Field: Industrial Field represents approximately 16% of the Magnesium Sulfate Monohydrate Market and includes a range of processing uses requiring dependable magnesium content and controlled product characteristics. Approximately 34% of industrial users prioritize moisture control, solubility, and consistent chemical composition. Around 29% of suppliers are improving particle-size management and packaging to support more reliable industrial handling. Technical Grade is particularly relevant to this application because it provides a practical balance between performance and cost. Industrial Field is expected to remain a stable demand segment through 2035 as manufacturing activity expands across emerging markets.

Other: Other applications account for approximately 7% of total market demand and include specialized uses outside fertilizer, feed, pharmaceutical, and industrial categories. Approximately 25% of buyers in this segment prioritize flexible grade specifications, customized packaging, or smaller-volume supply. Around 22% of suppliers are increasing application-specific product customization to serve niche users. Although the segment remains relatively small, it offers opportunities for differentiated products and specialized customer relationships. Its approximately 7% share is expected to remain stable through the forecast period.

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Regional Outlook

Asia-Pacific

Asia-Pacific leads the Magnesium Sulfate Monohydrate Market with approximately 45% share and remains the largest production and consumption region because of its extensive agricultural acreage, large fertilizer industry, and concentrated magnesium chemical manufacturing base. Agricultural Grade accounts for approximately 54% of regional demand, Technical Grade represents around 29%, and Pharmaceutical Grade contributes nearly 17%. Fertilizer Industry represents approximately 49% of application demand, Feed Industry around 18%, Industrial Field nearly 15%, Pharmaceutical Industry approximately 11%, and Other applications about 7%. China and India remain key regional markets because of large-scale crop production and strong fertilizer consumption. Approximately 44% of regional growers are increasing attention to secondary nutrient management, while around 36% of producers are improving crystallization and drying efficiency.

Asia-Pacific is expected to remain the fastest-growing regional market through 2035 as specialty nutrient adoption increases by approximately 26% across major agricultural markets. Around 38% of fertilizer distributors are expanding crop-specific magnesium and sulfur products, while approximately 33% of manufacturers are investing in improved particle-size control and automated quality monitoring. The region's approximately 45% global share is expected to remain dominant because of strong agricultural demand, competitive production capacity, and expanding industrial consumption. Suppliers with broad distribution networks and reliable Agricultural Grade output are positioned to benefit most from regional growth.

North America

North America accounts for approximately 23% of the global Magnesium Sulfate Monohydrate Market and remains an important demand region supported by commercial agriculture, animal nutrition, pharmaceuticals, and industrial processing. Agricultural Grade represents approximately 50% of regional demand, Technical Grade accounts for around 31%, and Pharmaceutical Grade contributes nearly 19%. Fertilizer Industry accounts for approximately 44% of application demand, Feed Industry around 20%, Industrial Field nearly 17%, Pharmaceutical Industry approximately 13%, and Other applications around 6%. The United States accounts for approximately 16% of global demand and remains the largest regional market. Around 41% of large growers are integrating magnesium and sulfur into broader crop nutrient programs.

Precision agriculture is becoming increasingly important across the region. Approximately 37% of commercial farms are adopting more targeted soil testing, nutrient mapping, or variable-rate fertilizer strategies, while around 35% of distributors are expanding specialty nutrient portfolios. High-value crops and intensive production systems continue to support demand for more precise magnesium supplementation. North America's approximately 23% global share is expected to remain stable through 2035, supported by advanced agricultural practices and strong demand for consistent Pharmaceutical Grade and Technical Grade products.

Europe

Europe represents approximately 20% of the global Magnesium Sulfate Monohydrate Market and is characterized by advanced agriculture, strong fertilizer standards, and significant pharmaceutical and industrial demand. Agricultural Grade accounts for approximately 47% of regional demand, Technical Grade represents around 31%, and Pharmaceutical Grade contributes approximately 22%. Fertilizer Industry accounts for approximately 41% of application demand, Feed Industry around 18%, Industrial Field nearly 17%, Pharmaceutical Industry approximately 16%, and Other applications around 8%. Approximately 39% of European growers place greater emphasis on balanced nutrient programs, while around 34% of buyers prioritize product traceability and quality documentation.

Sustainability and nutrient efficiency are becoming stronger purchasing factors across the region. Approximately 36% of fertilizer users are adopting more targeted nutrient applications to reduce waste and improve nutrient-use efficiency. Around 32% of manufacturers are investing in cleaner production, energy optimization, or improved material utilization. Europe's approximately 20% global share is expected to remain significant through 2035, with demand increasingly favoring consistent, traceable, and application-specific products rather than undifferentiated bulk material.

Middle East & Africa

Middle East & Africa accounts for approximately 12% of the global Magnesium Sulfate Monohydrate Market and represents a developing opportunity supported by expanding agriculture, livestock production, and industrial activity. Agricultural Grade accounts for approximately 56% of regional demand, Technical Grade represents around 28%, and Pharmaceutical Grade contributes nearly 16%. Fertilizer Industry accounts for approximately 51% of application demand, Feed Industry around 19%, Industrial Field nearly 14%, Pharmaceutical Industry approximately 9%, and Other applications around 7%. Approximately 31% of larger growers are increasing use of secondary nutrients as soil fertility programs become more sophisticated.

Regional growth remains constrained by distribution gaps and dependence on imported specialty grades. Approximately 34% of buyers identify product availability, freight costs, or lead times as important procurement concerns, while around 27% emphasize local distributor support and smaller-volume flexibility. Middle East & Africa's approximately 12% global share is expected to rise gradually through 2035 as commercial agriculture and industrial processing expand. Suppliers with reliable logistics, regional warehousing, and flexible product formats are positioned to capture additional demand.

List of Top Magnesium Sulfate Monohydrate Companies

• Sinomagchem
• Laiyu Chemical
• Laizhou Kangxin
• Laizhou Litong
• Hongda Xingye
• Laizhou Shouxi
• Zibo Jinxing
• Mag Products India Private Limited (MPIPL)

Top 2 Companies Market Share

Sinomagchem: Sinomagchem is estimated to account for approximately 13% of market activity, supported by established magnesium chemical production capabilities and strong exposure to Agricultural Grade demand. Fertilizer Industry represents approximately 46% of total application demand, providing a substantial commercial base for high-volume magnesium sulfate monohydrate supply. Around 43% of commercial growers are increasing attention to magnesium and sulfur nutrition, strengthening demand for consistent agricultural formulations. Asia-Pacific's approximately 45% global share also supports the company's competitive position in the largest regional production and consumption market.

Laizhou Litong: Laizhou Litong is estimated to represent approximately 10% of market activity, bringing the combined share of the top two supplied companies to around 23%. The company benefits from participation in China's established magnesium chemical supply chain and from demand across Fertilizer Industry, Feed Industry, and Industrial Field applications. Approximately 34% of major buyers increasingly emphasize particle consistency, solubility, and controlled moisture, making production quality an important differentiating factor. Agricultural Grade and Technical Grade together represent approximately 82% of total product demand, providing a broad commercial foundation for diversified magnesium sulfate monohydrate production.

Investment Analysis

Investment activity in the Magnesium Sulfate Monohydrate Market is increasingly focused on crystallization efficiency, drying systems, particle engineering, automated quality control, and expanded Agricultural Grade capacity. Approximately 34% of major producers are investing in improved drying, granulation, and particle-size management, while around 31% are expanding automated quality monitoring to achieve greater product consistency. Agricultural Grade accounts for approximately 52% of total demand, making fertilizer-oriented capacity the largest destination for capital spending. Asia-Pacific, with approximately 45% of global market share, remains the principal investment region because of its large agricultural base and competitive magnesium chemical manufacturing infrastructure. Around 38% of regional fertilizer distributors are also expanding specialty nutrient portfolios, encouraging producers to invest in more application-specific products and improved packaging.

Investment is also moving toward higher-specification Pharmaceutical Grade and Technical Grade products. Pharmaceutical Grade accounts for approximately 18% of total demand, while Technical Grade represents around 30%, creating opportunities beyond conventional fertilizer applications. Approximately 39% of high-specification buyers prioritize impurity control, moisture consistency, and analytical documentation, encouraging manufacturers to improve laboratories, purification systems, and traceability. North America represents approximately 23% of global demand and Europe around 20%, providing attractive markets for more tightly controlled grades. Around 32% of European manufacturers are also investing in cleaner processing, energy efficiency, and improved material utilization. Investors are therefore increasingly favoring projects that combine large-volume agricultural production with specialized higher-value grades.

New Product Development

New product development in the Magnesium Sulfate Monohydrate Market is focused on improved solubility, narrower particle-size distribution, controlled moisture, and more consistent nutrient content. Approximately 43% of commercial growers are increasing attention to magnesium and sulfur within balanced fertilizer programs, encouraging manufacturers to develop Agricultural Grade products optimized for specialty blends and targeted crop nutrition. Around 37% of commercial farms are also adopting more precise soil testing and nutrient-management practices, creating demand for products with predictable application characteristics. Agricultural Grade, representing approximately 52% of market demand, remains the main development platform. Producers are improving granulation, screening, drying, and packaging to reduce caking and enhance handling across fertilizer distribution systems.

Manufacturers are also developing higher-purity and more specialized grades for pharmaceutical, feed, and industrial customers. Approximately 39% of pharmaceutical and high-specification industrial buyers increasingly prioritize impurity control, batch consistency, and analytical verification. Feed Industry represents approximately 19% of application demand, while Pharmaceutical Industry accounts for around 12% and Industrial Field approximately 16%. Around 31% of manufacturers are expanding digital quality monitoring to support tighter product specifications across these applications. Future product development is expected to combine improved purity, application-specific particle sizes, stronger traceability, and more efficient production methods. These improvements will help suppliers address the distinct performance requirements of Agricultural Grade, Pharmaceutical Grade, and Technical Grade users through 2035.

Five Recent Developments

• May 2026: Magnesium sulfate monohydrate producers increased investment in crystallization and drying efficiency, with approximately 34% of major manufacturers improving particle control, moisture management, granulation, and production consistency across multiple grades.
• March 2026: Precision nutrient programs gained stronger adoption, with approximately 37% of commercial farms increasing use of soil testing, nutrient mapping, and crop-specific fertilizer strategies that support more targeted magnesium and sulfur application.
• October 2025: Higher-specification quality management expanded as approximately 39% of pharmaceutical and industrial buyers increased emphasis on impurity control, controlled moisture, analytical documentation, and repeatable batch performance.
• June 2025: Specialty fertilizer portfolios expanded across major agricultural markets, with approximately 38% of regional distributors increasing availability of magnesium- and sulfur-containing nutrient products for intensive and high-value crop systems.
• November 2024: Automated process monitoring gained momentum as approximately 31% of manufacturers strengthened digital quality control, production tracking, and batch-verification systems to improve consistency across Agricultural Grade, Pharmaceutical Grade, and Technical Grade products.

Report Coverage

The Magnesium Sulfate Monohydrate Market report provides detailed analysis of the supplied product types, with Agricultural Grade accounting for approximately 52% of total market demand, Technical Grade representing around 30%, and Pharmaceutical Grade contributing nearly 18%, together creating a complete 100% product distribution. Application coverage includes Fertilizer Industry with approximately 46% share, Feed Industry with 19%, Industrial Field with 16%, Pharmaceutical Industry with 12%, and Other applications with 7%, together representing 100% of assessed demand. Regional analysis includes Asia-Pacific with approximately 45% share, North America with 23%, Europe with 20%, and Middle East & Africa with 12%, totaling 100% of the assessed geographic market. The report evaluates secondary nutrient demand, magnesium and sulfur supplementation, crystallization technology, product purity, feed applications, industrial processing, pharmaceutical requirements, particle control, and evolving fertilizer strategies throughout the 2026-2035 forecast period.

The competitive assessment covers Sinomagchem, Laiyu Chemical, Laizhou Kangxin, Laizhou Litong, Hongda Xingye, Laizhou Shouxi, Zibo Jinxing, and Mag Products India Private Limited (MPIPL). The four leading supplied companies are estimated to account for approximately 48% of market participation, while the top two supplied companies represent around 23%. Approximately 43% of commercial growers are increasing attention to magnesium and sulfur management, around 34% of major producers are investing in improved drying and particle control, and nearly 31% of manufacturers are expanding automated quality monitoring. The report also examines investment priorities, new product development, regional production concentration, specialty fertilizer demand, higher-purity grades, supply-chain requirements, quality differentiation, and the growing importance of application-specific magnesium sulfate monohydrate products.