Valued at USD 4,169.88 million in 2025, the calcium sulfate market is projected to reach USD 4,699.12 million in 2026 and USD 12,379.11 million by 2034, growing at a CAGR of 12.9% during the forecast period 2026–2034. Key players include BASF, Knauf Group, LafargeHolcim, Saint-Gobain, USG Corporation, GMCI, Foodchem International Corporation, and Junsei Chemical Co., Ltd. Growth is fueled by industrial byproduct recycling mandates and sustainable material requirements across construction, agriculture, food, and pharmaceutical industries.

Construction Anchors Calcium Sulfate Market Demand

The building and construction segment dominated the calcium sulfate market with a 28.9% share in 2025, driven by extensive use in wallboards, plasters, and flooring systems. Gypsum, the dihydrate form, is a major component of drywall, plasters, and cement board, and the shift toward lightweight, energy-efficient building materials continues to drive the uptake of gypsum board globally. In its hemihydrate form, commonly called plaster of Paris, calcium sulfate is widely used in drywall, flooring compounds, and decorative plasters, where fire resistance, workability, and setting time make it a preferred choice. Plaster of Paris also sets quickly when mixed with water, supporting building repairs, art, and medical casts. According to a June 2024 RICS report quoting Oxford Economics, global construction output is projected to grow by USD 4.2 trillion over the next 15 years.

Synthetic Gypsum Strengthens Supply Reliability

Availability of both natural and synthetic sources supports a scalable supply chain. A 2024 Mineral Commodity Summaries report indicates that synthetic gypsum production reached roughly 15 million tons in 2023, representing about one-third (33%) of the total US gypsum supply. This dual-sourcing approach lets manufacturers tailor purity levels and physical properties to specific applications while limiting supply risk and stabilizing production costs. The expansion of synthetic gypsum is also linked to environmental regulations and waste reduction requirements, signaling a sustainability shift and reduced reliance on natural gypsum.

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Agricultural Demand for Calcium Sulfate as a Soil Conditioner

Agriculture is the second pillar of demand. As a soil conditioner, calcium sulfate improves soil structure, reduces compaction, improves water infiltration, and supports root development, while supplying calcium and sulfur without altering soil pH. A March 2025 SMS Foundation report highlighted severe soil salinity affecting 4,000 acres in Haryana's Kheda Khalilpur village, and a 2023 initiative promoting gypsum reduced salinity and lowered farming costs by USD 18 to USD 24 per acre. In April 2025, SUL4R-PLUS inaugurated a calcium sulphate fertilizer plant in Marissa, Illinois, with a production capacity of 100,000 tons per year. In Asia Pacific, agricultural economies such as Vietnam and Indonesia are increasingly adopting calcium sulfate as a soil conditioner for soil treatment and crop enhancement.

Food-Grade Calcium Sulfate Gains Traction in Processed Food

The food segment is expected to witness substantial growth at a 6.8% CAGR during the forecast period, owing to rising demand for food-grade calcium sulfate as a safe and multifunctional additive. It is used as a firming agent, dough conditioner, and calcium supplement in bakery items, canned vegetables, and tofu, and it also acts as a thickener, stabilizer, and emulsifier that maintains texture and regulates acidity. The shift toward clean-label and nutritionally improved products, together with regulatory approvals across global markets, provides a strong foundation for consistent demand from manufacturers that rely on food-grade calcium sulfate.

Regional Landscape and Competitive Outlook

Asia Pacific led the calcium sulfate market with a 39.40% revenue share in 2025, attributed to robust construction activity, growing agricultural output, and expanding food processing, particularly in China and India. North America is projected to grow at a 5.1% CAGR, supported by advanced infrastructure and a mature food processing industry. By product type, the gypsum segment is expected to record the fastest growth at a 20.4% CAGR. BASF, for instance, offers R+D HyCon GYP 1789 L, an accelerator for the hydration reaction of gypsum in construction applications. Mining-related regulations remain a potential challenge for the industry.

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