Introduction to Calcium Sulphate: The Versatile Inorganic Compound Calcium sulphate, chemically represented as CaSO₄ with CAS number 7778-18-9, is a fundamental inorganic compound that exists in multiple crystalline forms including anhydrous calcium sulphate, hemihydrate (CaSO₄·0.5H₂O), and dihydrate (CaSO₄·2H₂O) . This white, odorless powder plays a critical role across diverse industrial sectors due to its unique physical and chemical properties, including excellent fire resistance, sound insulation capabilities, and biocompatibility. The global calcium sulphate market represents a significant economic sector, with 2024 valuations reaching approximately $11.2 billion and projected growth to $16.07 billion by 2030, reflecting a compound annual growth rate of 6.20% . This expansion is driven by increasing demand across…