Solubility: Gypsum is moderately soluble in water, with a solubility of about 2 grams for each liter at 25°C. Curiously, gypsum reveals retrograde solubility, indicating its solubility decreases as h2o temperature raises – not like most salts that come to be more soluble in hot water. Soil h2o likely checking: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050