Solubility: Gypsum is reasonably soluble in water, using a solubility of about two grams for each liter at 25°C. Curiously, gypsum exhibits retrograde solubility, which means its solubility decreases as drinking water temperature will increase – contrary to most salts that grow to be extra soluble in very hot h2o. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050