Solubility: Gypsum Is moderately soluble in drinking water, using a solubility of about two grams for each liter at 25°C. Curiously, gypsum displays retrograde solubility, this means its solubility decreases as water temperature raises – contrary to most salts that turn out to be additional soluble in scorching water. Agriculture: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050