Solubility: Gypsum is reasonably soluble in water, that has a solubility of about 2 grams for each liter at 25°C. Apparently, gypsum displays retrograde solubility, which means its solubility decreases as drinking water temperature raises – contrary to most salts that become additional soluble in hot h2o. Agriculture: Soil Conditioner: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050