Solubility: Gypsum Is moderately soluble in water, having a solubility of about 2 grams for every liter at 25°C. Apparently, gypsum displays retrograde solubility, which means its solubility decreases as drinking water temperature will increase – not like most salts that turn out to be more soluble in warm h2o. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050