Solubility: Gypsum Is reasonably soluble in water, with a solubility of about two grams for every liter at 25°C. Curiously, gypsum exhibits retrograde solubility, which means its solubility decreases as drinking water temperature raises – compared with most salts that become additional soluble in hot drinking water. Map of gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050