Solubility: Gypsum Is moderately soluble in water, with a solubility of about 2 grams for each liter at 25°C. Apparently, gypsum displays retrograde solubility, indicating its solubility decreases as water temperature improves – compared with most salts that turn out to be additional soluble in incredibly hot drinking water. Reactivity: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050