Solubility: Gypsum Is moderately soluble in drinking water, which has a solubility of about 2 grams for every liter at 25°C. Apparently, gypsum exhibits retrograde solubility, meaning its solubility decreases as drinking water temperature raises – in contrast to most salts that develop into additional soluble in warm drinking water. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050