Solubility: Gypsum Is moderately soluble in drinking water, with a solubility of about 2 grams per liter at twenty five°C. Apparently, gypsum displays retrograde solubility, this means its solubility decreases as water temperature raises – in contrast to most salts that turn into extra soluble in very hot drinking water. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050