Solubility: Gypsum is moderately soluble in drinking water, using a solubility of about 2 grams for each liter at 25°C. Interestingly, gypsum reveals retrograde solubility, meaning its solubility decreases as water temperature boosts – contrary to most salts that grow to be much more soluble in incredibly hot drinking water. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050