Solubility: Gypsum Is moderately soluble in drinking water, by using a solubility of about two grams for every liter at 25°C. Interestingly, gypsum reveals retrograde solubility, this means its solubility decreases as water temperature increases – not like most salts that come to be extra soluble in incredibly hot water. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050