Solubility: Gypsum is reasonably soluble in h2o, which has a solubility of about two grams for each liter at twenty five°C. Apparently, gypsum exhibits retrograde solubility, this means its solubility decreases as drinking water temperature improves – unlike most salts that grow to be more soluble in incredibly hot water. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050