Solubility: Gypsum is moderately soluble in h2o, that has a solubility of about two grams for every liter at twenty five°C. Apparently, gypsum exhibits retrograde solubility, this means its solubility decreases as drinking water temperature increases – in contrast to most salts that become more soluble in very hot water. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050