Solubility: Gypsum Is moderately soluble in water, with a solubility of about two grams for each liter at 25°C. Curiously, gypsum reveals retrograde solubility, that means its solubility decreases as h2o temperature boosts – in contrast to most salts that turn into much more soluble in very hot water. Gypsum, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050