Solubility: Gypsum Is reasonably soluble in water, by using a solubility of about 2 grams for each liter at 25°C. Curiously, gypsum displays retrograde solubility, meaning its solubility decreases as water temperature will increase – not like most salts that turn into far more soluble in hot drinking water. Gypsum, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050