Solubility: Gypsum is moderately soluble in drinking water, that has a solubility of about two grams for each liter at 25°C. Apparently, gypsum exhibits retrograde solubility, indicating its solubility decreases as water temperature boosts – compared with most salts that grow to be far more soluble in very hot water. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050