Solubility: Gypsum Is reasonably soluble in h2o, that has a solubility of about 2 grams for each liter at 25°C. Interestingly, gypsum exhibits retrograde solubility, which means its solubility decreases as drinking water temperature boosts – unlike most salts that turn out to be far more soluble in warm h2o. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050