Solubility: Gypsum Is reasonably soluble in water, which has a solubility of about two grams for each liter at 25°C. Interestingly, gypsum exhibits retrograde solubility, this means its solubility decreases as drinking water temperature raises – as opposed to most salts that develop into extra soluble in very hot h2o. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050