Solubility: Gypsum is reasonably soluble in water, using a solubility of about two grams for every liter at 25°C. Curiously, gypsum displays retrograde solubility, which means its solubility decreases as water temperature raises – as opposed to most salts that come to be more soluble in hot h2o. Radiation Shielding: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050