Solubility: Gypsum is reasonably soluble in water, which has a solubility of about 2 grams per liter at 25°C. Apparently, gypsum exhibits retrograde solubility, that means its solubility decreases as drinking water temperature raises – as opposed to most salts that grow to be much more soluble in scorching water. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050