Solubility: Gypsum is reasonably soluble in drinking water, that has a solubility of about 2 grams for each liter at 25°C. Interestingly, gypsum exhibits retrograde solubility, that means its solubility decreases as h2o temperature boosts – unlike most salts that turn into extra soluble in hot drinking water. Radiation Shielding: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050