Co.,website- http://www.hanhai.net.cn Gypsum experimental data Merit number Unit of measurement Average Silicon dioxide竊�iO2竊�% 2.89 n.indian red(SO3) % 0.33 Alchlor竊�L2O3竊�% 0.97 Calcium oxide 竊�aO竊�% 30.54 Magnesia(MgO) % 1.69 Sulfur trioxide(SO3) % 38.56 Yeast autolysate % 3.79 Attached water % 0.14 Crystal water, water of crystallization % 15.27