... Heptahydrate MedicineGradeTianjin Xinxin Chemical Factory is the largest manufacture of Zinc Sulfate(30,000Tons/Year),Calcium Hypochlorite (30, ... liquid ammonia and ketone, tending to lose water molecules of hydration in dry air and become white powder appearance ... decompose2)Usage:Usually used as key component of oral liquid, tablets, eyedrops, essential components of many new and special medicine.3 ...