Additional threats to employees are posed by. the ease with which many corrosive chemicals ignite, explode or react with incompatible substances. In North Carolina, the N.C. Department of Labor enforces the federal Occupational Safety and Health Act through a. state plan approved by the U.S. Department of Labor.
Calcium sulfate (or calcium sulphate) is a common laboratory and industrial chemical. In the form of Î³- anhydrite (the nearly anhydrous form), it is used as a desiccant. It is also used as a coagulant in products like tofu. In the natural state, unrefined calcium sulfate is a translucent, crystalline white rock.
Ca3(PO4)2 + 3H2SO4 2H3PO4 + 3CaSO4. The insoluble calcium sulphate is then separated from the phosphoric acid, most usually. by ï¬ltration. The reaction between phosphate rock and sulphuric acid is self-limiting because an. insoluble layer of calcium sulphate forms on the surface of the particles of the rock.