Oman Chemical is a world-famous manufacturer, supplier, and exporter of Lab chemicals. Our RXSOL-60-6262-500 Calcium sulfate is a calcium salt that is used for a variety of purposes including: building materials, as a desiccant, in dentistry as an impression material, cast, or die, and in medicine for immobilizing casts and as a tablet excipient. It exists in various forms and states of hydration.