Usage:
The anhydrous form used as a drying and dehydrating agent for organic liquids and gases, and in desiccators. The dihydrate and hexahydrate forms are used for antifreeze and refrigerating solns, in fire extinguishers, etc. (a 40% soln freezes at -41 deg); to preserve wood, stone; manuf ice, glues, cements; fireproofing fabrics; automobile antifreeze mixtures; to melt ice and snow; as coagulant in rubber manuf, as size in admixture with starch paste; in concrete mixes to give quicker initial set and greater strength; freeze proofing of coal and ores; dust control on unpaved roads; sizing and finishing cotton fabrics; as brine for filling inflatable tires on tractors to increase traction.
