Calcium chloride (CaCl₂) serves diverse markets: deicing and dust control, oil and gas (drilling fluids, completion brines), concrete acceleration, desiccants, and food/pharma grades. Production follows two main routes. First, synthetic CaCl₂ is co-produced from the Solvay process when soda ash facilities neutralize calcium carbonate residues with hydrochloric acid, yielding concentrated brines that are evaporated and flaked or prilled.