Sodium hydroxide, commonly known as lye or caustic soda, is a highly versatile chemical with a wide range of applications. It is primarily used in the manufacturing of soap, detergents, and various cleaning agents. Additionally, sodium hydroxide plays a critical role in the production of paper, textiles, and water treatment processes. Its strong alkaline properties make it effective for pH regulation and neutralization of acids. Safety precautions are essential when handling sodium hydroxide due to its corrosive nature.