Sodium hydroxide is a strong alkaline compound that is mainly used to make soap, hard soap, paper, cellulose and graphene. It is also widely used in water treatment and sewage treatment to neutralize acidic solutions and precipitate heavy metal ions, thus purifying water sources. In addition, sodium hydroxide plays an important role in petrochemical production and is used in oil refining, synthetic rubber, paints and plastics. In addition, it is used to make cleaning agents and disinfectants with good corrosive and bactericidal effects, and is suitable for cleaning dishes, bathrooms and medical equipment. Finally, sodium hydroxide is also an important raw material in the production of pharmaceutical preparations and cosmetics, and can be used to make hormones, antibiotics, spices and lipsticks.