Sodium hydroxide (caustic soda); in aqueous solution (soda lye or liquid soda)

HS code 281512 covers the import and export of sodium hydroxide, also known as caustic soda, in aqueous solution. Sodium hydroxide is a highly versatile chemical compound with a wide range of industrial applications, making it a crucial component in various manufacturing processes. As a key ingredient in the production of soaps, detergents, paper, and textiles, the global demand for sodium hydroxide remains strong, underscoring its importance within the broader chemical industry.

Sodium hydroxide in aqueous solution is primarily produced through the electrolysis of a sodium chloride (salt) solution. This process involves passing an electric current through the salt solution, which separates the sodium and chloride ions. The sodium ions then react with water to form sodium hydroxide and hydrogen gas. The resulting sodium hydroxide solution is then concentrated and purified to meet industry standards.

The main inputs required for the production of sodium hydroxide in aqueous solution include salt (sodium chloride), water, and electricity to power the electrolysis process. Additionally, specialized equipment such as electrolytic cells, evaporators, and storage tanks are necessary for the various stages of production.

The primary output of HS code 281512 is sodium hydroxide in aqueous solution, which is then used as a key ingredient in the manufacture of a wide range of products. These include 340211 Organic surface-active agents (other than soap, 470000 (Pulp of wood or of other fibrous cellulosic material; recovered (waste and scrap) paper or paperboard), and 540000 Textile fibres. The versatility of sodium hydroxide ensures a consistent demand from various industries, making it an essential chemical commodity in the global market.