Sulphites; of sodium

HS code 283210 covers the classification of sodium sulphites, a group of chemical compounds that play a crucial role in various industries. Sodium sulphites are widely used as preservatives, antioxidants, and pH regulators, making them an essential component in the food, beverage, and pharmaceutical sectors. This code is of significant importance in the global trade of chemicals, as sodium sulphites are extensively utilized across a diverse range of applications, contributing to the overall economic landscape.

The production of sodium sulphites typically involves the reaction of sodium hydroxide or sodium carbonate with sulfur dioxide. This process can be carried out through various methods, including the Claus process, the contact process, or the wet scrubbing technique. The resulting sodium sulphite solution is then purified and crystallized to obtain the final product.

The main inputs required for the production of sodium sulphites include sulfur dioxide, sodium hydroxide or sodium carbonate, and energy sources for the chemical reactions and purification processes. Additionally, specialized equipment such as reactors, crystallizers, and filtration systems are necessary to ensure efficient and high-quality production.

The primary output of HS code 283210 is sodium sulphite, which is then used as an input for various other industries. Sodium sulphites find applications in 200300 Food Preserves as a preservative, in 300490 Medicaments as an antioxidant, and in 320290 Tanning and Dyeing Extracts as a pH regulator. The versatility of sodium sulphites makes them an essential commodity in the global chemical trade.