Sulphites; of sodium

HS code 283210 covers the classification of sodium sulphites, a group of chemical compounds that play a vital 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 significant within the broader chemical industry, as sodium sulphites contribute to the production of a diverse range of consumer and industrial products.

The production of sodium sulphites typically involves the reaction of sodium hydroxide (NaOH) with sulfur dioxide (SO2). This process can be carried out through various methods, including the direct absorption of SO2 gas into a sodium hydroxide solution, or the neutralization of sulfurous acid (H2SO3) with sodium hydroxide. The resulting sodium sulphite solution is then dried or crystallized to obtain the final product.

The main inputs required for the production of sodium sulphites include sulfur dioxide (SO2), sodium hydroxide (NaOH), and various energy sources, such as electricity or steam, to power the production equipment. Additionally, specialized machinery, such as reactors, evaporators, and drying equipment, are necessary for the efficient and large-scale manufacture of these chemicals.

Sodium sulphites produced under HS code 283210 are primarily used as preservatives, antioxidants, and pH regulators in the food, beverage, and pharmaceutical industries. They are often consumed by industries classified under codes such as 210690 Food preparations not elsewhere specified or included, 220900 Vinegar and substitutes for vinegar obtained from acetic acid, and 300490 Medicaments consisting of mixed or unmixed products for therapeutic or prophylactic uses, put up in measured doses or in forms or packings for retail sale. The versatility of sodium sulphites makes them an essential ingredient in a wide range of consumer and industrial products.