Sulphites; other than of sodium

HS code 283220 covers sulphites, excluding those of sodium. Sulphites are a class of chemical compounds that play a vital role in various industries, including food preservation, water treatment, and pharmaceutical manufacturing. As a key ingredient in many products, the sulphites industry is an essential component of the broader chemical and manufacturing sectors, contributing to the global economy.

The production of sulphites, other than sodium sulphite, typically involves the reaction of sulfur dioxide (SO2) with various alkaline or alkaline earth metal compounds. This process can be carried out through a range of methods, such as direct absorption of SO2 into a solution of the desired metal, or the reaction of sulfur dioxide with a metal oxide or hydroxide. The resulting sulphite compounds are then purified and processed for use in various applications.

The main inputs required for the production of sulphites, other than sodium sulphite, include sulfur dioxide (SO2), which is the primary raw material, as well as various metal compounds such as calcium, magnesium, or potassium compounds. Additionally, the production process may require specialized equipment, such as reaction vessels, filtration systems, and drying or crystallization units, to ensure the quality and consistency of the final product.

The primary output of HS code 283220 is sulphite compounds, which are used in a variety of industries. These sulphites may be consumed by other chemical manufacturers, 283210 Sulphites of sodium, or used directly in applications such as food preservation, water treatment, or pharmaceutical formulations. The specific end-use of the sulphites produced under this code will depend on the type of metal compound used and the desired properties of the final product.