HS Code for Ion-exchange resin

Ion-exchange resins are polymers that act as a medium for ion exchange. They are classified under HS code 3914.00. This heading is unique because it covers "Ion-exchangers based on polymers of headings 39.01 to 39.13, in primary forms." According to the Chapter 39 notes, primary forms include liquids, pastes, blocks, lumps, powders, granules, and flakes. These resins are typically cross-linked polystyrene or acrylic polymers that have been functionalized with acidic or basic groups. Because the primary function of the material is ion exchange, and it is based on synthetic polymers, it is excluded from general polymer headings (like 3903 for polystyrene) and placed into this specific functional category. This classification is used for resins employed in water softening, purification, and metal separation processes.

Products Included

• Cation exchange resins
• Anion exchange resins
• Chelating resins
• Mixed bed ion-exchange resins
• Sulfonated polystyrene resins
• Amberlite and similar functional polymers

Common Misclassification

These resins are often misclassified under 3824.99 (chemical products not elsewhere specified) or under the specific polymer headings such as 3903.90 (other polystyrene). However, Note 6 to Chapter 39 specifically directs ion-exchangers to heading 3914. Another common error is using 8421.21 for the resin itself; 8421.21 is for water filtering machinery, not the chemical resin media.

FAQ

What is the HS code for ion-exchange resin?

The HS code for ion-exchange resin in primary forms is 3914.00.

Are ion-exchange resins in cartridges classified here?

No, if the resin is already contained within a cartridge or housing for use in a machine, it is usually classified as a part of a filtering apparatus under HS code 8421.