HS Code for Lignin sulfonates

Heading 3804.00 covers residual lyes from the manufacture of wood pulp. Lignin sulfonates, also known as lignosulphonates, are water-soluble anionic polyelectrolyte polymers which are byproducts from the production of wood pulp using sulfite pulping. This classification includes these substances whether they are in a concentrated form, desugared, or chemically treated. The classification logic relies on the origin of the product as a chemical byproduct of the paper and pulp industry. It is important to note that this heading specifically includes lignin sulfonates but excludes tall oil, which is classified under heading 3803. The chemical treatment mentioned in the HS description allows for various salts (calcium, sodium, magnesium) to be included here. These materials are widely used as dispersants, binders, and concrete admixtures. Classification is governed by the chemical composition and the industrial process from which the substance is derived, ensuring that these specific organic chemicals are grouped with other residual lyes rather than pure organic chemicals in Chapter 29. The broad nature of 3804.00 allows for various physical states, including liquid concentrates or dried powders, provided they maintain the chemical identity of a residual lye byproduct.

Products Included

• Calcium lignosulfonate
• Sodium lignosulfonate
• Magnesium lignosulfonate
• Concentrated sulfite lyes
• Desugared lignin sulfonates

Common Misclassification

Lignin sulfonates are sometimes misclassified under 3803.00, which is reserved for tall oil, another byproduct of the wood pulp industry. They may also be confused with prepared binders for foundry molds under 3824.10. However, because lignin sulfonates are specifically named in the description for 3804.00, that heading takes precedence according to GRI 1.

FAQ

What is the HS code for lignin sulfonates?

Lignin sulfonates are classified under HS code 3804.00 as part of residual lyes from the manufacture of wood pulp.

Are chemically treated lignin sulfonates still under 3804.00?

Yes, the HS description explicitly includes lignin sulfonates whether or not they have been chemically treated or desugared, as long as they remain residual lyes from wood pulp production.