HS Code for Lithium silicate

Lithium silicate is classified under HS code 2839.90. This subheading covers silicates and commercial alkali metal silicates other than those of sodium. Since lithium is an alkali metal, its silicate form falls into this "other" category. The classification is based on the chemical structure of the compound, which consists of lithium and silicon oxides. It is frequently used in industrial applications such as concrete surface treatments, specialized coatings, and as a binder in welding rods. Under Chapter 28, the product must be a separate chemically defined compound. Lithium silicate is often sold as an aqueous solution, which is permitted under the chapter notes for Heading 2839. The classification is determined by the cation (lithium) and the anion (silicate), ensuring it is placed among other alkali metal silicates excluding sodium-based versions.

Products Included

• Lithium orthosilicate
• Lithium metasilicate
• Aqueous lithium silicate solutions
• Concrete densifiers based on lithium silicate
• Lithium silicate powder

Common Misclassification

Common misclassifications include 2839.11 or 2839.19, which are reserved for sodium silicates (water glass). Because sodium silicates are more common in trade, exporters often default to these codes. Additionally, if the product is a complex mixture for construction containing polymers or other additives, it might be wrongly classified under 3824.40 as a prepared additive for cements or mortars.

FAQ

What is the HS code for Lithium silicate?

The HS code for lithium silicate is 2839.90.

Why is it not classified under 2839.19?

HS code 2839.19 is specifically for sodium silicates; lithium silicates must be classified under the "other" category of 2839.90 because lithium is a different alkali metal.