HS Code for Sodium metasilicate

Sodium metasilicate is classified under HS code 2839.11. This code falls under Heading 2839, which covers silicates and commercial alkali metal silicates. The subheading 2839.11 is specifically designated for sodium metasilicates. Sodium metasilicate is an inorganic salt formed by the combination of sodium oxide and silica in a 1:1 molar ratio. It is available in several forms, including anhydrous (Na2SiO3) and various hydrated forms like the pentahydrate or nonahydrate. All these forms are covered under 2839.11 as long as they maintain the metasilicate structure. This chemical is highly valued for its alkalinity and its ability to emulsify fats and oils, making it a common ingredient in industrial and household detergents, as well as in metal cleaning, textile processing, and the pulp and paper industry. It is also used to stabilize hydrogen peroxide bleaches and as a binder in ceramics. In the context of the Harmonized System, the distinction between metasilicates and other silicates, such as sodium orthosilicate or commercial water glass solutions, is important. Other sodium silicates that do not meet the metasilicate definition are classified under 2839.19. If sodium metasilicate is blended with surfactants, builders, or other additives to create a finished cleaning product, the classification shifts to Chapter 34. However, as a pure, chemically defined substance, it remains in Chapter 28. The classification is determined by GRI 1, which prioritizes the specific terms of the heading and subheading that most accurately describe the chemical composition of the product.

Products Included

• Sodium metasilicate anhydrous
• Sodium metasilicate pentahydrate
• Sodium metasilicate nonahydrate
• Granular sodium metasilicate
• Technical grade sodium metasilicate for detergents

Common Misclassification

Sodium metasilicate is often confused with 2839.19, which covers other sodium silicates like liquid sodium silicate (water glass). It is also frequently misclassified under 3402.20 or 3402.90 when it is a component of a detergent preparation rather than a pure chemical. It should also be distinguished from magnesium silicates (2839.90).

FAQ

What is the HS code for Sodium metasilicate?

The HS code for sodium metasilicate is 2839.11.

Does the hydration level change the HS code?

No, whether the sodium metasilicate is anhydrous, pentahydrate, or nonahydrate, it remains classified under 2839.11.