Sodium Metasilicate Pentahydrate Powder
Crystalline powder form of sodium metasilicate with five water molecules, widely used in heavy-duty cleaners and laundry detergents. It qualifies for HTS 2839.90.5000 as a commercial alkali metal silicate outside the specific sodium silicate subheadings.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If blended with calcium or other earth metals
Calcium silicates fall under separate subheadings for non-alkali silicates.
If pre-mixed into detergent formulations for retail
Prepared detergents shift to Chapter 34, excluding pure inorganic compounds.
If prepared as anti-freeze or heat transfer fluid additive
Prepared chemical additives for specific uses are reclassified per exclusions.
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Import Tips & Compliance
• Label with exact hydrate form and SiO2/Na2O ratio for accurate duty assessment
• Comply with TSCA for US imports to avoid environmental agency scrutiny
Related Products under HTS 2839.90.50.00
Sodium Silicate Solution (Water Glass)
A viscous, aqueous solution of sodium silicate, commonly known as water glass, used in detergents, adhesives, and as a concrete sealant. It falls under HTS 2839.90.5000 as a commercial alkali metal silicate, specifically sodium silicate in its soluble form, distinct from solid or fused varieties.
Potassium Silicate Liquid
A clear liquid solution of potassium silicate used in specialty paints, welding electrodes, and fireproofing agents. Classified under HTS 2839.90.5000 as a commercial alkali metal silicate, emphasizing its potassium base and soluble state.
Anhydrous Sodium Silicate Powder
Dehydrated powder of sodium silicate used in specialty ceramics and investment casting. Classified in HTS 2839.90.5000 as an 'other' form of commercial sodium silicate, lacking water of hydration.
Rubian's Sodium Silicate for Detergents
Proprietary commercial grade sodium silicate optimized for phosphate-free detergents. HTS 2839.90.5000 covers this as 'other' alkali metal silicate tailored for cleaning applications.
PQ Corporation Sodium Silicate N
Neutral-density sodium silicate (SiO2:Na2O ratio ~3.2) for adhesives and catalysts. Fits HTS 2839.90.5000 as a commercial variant of alkali metal silicates.
Lithium Silicate Solution
Aqueous solution of lithium silicate for concrete densifiers and protective coatings. It is included under HTS 2839.90.5000 as a commercial alkali metal silicate, with lithium as an alkali metal.