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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in fused solid blocks or lumps
Fused sodium silicates have a specific subheading apart from powders.
If chemically modified for foundry use
Prepared foundry chemicals exclude pure silicates per chapter exclusions.
If fired into refractory bricks
Processed refractory products of silicates fall under Chapter 69.
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Import Tips & Compliance
• Confirm anhydrous status with moisture analysis to prevent hydrate misclassification
• Dust hazard precautions required; use proper SDS for customs clearance
• Industrial buyers often need end-use certificates for verification
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.
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.
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.