Potassium Waterglass Powder (Technical Grade)
Anhydrous potassium silicate powder derived from spray-dried liquid, used in foundry molds and refractory cements. Classified under HTS 2839.90.1000 as a commercial potassium silicate, meeting Chapter 28 definitions for inorganic compounds. Ideal for applications needing high-temperature binding.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If actually sodium silicate powder
Sodium silicates have a separate subheading; potassium-specific docs prevent reclassification.
If used as refractory cement binder in set form
Prepared refractories or cements containing silicates fall under heading 3816.
If natural kaolin or clay-based silicate
Natural earth silicates are in Chapter 25, not synthetic commercial silicates.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide assay certificates showing >95% silicate content to distinguish from mixtures
• Dust hazard precautions required; label as irritant and ensure proper packaging for air/sea freight
Related Products under HTS 2839.90.10.00
Liquid Potassium Silicate KAS-10
KAS-10 is a high-ratio potassium silicate liquid (SiO2:K2O = 3.3:1) for specialty coatings and soil stabilizers. It qualifies under HTS 2839.90.1000 as a chemically defined commercial silicate of potassium. Commonly imported for agricultural and construction uses.
AgSil 16H Potassium Silicate Fertilizer Grade
AgSil 16H is a horticultural potassium silicate solution (2.5:1 ratio) for plant nutrition and disease resistance. Still classified under HTS 2839.90.1000 as a commercial potassium silicate, not as a fertilizer preparation. Imported for greenhouse and hydroponics.
Potassium Silicate Solution (PQ Corporation Kasil #6)
Kasil #6 is a liquid potassium silicate solution with a SiO2:K2O weight ratio of 2.5, used in adhesives, coatings, and welding electrodes. It falls under HTS 2839.90.1000 as a commercial alkali metal silicate of potassium, chemically defined as a soluble glass-like compound. This product is widely imported for industrial applications requiring alkali resistance.
PQ Corporation Kasil #19 Potassium Silicate
Kasil #19 offers a 3.9:1 SiO2:K2O ratio in liquid form, optimized for welding rod binders and high-performance coatings. Falls under HTS 2839.90.1000 for commercial potassium silicates per Chapter 28 notes. Essential for manufacturing durable industrial products.
Industrial Potassium Silicate 40% Solids
A 40% solids aqueous solution of potassium silicate used in paper manufacturing and detergents. Classified in HTS 2839.90.1000 as a commercial alkali metal silicate of potassium, aligning with Chapter 28 definitions. Key import for pulp and paper industry.
Spray-Dried Potassium Silicate Beads
Beaded form of potassium silicate for easy handling in concrete admixtures and catalysts. HTS 2839.90.1000 covers this commercial form as a potassium silicate compound. Popular for construction chemical imports.