Potassium Waterglass Powder (Technical Grade) from China
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.
Duty Rate — China → United States
40.6%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• 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