Nepheline Syenite Powder from Japan
Finely ground nepheline syenite used primarily as a fluxing agent in ceramic and glass manufacturing to lower melting temperatures. This natural aluminosilicate mineral falls under HTS 2529.30.00 as unprocessed nepheline syenite in powdered form, distinct from synthetic materials. It provides silica, alumina, and alkalis essential for glaze and body formulations.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify mineral purity through lab analysis to confirm classification under 2529.30.00 and avoid reclassification as earth colors in 2530
• Include geological origin certification and particle size specs in documentation for customs valuation
• Ensure bulk packaging complies with dust control regs; watch for misdeclaration as feldspar (2529.21/22)