Nepheline Syenite for Fiberglass from Germany
Low-boron nepheline syenite for E-glass fiberglass reinforcement production. Provides stable alumina-silica ratio for fiber durability. HTS 2529.30.0050 'other' nepheline selected for boron <50ppm specification.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• ICP-MS analysis confirming B2O3 <50ppm prevents borosilicate confusion
• Fusion temp 1450-1480°C verified by thermal analysis
• Silica/alumina ratio 4.5-5.0 maintained within natural nepheline range