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
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 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