Fluorene-2,7-dicarboxylic Acid from Mexico
Fluorene-based dicarboxylic acid for high refractive index polymers in optics. Fused ring system provides rigidity. HTS 2917.39.70.00 aromatic polycarboxylic acid classification.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Tricyclic aromatic confirmed via NMR aromatic proton integration
• Optical grade requires <1ppb fluorescent impurities
• Single compound vs statistical copolymers distinguished by GPC