Lithium Fluoride Crystals from Mexico
Lithium fluoride (LiF) crystals are used in optics, nuclear reactors, and as a flux in ceramics due to their high transparency to UV light. Classified under HTS 2826.19.90.00 as other fluorides of inorganic bases.
Duty Rate — Mexico → United States
13.9%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide certificates of analysis confirming single chemical compound status per Chapter 28 notes
• Comply with radiation safety regs if for nuclear use; declare optical grade separately
• Watch for reclassification if doped for electronics, moving to 3818