Tungsten Silicide Powder from Mexico
Tungsten silicide (WSi2) is a refractory intermetallic compound used in microelectronics for gate electrodes and low-resistivity VLSI components. It falls under HTS 2850.00.10.00 as a chemically defined silicide of tungsten, distinct from carbides in heading 2849. The product is typically supplied as a fine gray powder for high-temperature applications.
Duty Rate — Mexico → United States
15.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Verify chemical purity via certificate of analysis to confirm classification as chemically defined under Chapter 28 notes
• Ensure MSDS documentation highlights non-carbide nature to avoid reclassification under heading 2849
• Check for REACH compliance if transshipping through EU; tungsten compounds may trigger additional scrutiny