Silicon Phosphide from Canada
Silicon phosphide acts as a precursor for chemical vapor deposition in microelectronics and doping agent for n-type semiconductors. Classified as a nonmetal phosphide under HTS 2853.90.50.00 per subheading 'of other metals or nonmetals'. Meets Chapter 28 chemical definition requirements.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide CVD process compatibility certificates; ensure <1000ppm oxygen contamination
• Classify as UN3464 for air shipment (toxic, flammable solid)