Cupel for Fire Assay from Canada
Magnesia ceramic cupel absorbing lead in precious metal fire assay analysis. Specifically named in HTS 6903.90.00 refractory goods for metallurgical testing. Bone ash-magnesia fired composition.
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
• Assay lab certification; small size doesn't change refractory status
• Common issue: classified as Chapter 38 chemicals