Thorium Dioxide Powder from Canada
High-purity thorium dioxide (ThO2), also known as thoria, used in gas mantles and high-temperature ceramics. Classified under HTS 2844.30.10.00 as a thorium oxide compound per Chapter 28 provisions for chemically defined inorganic compounds.
Duty Rate — Canada → United States
15.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Classify activity level (typically low for ThO2); use UN 2972 for transport if above exempt limits
• Provide certificates of analysis confirming thorium content and purity to meet 'chemically defined' criteria
• Avoid misclassification as ceramic powder (6903); specify chemical compound status in entry docs