Thorium Nitrate Crystals from Mexico
Crystalline Th(NO3)4·4H2O used in gas mantles and catalyst production. Classified in HTS 2844.30.20 for thorium compounds, meeting Chapter 28 definitions for radioactive isotopes.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Include thorium content analysis (>99% purity) in commercial invoice
• NRC Form 741 required for thorium shipments over 100g