Zirconium Subcarbonate Crystals from Mexico
Crystalline zirconium subcarbonate, a partially carbonated form used in analytical chemistry and as a reagent. It is a chemically defined compound under HTS 2836.99.50.10, fitting the carbonates subheading excluding peroxo forms. These crystals are employed in lab synthesis of metal organics.
Duty Rate — Mexico → United States
3.7%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Include lab-grade purity certification (>99%) and avoid bulk packaging that mimics industrial mixtures; declare as 'chemically defined' to prevent shift to 3824
• Watch for REACH-like US regs on zirconium compounds