Ammonium Perrhenate Catalyst Precursor Flakes from Canada
Flake-form ammonium perrhenate designed for conversion to Re2O7 in catalyst manufacturing for hydrocracking. Its chemical definition as NH4ReO4 places it squarely under HTS 2841.90.20.00.
Duty Rate — Canada → United States
3.1%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Specify physical form (powder/flakes) in commercial invoice to match statistical suffix
• Ensure packaging prevents moisture absorption which affects decomposition
• Pre-clear with CBP if first import; rhenium compounds receive heightened scrutiny