Mercuric Sulfate Catalyst from Japan
HgSO4 preparation employed as a catalyst in acetylene hydration to acetone production. Classified in HTS 3815.90.2000 as a wholly inorganic mercury reaction initiator.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Strict mercury import quotas apply; obtain Commerce Department authorization prior to shipment
• Use secondary containment packaging per UN standards for soluble mercury salts
• Misclassification risk as battery component (8507) if not clearly catalytic