Mercuric Sulfate Catalyst from Mexico
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 — Mexico → United States
12.8%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, 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