Mercuric Sulfate Catalyst from Canada
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 — Canada → United States
12.8%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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