3815.90.20.00/Mercuric Sulfate Catalyst/Japan

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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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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