2932.99.90/Trioxane Pharmaceutical Intermediate/Japan

Trioxane Pharmaceutical Intermediate from Japan

Trioxane is a heterocyclic compound with oxygen hetero-atoms forming a six-membered ring, used as an intermediate in pharmaceutical synthesis. It falls under HTS 2932.99.90 as a heterocyclic compound with oxygen hetero-atoms only, not elsewhere specified in heading 2932. This classification applies to pure chemical forms without additional functional groups that would shift it to other subheadings.

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

• Verify chemical purity and structure via Certificate of Analysis to confirm it meets Chapter 29 note (a) for separate chemically defined compounds

• Include Safety Data Sheets (SDS) showing no added solvents or stabilizers that could trigger reclassification under notes (e) or (f)

• Avoid common pitfall of classifying as polymers; trioxane is excluded from 2932 per chapter notes if considered cyclic polymer of aldehydes