Tariff reference › Chapter 99 › 9902.02.56
HTS 9902.02.56 — 3-Methyl-4-(2,6,6-trimethylcyclohex-2-enyl)but-3-en-2-one (Methylionone)(CAS No. 1335-46-2) (provided for in subheading 2914.23.00)
The current US import duty for 3-Methyl-4-(2,6,6-trimethylcyclohex-2-enyl)but-3-en-2-one (Methylionone)(CAS No. 1335-46-2) (provided for in subheading 2914.23.00) (HTS 9902.02.56) — the base rate, any Section 301/232/122 surcharge that applies, and what's changed recently.
3-Methyl-4-(2,6,6-trimethylcyclohex-2-enyl)but-3-en-2-one (Methylionone)(CAS No. 1335-46-2) (provided for in subheading 2914.23.00)
Current US duty rate
| Column 1 (General / MFN) | Free |
|---|---|
| Special (FTA programs) | No change |
| Column 2 (other) | No change |
No Chapter 99 (Section 301/232/122) cross-reference on this line; origin-specific surcharges may still apply — check the calculator.
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Programmatic access: the full duty stack (base + surcharges + MPF/HMF for a given origin & value) is at /duty?code=9902.02.56&origin=&value=. Current as of USITC 2026HTSRev10 (synced 2026-06-12).