Tariff reference › Chapter 99 › 9902.04.21
HTS 9902.04.21 — N-Ethenylformamide (N-vinylformamide) (CAS No. 13162-05-5) (provided for in subheading 2924.19.11)
The current US import duty for N-Ethenylformamide (N-vinylformamide) (CAS No. 13162-05-5) (provided for in subheading 2924.19.11) (HTS 9902.04.21) — the base rate, any Section 301/232/122 surcharge that applies, and what's changed recently.
N-Ethenylformamide (N-vinylformamide) (CAS No. 13162-05-5) (provided for in subheading 2924.19.11)
Current US duty rate
| Column 1 (General / MFN) | 3.3% |
|---|---|
| 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.
Alert me when this code changes (free) See all recorded changes
Programmatic access: the full duty stack (base + surcharges + MPF/HMF for a given origin & value) is at /duty?code=9902.04.21&origin=&value=. Current as of USITC 2026HTSRev10 (synced 2026-06-12).