China HS → US HTS
China HS 3909.3100 (聚（亚甲基苯基异氰酸酯）（粗): US HTS candidates & duty rates
China tariff line for "聚（亚甲基苯基异氰酸酯）（粗" shares the international HS6 anchor 390931 with 1 US HTS candidate below. Compare descriptions, then calculate landed duty.
Updated
China HS 3909.3100 most commonly maps to US HTS 3909.31.00.00. Total duty rate from China (MFN + Chapter 99 overlays): about 56.50%. Verify the description before filing.
China tariff line facts
| China HS line | 3909.3100 |
|---|---|
| Description | 聚（亚甲基苯基异氰酸酯）（粗 |
| Category path | 初级形状的氨基树脂、酚醛树脂 > 其他氨基树脂 > 聚（亚甲基苯基异氰酸酯）（粗 |
| Shared HS6 | 390931 |
| China MFN rate (reference) | 6.5 |
| Schedule version | 2026 |
US HTS candidates (1)
| US HTS | Description | General (MFN) | Total from China |
|---|---|---|---|
| 3909.31.00.00 | Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI) | 6.5% | 56.50% |
Total = MFN base + Section 301 / IEEPA / reciprocal overlays active for China origin. AD/CVD not included.
Frequently asked questions
Which US HTS code corresponds to China HS 3909.3100?
There is no one-to-one mapping: only the first six digits (HS6 390931) are shared internationally. Under this anchor the US schedule has 1 candidate line; the most common is 3909.31.00.00. Match your product facts (material, use, construction) against the descriptions to pick the right one.
How much is US import duty for "聚（亚甲基苯基异氰酸酯）（粗" from China?
Using the leading candidate 3909.31.00.00, the total rate from China is about 56.50% — MFN base plus the Chapter 99 overlays (Section 301 / IEEPA / reciprocal) active for China origin. Other candidates may differ, so verify classification first.
Why is China HS8 not identical to US HTS8?
The WCO Harmonized System is only agreed to six digits. China extends HS6 to 8/10-digit national lines for its own tariffs and statistics, and the US does the same with HTS8/HTS10 — the extensions are independent, so codes must be bridged via HS6.
How do I confirm the final HTS classification?
Compare the US line descriptions against your product facts, check CBP rulings for similar goods, and when in doubt request a binding ruling. The bridge tool lets you re-run this query and compare all candidates side by side.