Eliminate tariff overpayments and surprises. We flag duty you may have overpaid and alert you when a tariff change hits your imports.

Try it free
HTS Code · Chapter 39 · Updated Oct 26, 2026

3911.90.35.001,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4

Also written 3911903500 and 3911.90.3500

HTS Code 3911.90.35.00 covers any article best defined as Plastics and Articles Thereof Rubber and Articles ThereofPlastics and articles thereofPetroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms:Other:Other:Containing monomer units which are aromatic or modified aromatic, or which are obtained, derived or manufactured in whole or in part therefrom:Thermosetting:1,1'-Bis(methylenedi-4,1-phenylene)- 1H-pyrrole-2,5-dione, copolymer with 4,4'-methylenebis(benzeneamine); and Hydrocarbon novolac cyanate ester in the Harmonized Tariff Schedule.

As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from China pay 37.5% in duties: a duty-free base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%).

From China, the total duty on 3911.90.35.00 last changed on Jul 24, 2026, from 35% to 37.5%. It has changed 2 times since Nov 17, 2025.

Estimated Duty on 3911.90.35.00

$10,000.00 by ocean, entered Oct 26, 2026

China
Total duty
37.5%
$3,750.00 on this shipment
Fees
0.47%
MPF + HMF · $47.14
Duty + fees
37.97%
Payable to CBP
Landed cost
$13,797.14
On $10,000.00 customs value
  • Section 301 – China25%
  • Section 301 – Forced Labor12.5%
  • Customs fees0.47%

Chapter 99 lines9903.88.02Section 301 China: List 29903.05.31Section 301 Forced Labor – China

5 exemptions could lower this

Check them against your real shipment details.

Open Tariff CalculatorFree · No sign-up

Get Alerted When New Tariffs Affect 3911.90.35.00

We'll send you an email anytime tariff changes hit this import, 100% free.

Base Duty Rates for 3911.90.35.00

From the Harmonized Tariff Schedule

General Rate of Duty
Free
Special Rate of Duty
—
Column 2 (Non-NTR)
15.4¢/kg + 45%
Units of Quantity
kg
Total duty by countryAll 20 →
  • China37.5%
  • Mexico10%
  • Canada10%
  • Vietnam12.5%
  • Germany10%
Tariffs by country · Oct 26, 2026

US Import Duty on HTS 3911.90.35.00 by Country of Origin

As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from China pay 37.5% in duties: a duty-free base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%). Of the 20 largest sources of US imports, the lowest total is 10%, from Mexico, Canada and 11 more.

Total duty from China
37.5%
Base rate plus 2 additional tariffs
Lowest total duty
10%
From Mexico, Canada and 11 more
Countries with additional tariffs
20 of 20
Section 232, 301 and other Chapter 99 duties
Country of originBase rateAdditional tariffsTotal duty
ChinaFree37.5%
MexicoFree10%0% with USMCA
CanadaFree10%0% with USMCA
VietnamFree12.5%
GermanyFree10%
JapanFree12.5%
South KoreaFree12.5%
TaiwanFree10%
IndiaFree10%
IrelandFree10%
ItalyFree10%
SwitzerlandFree12.5%
ThailandFree12.5%
MalaysiaFree10%
United KingdomFree10%
FranceFree10%
IndonesiaFree10%
BrazilFree37.5%
BangladeshFree10%
CambodiaFree10%
Duty from each country, in words
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from China pay 37.5% in duties: a duty-free base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Mexico pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%). With USMCA, qualifying goods pay 0%.
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Canada pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%). With USMCA, qualifying goods pay 0%.
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Vietnam pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Germany pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Japan pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from South Korea pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Taiwan pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from India pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Ireland pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Italy pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Switzerland pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Thailand pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Malaysia pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from United Kingdom pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from France pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Indonesia pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Brazil pay 37.5% in duties: a duty-free base rate plus Section 301 – Brazil (25%) and Section 301 – Forced Labor (12.5%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Bangladesh pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).
  • As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Cambodia pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%).

Duties on goods entered Oct 26, 2026 at the general rate (Column 2 where it applies), with tariff data verified through 2026 HTS Revision 20. Totals are before customs fees (MPF, HMF) and any antidumping or countervailing duties (AD/CVD); with a free account, the calculator checks the AD/CVD cases that may cover your import. Some tariffs and exemptions depend on details such as metal content or end use, which the calculator asks about. See US tariffs for every country.

Calculate Duty for Your Shipment
Eliminate taiff overpayments & surprises

Know the moment a tariff update hits 3911.90.35.00

Add it, with your country of origin, to the Tariff Tracker, free for 14 days. It flags duty you may have overpaid on your entries, and when a new tariff action affects it, you hear about it first, with exactly what changes.

  • Every entry audited for duty you may have overpaid
  • Every new US tariff action checked against your imports, every hour
  • An alert with the rate before and after, by email, Slack or Teams
  • AD/CVD alerts when an import may fall under a case
Try it freeNo credit card · Plans as low as $0.30 per import, per month · Tariff News alerts free, forever
Example alert

New tariff action affects 1 of your imports

3911.90.35.00from China37.5% → 47.5%

Its rate today, if a new 10% tariff were added

Top origins · US imports 2025

Top Origins: Countries the US Imports HTS 3911.90.35.00 From

In 2025 the US imported $4M of 1,1'-bis- 1h-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00), down 13% on 2024, mostly from Canada (61%), China (18%) and Switzerland (12%). Each country's total duty today is shown beside its imports.

Country of originUS imports, 2025Sharevs 2024Total duty today
Canada$2M61%6%10%0% with USMCA
China$650K18%900%37.5%
Switzerland$424K12%72%12.5%
France$146K4%17%10%
Japan$115K3%6%12.5%
Italy$43K1%New10%
Germany$23K1%2200%10%
Taiwan$6K0%New10%

Source: U.S. Census Bureau, general imports. Duty on a $10,000 ocean shipment entered today, before customs fees. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Related codes

Other HTS Codes at This Level

Legal notes

Relevant HTS Notes

Official USITC notes that may affect classification under HTS 3911.90.35.00.

CBP rulings

Related CROSS Rulings for HTS 3911.90.35.00

CBP classification rulings related to 3911.90.35.00. Open a ruling to read how Customs classified a similar product.

No rulings found

No CROSS classification rulings were found for HTS code "3911.90.35".

Questions

HTS 3911.90.35.00 FAQ

Something else? Ask us.

What does HTS code 3911.90.35.00 cover?

HTS code 3911.90.35.00 covers 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (1,1'-Bis(methylenedi-4,1-phenylene)- 1H-pyrrole-2,5-dione, copolymer with 4,4'-methylenebis(benzeneamine); and Hydrocarbon novolac cyanate ester), classified under Chapter 39 (Plastics and articles thereof) in the US Harmonized Tariff Schedule. The general duty rate is Free.

What is the duty rate for HTS 3911.90.35.00?

The general (Column 1) rate of duty for HTS 3911.90.35.00 is Free. The Column 2 rate, for countries without normal trade relations, is 15.4¢/kg + 45%. Additional Chapter 99 tariffs, such as Section 301 and Section 232, can apply on top depending on the country of origin.

What is the US tariff on 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from China?

As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from China pay 37.5% in duties: a duty-free base rate plus Section 301 – China (25%) and Section 301 – Forced Labor (12.5%).

What is the US tariff on 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Vietnam?

As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Vietnam pay 12.5% in duties: a duty-free base rate plus Section 301 – Forced Labor (12.5%).

What is the US tariff on 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Mexico?

As of Oct 26, 2026, US imports of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 (HTS 3911.90.35.00) from Mexico pay 10% in duties: a duty-free base rate plus Section 301 – Forced Labor (10%). Goods that qualify for USMCA pay 0%.

Where does the US import HTS 3911.90.35.00 from?

In 2025 the US imported $4M of 1,1'-Bis- 1H-pyrrole-2,5-dione, copolymer with 4 under HTS 3911.90.35.00, mostly from Canada (61%), China (18%) and Switzerland (12%), according to U.S. Census Bureau import data.

Which country has the lowest US duty on HTS 3911.90.35.00?

Of the 20 largest sources of US imports, the lowest total duty on HTS 3911.90.35.00 is 10%, from Mexico, Canada and 11 more, as of the tariffs in effect on 2026-10-26.

Sources

Primary Sources

The official documents behind the rates and tariffs on this page. Duties are worked out from them as of Revision 20 (2026); check the legal text before you file.