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Official data Source: US Census Bureau international trade data Data through August 2026 · updated monthly

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HS 2921.51

O-, m-, p-phenylenediamine, diaminotoluenes, and their derivatives; salts thereof

In short

  • The US imported $108.4M of this product over the 12 months to August 2026, down 14% on the year before.
  • Belgium is the largest supplier, with 47.3% of US imports; India is next, with 16.6%.
  • Thailand is the cheapest main supplier before and after freight and duty, landing at $2.58/kg.
  • Duty paid averaged 13.5% of the value of imports in August 2026, down 6.9 points on a year earlier.
  • Belgium is gaining share: 33.2% over the last 12 months, up from 22.6%.
  • US exports were $31.9M over the last 12 months; the largest market is Mexico, with 19.4%.

US imports, Aug 2026

$10.9M

↑ +7.0% vs Aug 2025

Last 12 months

$108.4M

↓ −14% vs the 12 months before

Average duty paid

13.5%

↓ −6.9 pts vs Aug 2025

Top supplier

Belgium

47.3% of US imports

US imports by month

The last 13 months, so the same month a year ago is on the left. August 2026 is highlighted. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

Aug2025SepOctNovDecJan2026FebMarAprMayJunJulAugDuty ↓
Show the numbers
MonthUS imports
August 2025$10.2M
September 2025$7.8M
October 2025$6.2M
November 2025$6.0M
December 2025$8.3M
January 2026$11.0M
February 2026$12.7M
March 2026$12.3M
April 2026$9.6M
May 2026$10.1M
June 2026$5.9M
July 2026$7.5M
August 2026$10.9M

What changed

  • US imports were $10.9M in August 2026, up 45% from July 2026 and up 7.0% from August 2025.
  • Over the 12 months to August 2026 they totalled $108.4M, down 14% on the 12 months before.
  • Biggest moves in market share since July 2026: India up from 6.0% to 16.6%, Korea, South down from 15.9% to 7.6%.
  • Average prices from the top 3 suppliers stayed within 5% of July 2026.
  • Duty paid on imports from Germany fell from 16.5% to 10.0% of their value since July 2026.
  • Duty paid on imports from Belgium fell from 14.3% to 9.7% of their value since July 2026.

US trade by year

US imports were $108.4M in the 12 months to Aug 2026, down 7.4% on the 12 months to Aug 2017. US exports were $31.9M, down 25%. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

2017201820192020202120222023202420252026China ↑Duty ↑Duty ↑
Show the numbers
PeriodUS imports
12 months to Aug 2017$117.0M
12 months to Aug 2018$135.3M
12 months to Aug 2019$139.8M
12 months to Aug 2020$114.4M
12 months to Aug 2021$116.0M
12 months to Aug 2022$184.8M
12 months to Aug 2023$154.5M
12 months to Aug 2024$123.5M
12 months to Aug 2025$125.7M
12 months to Aug 2026$108.4M
  • Belgium
  • India
  • China
  • Korea, South
  • All countries
Share of US imports
Show the numbers
PeriodBelgiumIndiaChinaKorea, South
12 months to Aug 201717.0%6.0%55.8%18.7%
12 months to Aug 201819.5%3.6%55.6%15.6%
12 months to Aug 201924.0%6.1%53.8%13.8%
12 months to Aug 202025.3%10.4%50.3%11.3%
12 months to Aug 202125.9%7.9%42.2%17.2%
12 months to Aug 202216.8%10.0%43.3%20.6%
12 months to Aug 202320.0%6.7%42.7%18.4%
12 months to Aug 202421.7%12.6%28.7%18.7%
12 months to Aug 202522.6%21.0%19.4%16.0%
12 months to Aug 202633.2%21.0%18.4%13.4%
Duty paid, % of value
Show the numbers
PeriodBelgiumIndiaChinaKorea, SouthAll countries
12 months to Aug 20176.5%6.5%6.5%0.0%5.3%
12 months to Aug 20186.5%6.5%6.5%0.0%5.5%
12 months to Aug 20194.8%3.2%15.3%0.0%9.7%
12 months to Aug 20204.6%3.0%26.0%0.0%14.7%
12 months to Aug 20216.0%6.4%30.5%0.0%15.4%
12 months to Aug 20226.5%6.5%31.3%0.0%15.9%
12 months to Aug 20236.5%6.5%31.5%0.0%16.0%
12 months to Aug 20246.5%6.5%30.9%0.0%12.3%
12 months to Aug 20259.0%10.9%38.6%2.9%14.3%
12 months to Aug 202614.5%36.0%48.2%11.9%24.8%
PeriodUS importsDuty paidUS exports
12 months to Aug 2026$108.4M−14%24.8%+10.5 pts$31.9M+16%
12 months to Aug 2025$125.7M+1.7%14.3%+2.1 pts$27.6M−7.4%
12 months to Aug 2024$123.5M−20%12.3%−3.7 pts$29.8M−33%
12 months to Aug 2023$154.5M−16%16.0%+0.1 pts$44.3M+15%
12 months to Aug 2022$184.8M+59%15.9%+0.5 pts$38.5M+9.5%
12 months to Aug 2021$116.0M+1.5%15.4%+0.7 pts$35.1M+18%
12 months to Aug 2020$114.4M−18%14.7%+5.0 pts$29.9M−36%
12 months to Aug 2019$139.8M+3.3%9.7%+4.3 pts$46.8M−1.3%
12 months to Aug 2018$135.3M+16%5.5%+0.2 pts$47.4M+12%
12 months to Aug 2017$117.0M5.3%$42.3M

Who supplies the US

August 2026. Small figures under each value are the change from August 2025. Landed cost by origin, below, adds freight and duty to the price.

CountryUS importsShareAverage priceDuty paidLast 13 months
Belgium$5.2M47.3%+16.1 pts$3.32/kg+32%9.7%−6.4 pts
India$1.8M16.6%−15.8 pts$5.10/kg+12%14.1%−2.3 pts
China$1.1M10.4%+0.1 pts$4.00/kg−32%43.9%−15.7 pts
Germany$830K7.6%−2.0 pts$3.43/kg+18%10.0%−6.1 pts
Korea, South$825K7.6%−6.4 pts$2.41/kg−16%11.8%+1.5 pts
Poland$589K5.4%new$7.19/kg10.0%
Thailand$507K4.6%+2.6 pts$2.07/kg−16%18.6%−0.2 pts
Canada$50K0.5%+0.1 pts$2,006/kg−15%0.0%0.0 pts
All countries$10.9M100.0%$3.50/kg+5.1%13.5%−6.9 pts

The 3 largest suppliers had 72.6% of US imports over the last 12 months.

Landed cost by origin

What importers paid to land this product at a US port from each main supplier, June–August 2026: the price, freight and insurance to the first US port, and duty, per unit. Suppliers with 3% or more of these imports, cheapest landed first. Small figures under landed cost are the change from the same months a year earlier.

  • Price
  • Freight and insurance
  • Duty
CountryPriceFreight and insuranceDutyLanded costMake-up
Thailand$2.06/kg$0.16/kg7.9% of price$0.36/kg17.3% of price$2.58/kg−8.2%
Korea, South$2.31/kg$0.25/kg10.6% of price$0.23/kg9.8% of price$2.79/kg−24%
Belgium$3.26/kg$0.19/kg5.8% of price$0.38/kg11.6% of price$3.83/kg+24%
Germany$3.30/kg$0.13/kg4.0% of price$0.47/kg14.4% of price$3.90/kg+11%
India$4.80/kg$0.15/kg3.2% of price$0.73/kg15.1% of price$5.68/kg+4.0%
China$3.91/kg$0.38/kg9.7% of price$1.64/kg42.0% of price$5.94/kg−37%
Poland$7.19/kg$0.14/kg2.0% of price$0.92/kg12.8% of price$8.25/kg−98%
All countries$3.28/kg$0.21/kg6.4% of price$0.52/kg16.0% of price$4.01/kg−5.8%

Landed at a US port, Thailand was cheapest, at $2.58/kg: 7.5% below Korea, South.

Landed cost from Poland fell 98% on a year earlier, to $8.25/kg, mostly on price: $452.00/kg then, $7.19/kg now.

How the market is shifting

Belgium gained the most share: 33.2% of US imports over the last 12 months, up from 22.6% in the 12 months before. Germany lost the most: 7.7%, down from 16.6%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

  • Belgium
  • India
  • China
  • Korea, South
  • All countries
Share of US imports
Show the numbers
MonthBelgiumIndiaChinaKorea, South
September 202417.6%2.0%35.2%15.2%
October 202418.1%17.7%22.2%14.3%
November 202433.3%19.8%24.0%13.3%
December 202434.3%13.5%32.1%13.3%
January 202528.9%21.2%28.2%15.2%
February 202533.3%12.3%27.0%11.8%
March 202523.4%12.4%14.0%28.1%
April 202512.5%15.7%22.5%12.6%
May 20258.1%31.2%3.9%24.6%
June 20259.6%33.4%6.1%18.9%
July 202521.0%43.1%12.7%6.6%
August 202531.1%32.4%10.3%14.0%
September 202525.0%44.0%12.1%11.8%
October 202522.8%34.0%22.4%15.8%
November 202546.9%23.0%18.0%3.4%
December 202530.1%16.0%20.2%26.1%
January 202631.0%24.0%29.0%10.5%
February 202648.5%21.4%16.7%3.2%
March 202641.3%10.8%18.5%16.9%
April 202620.4%21.4%18.5%16.2%
May 202621.4%23.2%23.9%12.3%
June 20267.2%19.5%16.5%30.6%
July 202638.8%6.0%13.3%15.9%
August 202647.3%16.6%10.4%7.6%
Duty paid, % of value
Show the numbers
MonthBelgiumIndiaChinaKorea, SouthAll countries
September 20246.5%6.5%31.5%0.0%14.3%
October 20246.5%6.5%31.5%0.0%11.1%
November 20246.5%6.5%31.5%0.0%11.6%
December 20246.5%6.5%31.4%0.0%13.6%
January 20256.5%6.5%31.5%0.0%12.2%
February 20256.5%6.5%32.3%0.0%12.9%
March 20256.5%6.5%46.3%0.0%10.3%
April 20258.0%6.5%52.1%0.0%16.3%
May 202516.5%9.2%62.0%6.9%13.7%
June 202516.5%16.5%61.5%10.0%16.8%
July 202516.5%16.5%61.5%10.0%21.5%
August 202516.2%16.5%59.6%10.3%20.4%
September 202515.0%40.4%61.5%14.7%31.2%
October 202515.0%56.4%61.5%15.0%39.4%
November 202515.0%56.5%54.2%15.0%32.0%
December 202515.0%56.5%51.5%15.0%29.3%
January 202615.0%56.5%51.5%15.0%35.5%
February 202614.6%41.5%51.6%15.0%26.6%
March 202616.3%15.7%41.4%9.9%19.6%
April 202616.5%16.5%41.5%10.0%20.1%
May 202616.5%16.4%41.4%10.0%21.1%
June 202616.5%16.4%41.5%10.0%18.8%
July 202614.3%16.3%41.0%8.2%17.3%
August 20269.7%14.1%43.9%11.8%13.5%

Tariff actions touching this product

When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.

  1. February–March 2026 · Duty paid: India 56.5% → 16.4%, China 52.9% → 41.4%, all countries 33.2% → 20.8%.
  2. April–September 2025 · Duty paid: Belgium 6.5% → 16.5%, India 6.5% → 56.5%, China 31.9% → 61.5%, Korea, South 0.0% → 10.1%, Germany 6.5% → 16.4%, all countries 16.7% → 31.6%.
  3. November 2020 · Duty paid: all countries 9.5% → 15.4%.
  4. May–July 2019 · Duty paid: China 11.6% → 26.0%, all countries 7.3% → 13.5%.
  5. September 2018 · Duty paid: China 6.5% → 12.9%.

Where it enters the US

Main ports of entry over the 12 months to August 2026: US imports and share.

  1. Houston, TX$29.4M · 27.1%
  2. Charleston, SC$21.0M · 19.4%
  3. Newark, NJ$19.3M · 17.8%
  4. Wilmington, NC$8.9M · 8.2%
  5. Norfolk-Newport News, VA$6.7M · 6.2%

Where US exports go

US exports were $3.5M in August 2026, up 65% from August 2025, and $31.9M over the last 12 months, up 16% on the 12 months before. Fastest-growing market with 3% or more of US exports: China, up 801%.

MarketLast 12 monthsSharevs 12 months before
Mexico$6.2M19.4%+4.1%
Canada$5.5M17.1%−26%
India$5.0M15.7%+172%
Belgium$2.9M9.0%−14%
Netherlands$2.7M8.4%+61%
Vietnam$1.9M5.9%+39%
Thailand$1.7M5.4%−16%
China$1.5M4.5%+801%
Other countries (25)$4.7M14.6%+23%
All countries$31.9M100.0%+16%

Markets abroad

Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 94 have reported 2025 so far.

MarketImportsvs year beforeFrom the USUS share
Pakistan$69.2Min 2025+99%$234K0.3%
Germany$60.5Min 2025+1.4%$1.4M2.2%
Japan$60.2Min 2025−14%$7K0.0%
Korea, South$55.6Min 2025−37%$498K0.9%
India$46.8Min 2025−14%$2.2M4.6%
Brazil$38.3Min 2025+8.8%$1.3M3.4%
Thailand$35.8Min 2025−6.8%$1.1M3.0%
Spain$34.3Min 2025+4.3%$459K1.3%

The biggest market outside the US is Pakistan, which imported $69.2M of this product in 2025, 0.3% of that from the US.

Of these, imports into Pakistan grew fastest: up 99% from 2024 to 2025.

Other products under heading 2921: amine-function compounds. US trade over the 12 months to August 2026.

ProductUS importsUS exports
Hexamethylenediamine (1,6-diaminohexane) and its saltsHS 2921.22$1.3M$483.4M
Acyclic monoamines, their derivatives, and salts thereof, not elsewhere specifiedHS 2921.19$182.6M$99.2M
Acyclic polyamines, their derivatives, and salts thereof, not elsewhere specifiedHS 2921.29$136.8M$132.2M
Aniline derivatives and their saltsHS 2921.42$140.2M$5.7M
Aromatic monoamines and their derivatives not elsewhere specified; salts thereofHS 2921.49$77.1M$43.1M
Aromatic polyamines and their derivatives not elsewhere specified; salts thereofHS 2921.59$81.8M$16.9M
Ethylenediamine and its saltsHS 2921.21$25.2M$42.0M
Cyclanic, cyclenic or cycloterpenic mono- or polyamines, and their derivatives; salts thereofHS 2921.30$53.5M$9.8M
About these figures
  • Source: US Census Bureau international trade data, not seasonally adjusted, in US dollars. Retrieved November 3, 2026.
  • US imports are general imports at customs value, which excludes freight and insurance. Exports are at free-alongside-ship value.
  • Average price is customs value divided by quantity (kilograms), across all of the product's 10-digit lines.
  • Duty paid is the duty Census calculates on each country's imports for consumption, as a share of their value. It moves with tariff changes, exemptions and the mix of goods within the product.
  • Landed cost adds Census's import charges (freight, insurance and other costs of bringing the goods to the first US port) and calculated duty to the customs value, per unit, across the product's 10-digit lines. It leaves out antidumping and countervailing duties, customs fees and transport inland. Prices are averages across the goods within the code, so a lower one can mean cheaper goods, not the same goods for less.
  • Markets abroad are each country's imports as it reports them to UN Comtrade, in US dollars, usually including freight and insurance. Countries report a year or more late and in their own edition of the HS codes, so one still on an older edition is missing for codes that changed in 2022.
  • Census revises recent months, so figures can change slightly. These are estimates for research and planning, not customs or legal advice.

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