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

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HS 2933.52

Malonylurea (barbituric acid) and its salts

In short

  • The US imported $1.3M of this product over the 12 months to August 2026, up 36% on the year before.
  • China is the largest supplier, with 100.0% of US imports.
  • Duty paid averaged 12.5% of the value of imports in August 2026.
  • Germany is gaining share: 74.3% over the last 12 months, up from 63.2%.
  • 3 Federal Register notices named this product's tariff codes in the last 12 months.
  • US exports were $6K over the last 12 months; the largest market is India, with 52.2%.

US imports, Aug 2026

$6K

Last 12 months

$1.3M

↑ +36% vs the 12 months before

Average duty paid

12.5%

Top supplier

China

100.0% 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.

Aug2025SepOctNovDecJan2026FebMarAprMayJunJulAug
Show the numbers
MonthUS imports
August 2025$0
September 2025$441K
October 2025$0
November 2025$527K
December 2025$25K
January 2026$0
February 2026$8K
March 2026$57K
April 2026$50K
May 2026$58K
June 2026$72K
July 2026$34K
August 2026$6K

What changed

  • US imports were $6K in August 2026, down 83% from July 2026.
  • Over the 12 months to August 2026 they totalled $1.3M, up 36% on the 12 months before.
  • Market shares barely moved since July 2026: no supplier with 3% or more of the market gained or lost 2 points.
  • Average price from China rose 14% since July 2026, to $5.65/kg.
  • Duty paid on imports from China rose from 0.0% to 12.5% of their value since July 2026.

US trade by year

US imports were $1.3M in the 12 months to Aug 2026, down 14% on the 12 months to Aug 2017. US exports were $6K, down 89%. In January 2017 the HS 2017 revision moved some goods between this code and 2939.80, so part of a change across the dashed line can be the revision.

2017201820192020202120222023202420252026HS 2017
Show the numbers
PeriodUS imports
12 months to Aug 2017$1.5M
12 months to Aug 2018$1.6M
12 months to Aug 2019$1.8M
12 months to Aug 2020$974K
12 months to Aug 2021$990K
12 months to Aug 2022$1.3M
12 months to Aug 2023$240K
12 months to Aug 2024$787K
12 months to Aug 2025$937K
12 months to Aug 2026$1.3M
  • Germany
  • China
  • India
  • Switzerland
  • All countries
Share of US imports
Show the numbers
PeriodGermanyChinaIndiaSwitzerland
12 months to Aug 20170.5%27.5%42.7%0.0%
12 months to Aug 20180.6%31.4%67.5%0.0%
12 months to Aug 20190.6%30.6%67.6%0.0%
12 months to Aug 20200.8%12.3%86.1%0.0%
12 months to Aug 20210.3%55.9%43.0%0.0%
12 months to Aug 20220.5%78.4%20.8%0.0%
12 months to Aug 20238.1%91.9%0.0%0.0%
12 months to Aug 20242.2%70.1%27.7%0.0%
12 months to Aug 202563.2%13.1%23.5%0.0%
12 months to Aug 202674.3%21.3%4.2%0.3%
Duty paid, % of value
Show the numbers
PeriodGermanyChinaIndiaSwitzerlandAll countries
12 months to Aug 20170.0%0.0%0.0%n/a0.0%
12 months to Aug 20180.0%0.0%0.0%n/a0.0%
12 months to Aug 20190.0%0.0%0.0%n/a0.0%
12 months to Aug 20200.0%0.0%0.0%n/a0.0%
12 months to Aug 20210.0%0.0%0.0%n/a0.0%
12 months to Aug 20220.0%0.0%0.0%n/a0.0%
12 months to Aug 20230.0%0.0%n/an/a0.0%
12 months to Aug 20240.0%0.0%0.0%n/a0.0%
12 months to Aug 20250.0%12.0%0.0%n/a1.6%
12 months to Aug 20260.0%2.9%0.0%0.0%0.6%
PeriodUS importsDuty paidUS exports
12 months to Aug 2026$1.3M+36%0.6%−0.9 pts$6K−84%
12 months to Aug 2025$937K+19%1.6%+1.6 pts$36K−68%
12 months to Aug 2024$787K+228%0.0%0.0 pts$111K−93%
12 months to Aug 2023$240K−81%0.0%0.0 pts$1.7M+1712%
12 months to Aug 2022$1.3M+27%0.0%0.0 pts$93K+77%
12 months to Aug 2021$990K+1.7%0.0%0.0 pts$52K−97%
12 months to Aug 2020$974K−47%0.0%0.0 pts$1.6M+1097%
12 months to Aug 2019$1.8M+15%0.0%0.0 pts$132K−87%
12 months to Aug 2018$1.6M+6.2%0.0%0.0 pts$996K+1781%
12 months to Aug 2017HS 2017 revision$1.5M0.0%$53K

Who supplies the US

August 2026. Small figures under each value are the change from August 2025.

CountryUS importsShareAverage priceDuty paidLast 13 months
China$6K100.0%new$5.65/kg12.5%
All countries$6K100.0%$5.65/kg12.5%

The 3 largest suppliers had 99.7% of US imports over the last 12 months.

How the market is shifting

Germany gained the most share: 74.3% of US imports over the last 12 months, up from 63.2% in the 12 months before. India lost the most: 4.2%, down from 23.5%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months.

  • Germany
  • China
  • India
  • Switzerland
  • All countries
Share of US imports
Show the numbers
MonthGermanyChinaIndiaSwitzerland
September 2024n/an/an/an/a
October 202451.2%48.8%0.0%0.0%
November 20240.0%100.0%0.0%0.0%
December 20240.0%100.0%0.0%0.0%
January 2025100.0%0.0%0.0%0.0%
February 2025100.0%0.0%0.0%0.0%
March 202595.1%4.9%0.0%0.0%
April 202544.9%2.0%53.2%0.0%
May 20250.0%100.0%0.0%0.0%
June 202515.5%78.7%0.0%0.0%
July 20250.0%100.0%0.0%0.0%
August 2025n/an/an/an/a
September 202599.5%0.5%0.0%0.0%
October 2025n/an/an/an/a
November 202596.2%3.8%0.0%0.0%
December 20250.0%100.0%0.0%0.0%
January 2026n/an/an/an/a
February 20260.0%100.0%0.0%0.0%
March 20265.6%0.0%94.4%0.0%
April 20260.0%100.0%0.0%0.0%
May 20260.0%100.0%0.0%0.0%
June 20260.0%95.5%0.0%4.5%
July 20260.0%100.0%0.0%0.0%
August 20260.0%100.0%0.0%0.0%
Duty paid, % of value
Show the numbers
MonthGermanyChinaIndiaSwitzerlandAll countries
September 2024n/an/an/an/an/a
October 20240.0%0.0%n/an/a0.0%
November 2024n/a0.0%n/an/a0.0%
December 2024n/a0.0%n/an/a0.0%
January 20250.0%n/an/an/a0.0%
February 20250.0%n/an/an/a0.0%
March 20250.0%20.0%n/an/a1.0%
April 20250.0%20.0%0.0%n/a0.4%
May 2025n/a20.0%n/an/a20.0%
June 20250.0%20.0%n/an/a15.7%
July 2025n/a20.0%n/an/a20.0%
August 2025n/an/an/an/an/a
September 20250.0%20.0%n/an/a0.1%
October 2025n/an/an/an/an/a
November 20250.0%17.6%n/an/a0.7%
December 2025n/a10.0%n/an/a10.0%
January 2026n/an/an/an/an/a
February 2026n/a10.0%n/an/a10.0%
March 20260.0%n/a0.0%n/a0.0%
April 2026n/a0.0%n/an/a0.0%
May 2026n/a0.0%n/an/a0.0%
June 2026n/a0.0%n/a0.0%0.0%
July 2026n/a0.0%n/an/a0.0%
August 2026n/a12.5%n/an/a12.5%

Tariff actions touching this product

Federal Register notices from the last 12 months that list this product's tariff codes. A notice can add a duty, exclude products from one or only mention them, so read each for what it changes. Search the Federal Register for 2933.52

Where it enters the US

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

  1. Atlanta, GA$942K · 73.7%
  2. Charleston, SC$66K · 5.1%
  3. Jfk International Airport, NY$54K · 4.2%
  4. Newark, NJ$52K · 4.1%
  5. Mobile, AL$50K · 3.9%

Where US exports go

US exports were $0 in August 2026, and $6K over the last 12 months, down 84% on the 12 months before.

MarketLast 12 monthsSharevs 12 months before
India$3K52.2%−72%
Korea, South$3K47.8%−67%
All countries$6K100.0%−84%

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; 60 have reported 2025 so far.

MarketImportsvs year beforeFrom the USUS share
India$5.6Min 2025+21%$00.0%
Germany$4.3Min 2025−7.2%$00.0%
Australia$735Kin 2025+18%$00.0%
Japan$594Kin 2025−32%$00.0%
Hungary$429Kin 2025+332%$00.0%
Switzerland$262Kin 2025−14%$00.0%
France$127Kin 2025+130%$00.0%
Indonesia$49Kin 2025+174%$7961.6%

The biggest market outside the US is India, which imported $5.6M of this product in 2025, none of it from the US.

Of these, imports into India grew fastest: up 21% from 2024 to 2025.

Other products under heading 2933: heterocyclic compounds with nitrogen hetero-atom(s) only. US trade over the 12 months to August 2026.

ProductUS importsUS exports
Heterocyclic compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structue, not elsewhere specifiedHS 2933.39$1.22B$757.5M
Heterocyclic compounds with nitrogen hetero-atom(s) only, not elsewhere specifiedHS 2933.99$1.50B$388.7M
Heterocyclic compounds containing a pyrimidine ring (hydrogenated or not) or a piperazine ring in the structure, not elsewhere specifiedHS 2933.59$1.02B$336.1M
Lactams (excluding 6-hexanelactam), not elsewhere specifiedHS 2933.79$560.7M$127.6M
Heterocyclic compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, not elsewhere specifiedHS 2933.19$534.8M$41.6M
Heterocyclic compounds (excluding melamine) containing an unfused triazine ring (whether or not hydrogenated) in the structure, not elsewhere specifiedHS 2933.69$370.0M$139.8M
Heterocyclic compounds containing an unfused imidazole ring (wether or not hydrogenated) in the structure, not elsewhere specifiedHS 2933.29$115.1M$133.3M
Heterocyclic compounds containing a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused, not elsewhere specifiedHS 2933.49$94.7M$15.7M
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.
  • 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.
  • Tariff notices are from the Federal Register, matched to this product by the HTS numbers in their text.
  • 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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