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

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HS 2845.10

Heavy water (deuterium oxide)

In short

  • The US imported $22.7M of this product over the 12 months to August 2026, down 65% on the year before.
  • Canada is the largest supplier, with 95.1% of US imports; Germany is next, with 3.2%.
  • India is the cheapest main supplier before and after freight and duty, landing at $671.43/kg.
  • Duty paid averaged 0.5% of the value of imports in August 2026, down 14.2 points on a year earlier.
  • Canada is gaining share: 76.3% over the last 12 months, up from 26.6%.
  • US exports were $9.5M over the last 12 months; the largest market is France, with 23.6%.

US imports, Aug 2026

$2.0M

↑ +6253% vs Aug 2025

Last 12 months

$22.7M

↓ −65% vs the 12 months before

Average duty paid

0.5%

↓ −14.2 pts vs Aug 2025

Top supplier

Canada

95.1% 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$32K
September 2025$1.6M
October 2025$66K
November 2025$1.3M
December 2025$1.5M
January 2026$4.6M
February 2026$4.4M
March 2026$2.4M
April 2026$4.2M
May 2026$106K
June 2026$294K
July 2026$271K
August 2026$2.0M

What changed

  • US imports were $2.0M in August 2026, up 646% from July 2026 and up 6253% from August 2025.
  • Over the 12 months to August 2026 they totalled $22.7M, down 65% on the 12 months before.
  • Biggest moves in market share since July 2026: Canada up from 9.8% to 95.1%, Germany down from 63.7% to 3.2%.
  • Average price from Germany rose 31% since July 2026, to $3,270/kg.
  • Duty paid on imports from Israel rose from 10.0% to 12.5% of their value since July 2026.

US trade by year

US imports were $22.7M in the 12 months to Aug 2026, up 48% on the 12 months to Aug 2017. US exports were $9.5M, down 41%. 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.

2017201820192020202120222023202420252026Duty ↑
Show the numbers
PeriodUS imports
12 months to Aug 2017$15.3M
12 months to Aug 2018$20.3M
12 months to Aug 2019$30.0M
12 months to Aug 2020$28.8M
12 months to Aug 2021$22.9M
12 months to Aug 2022$59.6M
12 months to Aug 2023$45.2M
12 months to Aug 2024$92.1M
12 months to Aug 2025$65.7M
12 months to Aug 2026$22.7M
  • Canada
  • India
  • Germany
  • Israel
  • All countries
Share of US imports
Show the numbers
PeriodCanadaIndiaGermanyIsrael
12 months to Aug 201794.0%0.2%0.0%2.9%
12 months to Aug 201897.9%0.0%0.0%0.0%
12 months to Aug 201987.4%0.0%0.0%1.5%
12 months to Aug 202096.2%0.0%0.0%3.5%
12 months to Aug 202189.7%0.0%0.0%10.0%
12 months to Aug 202269.8%11.6%0.0%10.2%
12 months to Aug 202342.4%23.3%0.0%9.8%
12 months to Aug 202440.0%54.9%1.2%2.1%
12 months to Aug 202526.6%62.4%0.1%4.5%
12 months to Aug 202676.3%17.5%3.1%1.3%
Duty paid, % of value
Show the numbers
PeriodCanadaIndiaGermanyIsraelAll countries
12 months to Aug 20170.0%0.0%n/a0.0%0.0%
12 months to Aug 20180.0%n/a0.0%0.0%0.0%
12 months to Aug 20190.0%0.0%n/a0.0%0.0%
12 months to Aug 20200.0%n/an/a0.0%0.0%
12 months to Aug 20210.0%n/an/a0.0%0.0%
12 months to Aug 20220.0%0.0%0.0%0.0%0.0%
12 months to Aug 20230.0%0.0%0.0%0.0%0.0%
12 months to Aug 20240.0%0.0%0.0%0.0%0.0%
12 months to Aug 20250.2%0.3%9.6%0.2%0.7%
12 months to Aug 20260.1%10.0%11.0%12.9%3.8%
PeriodUS importsDuty paidUS exports
12 months to Aug 2026$22.7M−65%3.8%+3.1 pts$9.5M−35%
12 months to Aug 2025$65.7M−29%0.7%+0.7 pts$14.7M+110%
12 months to Aug 2024$92.1M+104%0.0%0.0 pts$7.0M−36%
12 months to Aug 2023$45.2M−24%0.0%0.0 pts$10.9M0.0%
12 months to Aug 2022$59.6M+161%0.0%0.0 pts$10.9M+142%
12 months to Aug 2021$22.9M−21%0.0%0.0 pts$4.5M−63%
12 months to Aug 2020$28.8M−4.0%0.0%0.0 pts$12.1M−18%
12 months to Aug 2019$30.0M+47%0.0%0.0 pts$14.8M+7.8%
12 months to Aug 2018$20.3M+33%0.0%0.0 pts$13.7M−15%
12 months to Aug 2017$15.3M0.0%$16.2M

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
Canada$1.9M95.1%+55.0 pts$1,054/kg+66%0.0%0.0 pts
Germany$65K3.2%new$3,270/kg10.0%
Israel$22K1.1%new$11,138/kg12.5%
Switzerland$12K0.6%−26.9 pts$413.61/kg−5.1%12.5%−26.5 pts
All countries$2.0M100.0%$1,079/kg+66%0.5%−14.2 pts

The 3 largest suppliers had 96.9% 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
India$591.12/kg$21.20/kg3.6% of price$59.11/kg10.0% of price$671.43/kg+10%
Canada$1,028/kg$1.25/kg0.1% of price$2.42/kg0.2% of price$1,032/kg+18%
All countries$652.64/kg$18.66/kg2.9% of price$54.08/kg8.3% of price$725.38/kg+22%

Landed at a US port, India was cheapest, at $671.43/kg: 34.9% below Canada.

Landed cost from Canada rose 18% on a year earlier, to $1,032/kg, mostly on price: $854.34/kg then, $1,028/kg now.

How the market is shifting

Canada gained the most share: 76.3% of US imports over the last 12 months, up from 26.6% in the 12 months before. India lost the most: 17.5%, down from 62.4%. 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.

  • Canada
  • India
  • Germany
  • Israel
  • All countries
Share of US imports
Show the numbers
MonthCanadaIndiaGermanyIsrael
September 202472.5%0.0%0.0%23.7%
October 20241.0%0.0%0.0%49.8%
November 202499.0%0.0%0.0%0.0%
December 20240.7%0.0%0.0%96.5%
January 202592.7%0.0%0.0%6.3%
February 20253.6%66.5%0.0%10.5%
March 20254.1%95.4%0.0%0.4%
April 202529.2%0.0%1.5%42.7%
May 202518.3%0.0%6.9%16.5%
June 20251.2%0.0%0.0%0.0%
July 202549.9%45.2%1.3%1.4%
August 202540.1%0.0%0.0%0.0%
September 202595.6%0.0%2.4%1.2%
October 202526.2%0.0%0.0%28.3%
November 202598.1%0.0%0.0%0.0%
December 202594.8%0.0%0.0%2.5%
January 202695.7%0.0%2.1%1.4%
February 202698.9%0.0%0.0%0.9%
March 202697.1%0.0%1.0%1.0%
April 20261.0%93.6%4.0%0.0%
May 202618.7%0.0%66.7%0.0%
June 202624.5%0.8%22.3%0.0%
July 20269.8%0.0%63.7%24.4%
August 202695.1%0.0%3.2%1.1%
Duty paid, % of value
Show the numbers
MonthCanadaIndiaGermanyIsraelAll countries
September 20240.0%n/an/a0.0%0.0%
October 20240.0%n/an/a0.0%0.0%
November 20240.0%n/an/an/a0.0%
December 20240.0%n/an/a0.0%0.0%
January 20250.0%n/a0.0%0.0%0.0%
February 20250.0%0.0%n/a0.0%0.0%
March 20250.2%0.0%n/a0.0%0.0%
April 20252.6%n/a10.0%0.0%3.5%
May 202514.8%n/a10.0%10.0%10.9%
June 202525.0%n/an/an/a10.2%
July 20250.8%10.0%10.0%10.0%5.4%
August 20250.0%n/an/an/a14.8%
September 20250.0%n/a15.0%15.0%0.7%
October 202535.0%n/an/a15.0%20.2%
November 20250.0%n/an/an/a0.3%
December 20250.1%n/an/a15.0%0.7%
January 20260.0%n/a15.0%15.0%0.6%
February 20260.0%n/an/a12.3%0.1%
March 20260.0%n/a10.0%10.0%0.3%
April 20260.8%n/a10.0%n/a8.6%
May 20260.0%n/a10.0%n/a8.1%
June 20266.6%10.0%10.0%n/a10.0%
July 20260.0%n/a10.0%10.0%9.0%
August 20260.0%n/a10.0%12.5%0.5%

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. April 2026 · Duty paid: all countries 0.5% → 8.8%.
  2. May 2025 · Duty paid: all countries 0.0% → 10.2%.

Where it enters the US

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

  1. Buffalo-Niagara Falls, NY$9.7M · 42.5%
  2. Port Huron, MI$7.4M · 32.5%
  3. Chicago, IL$3.1M · 13.6%
  4. Dallas-Fort Worth, TX$1.0M · 4.4%
  5. New Orleans, LA$361K · 1.6%

Where US exports go

US exports were $1.4M in August 2026, up 95% from August 2025, and $9.5M over the last 12 months, down 35% on the 12 months before. Fastest-growing market with 3% or more of US exports: China, up 948%.

MarketLast 12 monthsSharevs 12 months before
France$2.2M23.6%+5.1%
China$2.1M21.7%+948%
United Kingdom$1.1M11.5%−17%
Germany$926K9.7%−87%
Canada$503K5.3%+205%
Japan$422K4.4%−68%
Suriname$420K4.4%new
Singapore$410K4.3%+186%
Other countries (17)$1.4M14.9%+155%
All countries$9.5M100.0%−35%

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; 66 have reported 2025 so far. Where a country's figure for imports from the US is under half or over double what the US recorded exporting there that year, the US figure is shown under it.

MarketImportsvs year beforeFrom the USUS share
China$36.7Min 2025+2.1%$159K0.4%
Switzerland$15.8Min 2025+42%$29K0.2%
Argentina$10.0Min 2025+569028%$1K0.0%
Germany$7.0Min 2025+2.2%$1.1M16.1%
France$6.8Min 2025+13%$391KUS records $1.0M5.7%
Korea, South$6.2Min 2025−71%$297K4.8%
Japan$6.0Min 2025−6.2%$843K13.9%
Spain$4.0Min 2025+5854%$32K0.8%

The biggest market outside the US is China, which imported $36.7M of this product in 2025, 0.4% of that from the US.

Of these, imports into Switzerland grew fastest: up 42% from 2024 to 2025.

Other products under heading 2845: stable (nonradioactive) isotopes; compounds, inorganic or organic, of such isotopes, whether or not chemically defined. US trade over the 12 months to August 2026.

ProductUS importsUS exports
Stable (nonradioactive) isotopes; compounds, inorganic or organic, of such isotopes, whether or not chemically defined, not elsewhere specifiedHS 2845.90$131.5M$271.7M
Helium-3HS 2845.40$8.7M$2.7M
Boron enriched in boron-10 and its compoundsHS 2845.20$3K$1.7M
Lithium enriched in lithium-6 and its compoundsHS 2845.30$9K$195K
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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