Official data Source: US Census Bureau international trade data
Track this productMethylphosphonic dichloride
In short
- The US imported $289K of this product over the 12 months to August 2026, up 109% on the year before.
- China is the largest supplier, with 100.0% of US imports.
- Duty paid averaged 16.2% of the value of imports in August 2026.
- 2 Federal Register notices named this product's tariff codes in the last 12 months.
- US exports were $125K over the last 12 months; the largest market is Mexico, with 100.0%.
US imports, Aug 2026
$83K
Last 12 months
$289K
↑ +109% vs the 12 months before
Average duty paid
16.2%
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.
Show the numbers
| Month | US imports |
|---|---|
| August 2025 | $0 |
| September 2025 | $0 |
| October 2025 | $0 |
| November 2025 | $0 |
| December 2025 | $67K |
| January 2026 | $0 |
| February 2026 | $0 |
| March 2026 | $0 |
| April 2026 | $70K |
| May 2026 | $70K |
| June 2026 | $0 |
| July 2026 | $0 |
| August 2026 | $83K |
What changed
- US imports were $83K in August 2026.
- Over the 12 months to August 2026 they totalled $289K, up 109% on the 12 months before.
- Biggest moves in market share since July 2026: China up from 0.0% to 100.0%.
US trade by year
US imports were $289K in the 12 months to Aug 2026. US exports were $125K. This code began with the HS 2022 revision in January 2022, taking goods from 2931.39, so its history starts there.
Show the numbers
| Period | US imports |
|---|---|
| 12 months to Aug 2023 | $0 |
| 12 months to Aug 2024 | $0 |
| 12 months to Aug 2025 | $138K |
| 12 months to Aug 2026 | $289K |
- China
- All countries
Show the numbers
| Period | China |
|---|---|
| 12 months to Aug 2023 | n/a |
| 12 months to Aug 2024 | n/a |
| 12 months to Aug 2025 | 100.0% |
| 12 months to Aug 2026 | 100.0% |
Show the numbers
| Period | China | All countries |
|---|---|---|
| 12 months to Aug 2023 | n/a | n/a |
| 12 months to Aug 2024 | n/a | n/a |
| 12 months to Aug 2025 | 13.5% | 13.5% |
| 12 months to Aug 2026 | 16.7% | 16.7% |
| Period | US imports | Duty paid | US exports |
|---|---|---|---|
| 12 months to Aug 2026 | $289K+109% | 16.7%+3.2 pts | $125K |
| 12 months to Aug 2025 | $138K | 13.5% | $0−100% |
| 12 months to Aug 2024 | $0 | n/a | $7K |
| 12 months to Aug 2023 | $0 | n/a | $0 |
Who supplies the US
August 2026. Small figures under each value are the change from August 2025.
| Country | US imports | Share | Average price | Duty paid | Last 13 months |
|---|---|---|---|---|---|
| China | $83K | 100.0%new | $5.51/kg | 16.2% | |
| All countries | $83K | 100.0% | $5.51/kg | 16.2% |
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 2931.51
- Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation
- Implementing Certain Tariff-Related Elements of the Framework for a United States-Switzerland-Liechtenstein Agreement on Fair, Balanced, and Reciprocal Trade
Where it enters the US
Main ports of entry over the 12 months to August 2026: US imports and share.
Where US exports go
US exports were $125K in August 2026, and $125K over the last 12 months.
| Market | Last 12 months | Share | vs 12 months before |
|---|---|---|---|
| Mexico | $125K | 100.0% | new |
| All countries | $125K | 100.0% | new |
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; 6 have reported 2025 so far.
| Market | Imports | vs year before | From the US | US share |
|---|---|---|---|---|
| Oman | $10Kin 2025 | n/a | $10K | 100.0% |
| Poland | $7Kin 2025 | n/a | $0 | 0.0% |
| United Kingdom | $6Kin 2025 | n/a | $0 | 0.0% |
| Spain | $6Kin 2024 | n/a | $0 | 0.0% |
| Belgium | $3Kin 2025 | +5921% | $0 | 0.0% |
| Switzerland | $2Kin 2024 | n/a | $0 | 0.0% |
| Korea, South | $2Kin 2024 | n/a | $0 | 0.0% |
| Ireland | $1Kin 2025 | n/a | $0 | 0.0% |
The biggest market outside the US is Oman, which imported $10K of this product in 2025, 100.0% of that from the US.
The US supplies 100.0% of imports into Oman, but under 10% into Poland, the United Kingdom and Spain.
Related products
Other products under heading 2931: organo-inorganic compounds, not elsewhere specified. US trade over the 12 months to August 2026.
| Product | US imports | US exports |
|---|---|---|
| Non-halogenated organo-phosphorous derivatives, not elsewhere specifiedHS 2931.49 | $621.7M | $793.7M |
| Organo-inorganic compounds, not elsewhere specifiedHS 2931.90 | $480.0M | $536.0M |
| Halogenated organo-phosphorous derivatives, not elsewhere specifiedHS 2931.59 | $3.1M | $6.9M |
| Tetramethyl lead and tetraethyl leadHS 2931.10 | $3.0M | $1.2M |
| Tributyltin compoundsHS 2931.20 | $163K | $1.0M |
| Dimethyl methylphosphonateHS 2931.41 | $944K | $156K |
| Methylphosphonic acidHS 2931.44 | $3K | $707K |
| 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxideHS 2931.46 | $574K | $18K |
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.