Taiwan supplies 36.6% of U.S. imports of Tetrahydrofuran (THF), across 12 countries (year to date through August 2026).
HHI 2,063 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
12 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Austria | $37K | 35.7% | +557.8% | 10.0% |
| 2 | Taiwan | $37K | 35.7% | -41.4% | 10.0% |
| 3 | United Kingdom | $17K | 16.8% | -- | 13.7% |
| 4 | Germany | $5K | 4.9% | -92.7% | 10.0% |
| 5 | Japan | $4K | 4.3% | -25.6% | 12.5% |
| 6 | Netherlands | $3K | 2.6% | -- | 10.0% |
| 7 | Spain | -- | 0.0% | -- | -- |
| 8 | Belgium | -- | 0.0% | +8.4% | -- |
| 9 | Canada | -- | 0.0% | -- | -- |
| 10 | India | -- | 0.0% | -79.0% | -- |
| 11 | China | -- | 0.0% | -54.1% | -- |
| 12 | South Korea | -- | 0.0% | -91.9% | -- |
Duty is the duty Census calculated on this month's imports for consumption from each country, as a share of their customs value. It applies the rates in force, additional duties such as Section 301, 232 and IEEPA included and claimed trade-agreement preferences netted out, so it is an observed rate rather than a statutory one. It is an estimate, not duty collected: antidumping and countervailing duties, fees and later refunds are not in it. YoY compares year-to-date value with the same months last year.