China supplies 48.3% of U.S. imports of Theophylline, Aminophylline & Their Derivatives and Salts, across 6 countries (year to date through September 2026).
HHI 3,549 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
6 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | China | $201K | 89.9% | +216.6% | 0.0% |
| 2 | India | $23K | 10.1% | -36.7% | 0.0% |
| 3 | Netherlands | -- | 0.0% | -- | -- |
| 4 | Germany | -- | 0.0% | +644.2% | -- |
| 5 | Italy | -- | 0.0% | -43.2% | -- |
| 6 | South Africa | -- | 0.0% | -- | -- |
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.