U.S. imports of Theophylline, Aminophylline & Their Derivatives and Salts (HS 293959) totaled $43K in August 2026, imported from 6 countries.
Theophylline, Aminophylline & Their Derivatives and Salts imports of $43K in August 2026 ran 81% below the year-to-date monthly average of $232K.
Last updated: August 2026 dataTheophylline and aminophylline are xanthine-class bronchodilator APIs used in respiratory therapeutics, and their derivatives and salts enter under a single tariff line (2939590000). India and China are the leading suppliers, with Italy, Germany, and the Netherlands also contributing to US import flows. FDA entry review applies because these substances are active pharmaceutical ingredients subject to cGMP requirements; importers must ensure the foreign manufacturer holds an FDA Drug Establishment Registration and that each lot is accompanied by appropriate certificates of analysis. Supply-chain concentration among a handful of Asian API producers makes quality-system audits a critical risk-management tool.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
3 import shipments a month
Foreign establishments that manufacture, process, pack, or hold drug substances for US import must register with FDA under the Drug Establishment Registration program and list their drug products. Shipments from unregistered facilities are subject to refusal of admission.
Aminophylline is a theophylline-ethylenediamine complex, while other derivatives may be distinct salts or chemical modifications. All fall under 2939590000 as long as they are derivatives or salts of theophylline or aminophylline not more specifically provided for elsewhere; importers with novel derivatives should seek a binding ruling to confirm classification.
Subheading 10 of 18 in heading 2939
Subheading 293959 · $43K of $47.4M
ImportsExports
Imports
$43KYoY · free account
Exports
$35KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $2.9M of Theophylline, Aminophylline & Their Derivatives and Salts.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 293959 — Theophylline, Aminophylline & Their Derivatives and Salts, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share |
|---|---|---|---|---|
| 2939590000 | Theophylline & Aminophylline & Derivs, Salts NESOI | $43K | 0.00% | 0.00% |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2939590000 | Theophylline & Aminophylline & Derivs, Salts NESOI | $35K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
South Africa and Germany together supply 93% of it.
customs district
destination
entry
rate provision · imports
100.0% enters free of duty; duty collected equals 0.00% of imports for consumption.