Harmonized Tariff Schedule of the U.S. › Chapter 29 Organic chemicals
2939.51.00.00Tariff line
Classification path
Alkaloids, natural or reproduced by synthesis, and their salts, ethers, esters and other derivatives
2939
Theophylline and aminophylline (theophylline- ethylenediamine) and their derivatives; salts thereof
Fenetylline (INN) and its salts
2939.51.00.00
Rates of duty
General rate (Column 1)Free
Special—
Column 225%
Unitkg
Printed page 1576
Measure flags
for origin CN, entry date 2026-10-26 · base rate Free
- Section 301 forced-labor tariff (12.5%)9903.05.31Applies+12.5%China: Column 1 rate + 12.5% additional
- China 301: not on any listN/A—8-digit subheading 2939.51.00 is not on Lists 1–4B or the four-year-review lists
- PGAFDA FD2 · requiredDEA DE1
Confirmed total 12.5% · max 12.5%Full duty breakdown →