Harmonized Tariff Schedule of the U.S. › Chapter 29 Organic chemicals
2933.53.00.00Tariff line
Classification path
Heterocyclic compounds with nitrogen hetero-atom(s) only
2933
Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure
Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof
2933.53.00.00
Rates of duty
General rate (Column 1)Free
Special—
Column 250%
Unitkg
Printed page 1553
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 2933.53.00 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 →