Harmonized Tariff Schedule of the U.S. › Chapter 29 Organic chemicals
2934.99.05.00Tariff line
Classification path
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds
2934
Other
Other
Aromatic or modified aromatic
5-Amino-3-phenyl-1,2,4-thiadiazole (3-Phenyl-5-amino-1,2,4-thiadiazole); 2-Hydroxybenzoxazole (Benzoxazolone); 4-Phenylmorpholine; 1,9-Thianthrenedicarboxylic acid; and Thioxanthene-9-one (Thioxanthone)
2934.99.05.00
Rates of duty
General rate (Column 1)5.8%
SpecialFree (A+, AU, BH, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG)
Column 215.4¢/kg + 39.5%
Unitkg
Free (A+, AU, BH, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG)
Printed page 1566
Measure flags
for origin CN, entry date 2026-10-26 · base rate 5.8%
- 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 2934.99.05 is not on Lists 1–4B or the four-year-review lists
- PGAEPA EP7
Confirmed total 18.3% · max 18.3%Full duty breakdown →