Tariff reference › Chapter 29 › 2934.99.05.00
HTS 2934.99.05.00 — 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)
The current US import duty for 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) (HTS 2934.99.05.00) — the base rate, any Section 301/232/122 surcharge that applies, and what's changed recently.
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › 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)
Current US duty rate
| Column 1 (General / MFN) | 5.8% |
|---|---|
| Special (FTA programs) | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| Column 2 (other) | 15.4¢/kg + 39.5% |
No Chapter 99 (Section 301/232/122) cross-reference on this line; origin-specific surcharges may still apply — check the calculator.
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Programmatic access: the full duty stack (base + surcharges + MPF/HMF for a given origin & value) is at /duty?code=2934.99.05.00&origin=&value=. Current as of USITC 2026HTSRev10 (synced 2026-06-12).