HTS Heading 2934

Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds

All 43 HTS codes under heading 2934 (nucleic acids and their salts), with their duty rates from the 2026 HTS Revision 23. General duty Free to 6.5%.

Every line of heading 2934

  • 2934 Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds.
  • 2934.10 Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure.
  • 2934.10.10.00 Products described in additional U.S. note 3 to section VI (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) 3.25% (JP); Column 2 15.4¢/kg + 52%.
  • 2934.10.20.00 Other (under: Aromatic or modified aromatic) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.10.70.00 4,5-Dichloro-2-n-octyl-4-isothiazolin-3-one; Ethyl 2-(2-aminothiazol-4-yl)-2- hydroxyiminoacetate; Ethyl 2-(2-aminothiazol-4-yl)-2- methoxyiminoacetate; 2-Methyl-4-isothiazolin- 3-one; 2-n-Octyl-4-isothiazolin-3-one; and Thiothiamine hydrochloride (kg): General Free; Special none; Column 2 30.5%.
  • 2934.10.90.00 Other (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG) 3.25% (JP); Column 2 30.5%.
  • 2934.20 Compounds containing in the structure a benzothiazole ring-system (whether or not hydrogenated), not further fused.
  • 2934.20.05.00 N-tert-Butyl-2-benzothiazolesulfenamide (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.20.10.00 2,2'-Dithiobisbenzothiazole (under: Compounds containing in the structure a benzothiazole ring-system (whether or not hydrogenated), not further fused) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2934.20.15.00 2-Mercaptobenzothiazole; andN-(Oxydiethylene)benzothiazole-2-sulfenamide (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.20.20.00 2-Mercaptobenzothiazole, sodium salt (2-Benzothiazolethiol, sodium salt) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2934.20.25.00 2-Amino-5,6-dichloro benzo thiazole; 2-(4-Amino phenyl)-6-methyl benzo thiazole-7- sulfonic acid; 2-Amino-6-nitro benzo thiazole; andN,N-Di cyclo hexyl-2-benzo thiazole sulfenamide (kg): General Free; Special none; Column 2 15.4¢/kg + 52%.
  • 2934.20.30.00 2-Amino-6-methoxy benzo thiazole; 2-Amino-6-methyl benzo thiazole; 6-Ethoxy-2-benzo thiazo lethiol; 3-Methyl benzo thiazole-2-hydrazone; and Primuline base (kg): General 5.8%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,KR, L,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 39.5%.
  • 2934.20.35.00 Pesticides (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2934.20.40.00 Products described in additional U.S. note 3 to section VI (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.20.80.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.30 Compounds containing in the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused.
  • 2934.30.12.00 2-(Trifluoromethyl)phenothiazine (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 45%.
  • 2934.30.18.00 Ethyl (1H-phenothiazin-2,4,1)carbamate (kg): General Free; Special none; Column 2 15.4¢/kg + 52%.
  • 2934.30.23.00 Antidepressants, tranquilizers and other psychotherapeutic agents (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 149.5%.
  • 2934.30.27.00 Other (under: Drugs) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 45%.
  • 2934.30.43.00 Products described in additional U.S. note 3 to section VI (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.30.50.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.91.00.00 Aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof (kg): General Free; Special none; Column 2 15.4¢/kg + 52%.
  • 2934.92.00.00 Other fentanyls and their derivatives (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 30.5%.
  • 2934.99 Other (under: Other).
  • 2934.99.01.00 Mycophenolate mofetil (under: Aromatic or modified aromatic) (kg): General Free; Special none; Column 2 15.4¢/kg + 45%.
  • 2934.99.03.00 2-Acetylbenzo(b)thiophene; 3-Methylene-7-(2-phenoxyacetamido)- cephan-4-carboxylic acid, p-nitrobenzyl ester, 1-oxide; and Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid and its sodium salt (kg): General Free; Special none; Column 2 15.4¢/kg + 52%.
  • 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) (kg): General 5.8%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 39.5%.
  • 2934.99.06.00 7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 66.5%.
  • 2934.99.07.00 Ethyl 2-[4-[(6-chloro-2-benzoxazolyl)oxy]- phenoxy]propanoate (Fenoxaprop-ethyl) (kg): General Free; Special none; Column 2 15.4¢/kg + 48.5%.
  • 2934.99.08.00 2,5-Diphenyloxazole (under: Aromatic or modified aromatic) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.99.09.00 1,2-Benzisothiazolin-3-one (under: Aromatic or modified aromatic) (kg): General Free; Special none; Column 2 15.4¢/kg + 40.5%.
  • 2934.99.11.00 2-tert-Butyl-4-(2,4-dichloro-5- isopropoxyphenyl)-Δ²-1,3,4- oxadiazolin-5-one; 3-Isopropyl-1H-2,1,3- benzothiadiazin-4-(3H)-one-2,2- dioxide (Bentazon); andO,O-Diethyl-S-[(6-chloro-2- oxobenzoxazolin-3-yl)methyl]- phosphorodithioate (Phosalone) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 40.5%.
  • 2934.99.12.00 Fungicides (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2934.99.15.00 Herbicides (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) 3.25% (JP); Column 2 15.4¢/kg + 48.5%.
  • 2934.99.16.00 Insecticides (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 64.5%.
  • 2934.99.18.00 Other (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2934.99.20.00 Photographic chemicals (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 50%.
  • 2934.99.30.00 Drugs (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 45%.
  • 2934.99.39.00 Products described in additional U.S. note 3 to section VI (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.99.44.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 52%.
  • 2934.99.47 Drugs (under: Other): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2934.99.47.20 Rocuronium (INN) and its salts (kg).
  • 2934.99.47.30 Tacrolimus (INN) and its salts (kg).
  • 2934.99.47.40 Timolol maleate and its salts (kg).
  • 2934.99.47.90 Other (under: Drugs) (kg).
  • 2934.99.70.00 Morpholinoethyl chloride hydrochloride; 2-Methyl-2,5-dioxo-1-oxa-2-phospholan; and (6R-trans)-7-Amino-3-methyl-8-oxo-5- thia-1-azabicyclo[4.2.0]-oct-2-ene-2- carboxylic acid (kg): General Free; Special none; Column 2 30.5%.
  • 2934.99.90.01 Other (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 30.5%.

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.