Chapter 29: Organic chemicals
HTS heading 2935: Sulfonamides
21 numbered lines under heading 2935, including 19 10-digit statistical lines. The first six digits are the international HS subheading; the general column is the normal US duty rate.
| HTS code | Description | Unit | General | Special | Column 2 |
|---|---|---|---|---|---|
| 2935 | Sulfonamides: | ||||
| 2935.10.00.00 | N-Methyl perfluorooctane sulfonamide | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57.5% |
| 2935.20.00.00 | N-Ethyl perfluorooctane sulfonamide | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57.5% |
| 2935.30.00.00 | N-Ethyl -N-(2-hydroxyethyl)perfluorooctane sulfonamide | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57.5% |
| 2935.40.00.00 | N-(2-hydroxyethyl)-N-methyl perfluorooctane sulfonamide | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57.5% |
| 2935.50.00.00 | Other perfluorooctane sulfonamides | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57.5% |
| 2935.90 | Other: | ||||
| 2935.90.06.00 | 4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam) | kg | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 41% |
| 2935.90.10.00 | 2-Amino-N-ethylbenzenesulfonanilide; 5-Amino-α,α,α-trifluorotoluene-2,4-disulfonamide; Benzenesulfonamide; Benzenesulfonyl hydrazide; 2-Chloro-4-amino-5-hydroxybenzenesulfonamide; 2,5-Dimethoxysulfanilanilide; and Metanilamide | kg | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 41% |
| 2935.90.13.00 | (5‐[2‐Chloro‐4‐ (trifluoromethyl)phenoxy]‐N‐ (methylsulfonyl)‐2‐nitrobenzamide) (Fomesafen); N‐(2,6‐Dichloro‐3‐ methylphenyl)‐5‐ amino‐1,3,4‐triazole‐2‐sulfonamide; 2,4‐Dichloro‐5‐ sulfamoylbenzoic acid; N‐Ethyl‐o‐ toluenesulfonamide; N‐Ethyl‐p‐toluenesulfonamide; 7-(Hexadecylsulfonylamino) ‐1H‐indole; Methyl 5‐{[(4,6‐dimethoxy‐2‐pyrimidinyl)amino]‐ carbonylaminosulfonyl} ‐3‐chloro‐1‐methyl‐1H‐pyrazole‐4‐carboxylate (Halosulfuron methyl); and Mixtures of ortho‐ and para-toluenesulfonamides | kg | Free | 15.4¢/kg + 57.5% | |
| 2935.90.15.00 | o-Toluenesulfonamide | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57.5% |
| Other: | |||||
| 2935.90.20.00 | Fast color bases and fast color salts | kg | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 54.5% |
| Drugs: | |||||
| Anti-infective agents: | |||||
| 2935.90.29.00 | Acetylsulfaguanidine | kg | Free | 15.4¢/kg + 96% | |
| 2935.90.30.00 | Sulfamethazine | kg | Free | 15.4¢/kg + 80% | |
| 2935.90.32.00 | Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium | kg | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 96% |
| 2935.90.33.00 | Sulfathiazole and Sulfathiazole, sodium | kg | Free | 15.4¢/kg + 133% | |
| 2935.90.42.00 | Salicylazosulfapyridine (Sulfasalazine); Sulfadiazine; Sulfaguanidine; Sulfamerizine; and Sulfapyridine | kg | Free | 15.4¢/kg + 128.5% | |
| 2935.90.48.00 | Other | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 96% |
| 2935.90.60.00 | Other | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 45% |
| Other: | |||||
| 2935.90.75.00 | Products described in additional U.S. note 3 to section VI | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57.5% |
| 2935.90.95.00 | Other | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 57.5% |
| XI. PROVITAMINS, VITAMINS AND HORMONES |
Statistical (10-digit) lines without a rate use the rate of the 8-digit line above them. Additional duties such as Section 301 and Section 232 may apply; check them with the tariff checker.
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Request a free auditSource: Harmonized Tariff Schedule of the United States, 2026 HTS Revision 20 (effective 2026-09-28), U.S. International Trade Commission (hts.usitc.gov), imported 2026-10-07. Reference only; not legal or customs advice or a binding classification. Additional duties under Chapter 99 may apply. ShipWave is not affiliated with the USITC or U.S. Customs and Border Protection.