Heading 2935: Sulfonamides
Every line of heading 2935 in the U.S. Harmonized Tariff Schedule, with its general (column 1) duty rate. Open a code for the landed cost calculator, trade agreement rates and email alerts if the rate changes.
Sulfonamides
Chapter 29: Organic chemicals. Schedule checked on November 8, 2026.
Not always the total: additional chapter 99 duties (such as Section 232 or Section 301), antidumping or countervailing duties may apply depending on the country of origin. See recent chapter 99 changes →
Tariff lines
| HTS code | Official description | General rate |
|---|---|---|
| 2935.10.00.00 | N-Methyl perfluorooctane sulfonamide | 6.5% |
| 2935.20.00.00 | N-Ethyl perfluorooctane sulfonamide | 6.5% |
| 2935.30.00.00 | N-Ethyl -N-(2-hydroxyethyl)perfluorooctane sulfonamide | 6.5% |
| 2935.40.00.00 | N-(2-hydroxyethyl)-N-methyl perfluorooctane sulfonamide | 6.5% |
| 2935.50.00.00 | Other perfluorooctane sulfonamides | 6.5% |
| 2935.90 | Other: | |
| 2935.90.06.00 | 4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam) | 6.5% |
| 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 | 6.5% |
| 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 | Free |
| 2935.90.15.00 | o-Toluenesulfonamide | 6.5% |
| 2935.90.20.00 | Fast color bases and fast color salts | 6.5% |
| 2935.90.29.00 | Acetylsulfaguanidine | Free |
| 2935.90.30.00 | Sulfamethazine | Free |
| 2935.90.32.00 | Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium | 6.5% |
| 2935.90.33.00 | Sulfathiazole and Sulfathiazole, sodium | Free |
| 2935.90.42.00 | Salicylazosulfapyridine (Sulfasalazine); Sulfadiazine; Sulfaguanidine; Sulfamerizine; and Sulfapyridine | Free |
| 2935.90.48.00 | Other | 6.5% |
| 2935.90.60.00 | Other | 6.5% |
| 2935.90.75.00 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2935.90.95.00 | Other | 6.5% |
Public records · unclaimed listings
U.S. manufacturers in this industry, from public records
These companies are not Fromerica members and did not write these listings: Fromerica created them from public government records and has not verified what the records say. You cannot contact them from here. Open a listing to see what the record says.
- BEDOUKIAN RESEARCH, INC.
- EMBALMERS' SUPPLY COMPANY, THE
- FMI CHEMICAL, INC.
- HAMPFORD RESEARCH, INC.
- KING INDUSTRIES, INC.
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And 3 more in the public records. See all →
Exporting this product from the U.S.?
Exports are reported with Schedule B numbers. Heading 2935 has 7 of them. Schedule B lookup →
- 2935.10.0000N-METHYL PERFLUOROOCTANE SULFONAMIDE
- 2935.20.0000N-ETHYL PERFLUOROOCTANE SULFONAMIDE
- 2935.30.0000N-ETHYL-N-(2-HYDROXYETHYL) PERFLUOROOCTANE SULFONA
- 2935.40.0000N-(2-HYDROXYETHYL)-N-METHYL PERFLUOROOCTANE SULFONAMIDE
- 2935.50.0000OTHER PERFLUOROOCTANE SULFONAMIDES
- 2935.90.4000SULFONAMIDES USED AS DRUGS
- 2935.90.9550SULFONAMIDES, NESOI
Source: U.S. International Trade Commission, Harmonized Tariff Schedule; Schedule B: U.S. Census Bureau. Information only, not legal or customs advice; U.S. Customs and Border Protection decides the classification and the duty. Confirm with a licensed customs broker before you ship.
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