2935.90.06.00
4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam)
Classification path
- Sulfonamides
- Other
- 4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam)
Rates of duty
- General (MFN)
- 6.5%
- Column 2Cuba, North Korea, Russia, Belarus
- 15.4¢/kg + 41%
- Unit of quantity
- kg
Trade agreement rates
Related lines in heading 2935
- 2935.10.00.00N-Methyl perfluorooctane sulfonamide6.5%
- 2935.20.00.00N-Ethyl perfluorooctane sulfonamide6.5%
- 2935.30.00.00N-Ethyl -N-(2-hydroxyethyl)perfluorooctane sulfonamide6.5%
- 2935.40.00.00N-(2-hydroxyethyl)-N-methyl perfluorooctane sulfonamide6.5%
- 2935.50.00.00Sulfonamides / Other perfluorooctane sulfonamides6.5%
- 2935.90.10.002-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 Metanilamide6.5%
- 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-toluenesulfonamidesFree
- 2935.90.15.00Sulfonamides / o-Toluenesulfonamide6.5%
- 2935.90.20.00Fast color bases and fast color salts6.5%
- 2935.90.29.00Sulfonamides / Drugs / Anti-infective agents / AcetylsulfaguanidineFree
- 2935.90.30.00Sulfonamides / Drugs / Anti-infective agents / SulfamethazineFree
- 2935.90.32.00Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium6.5%
About heading 2935
Sulfonamides
Heading 2935 covers sulfonamides, a group of organic chemicals in chapter 29 that contain the sulfonamide (SO2NH) function. The heading splits first by specific perfluorooctane sulfonamides in lines 2935.10 through 2935.50, then by named and residual sulfonamides under 2935.90, including fast color bases and salts and pharmaceutical anti-infective agents. Most lines carry a 6.5% general (MFN) rate, while several named drug lines and one named chemical line are Free.
Full guide to heading 2935Products in this heading
- Sulfamethazine
- Sulfathiazole
- Sulfasalazine (salicylazosulfapyridine)
- Sulfadiazine
- Asulam (methyl-4-aminobenzenesulfonylcarbamate)
- o-Toluenesulfonamide
- N-Ethyl perfluorooctane sulfonamide
- Fast color bases and fast color salts
Frequently asked questions
What is the HTS code for sulfamethazine?
Sulfamethazine as an anti-infective drug is classified under 2935.90.30.00. The general (MFN) rate for that line is Free.
What is the duty on o-toluenesulfonamide?
o-Toluenesulfonamide is classified under 2935.90.15.00. The general (MFN) rate for that line is 6.5%.
How do I classify a perfluorooctane sulfonamide?
Match the exact chemical name to the named lines 2935.10.00.00 through 2935.40.00.00, each at a general (MFN) rate of 6.5%. Perfluorooctane sulfonamides not named in those lines go under 2935.50.00.00, also at 6.5%.
Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.