# United States tariff lines under HS 2935.90

> The United States tariff splits HS 2935.90 (sulfonamides) into 14 national lines: 2935.90.06.00 (4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam)), 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), 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), 2935.90.15.00 (o-Toluenesulfonamide) and 10 others.

Source: https://border.bot/countries/united-states/hs-codes/293590
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 29](https://border.bot/countries/united-states/hs-codes/29) / [2935.90](https://border.bot/countries/united-states/hs-codes/293590)

## Key facts

- HS subheading: [2935.90](https://border.bot/hs-codes/293590)
- National lines: 14
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 29: Organic chemicals

## United States lines under 2935.90

The United States tariff splits HS 2935.90 (sulfonamides) into 14 national lines: 2935.90.06.00 (4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam)), 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), 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), 2935.90.15.00 (o-Toluenesulfonamide) and 10 others.

- [2935.90.06.00](https://border.bot/countries/united-states/hs-codes/2935900600) Other, 4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam). Duty (MFN): 6.5%
- [2935.90.10.00](https://border.bot/countries/united-states/hs-codes/2935901000) Other, 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. Duty (MFN): 6.5%
- [2935.90.13.00](https://border.bot/countries/united-states/hs-codes/2935901300) Other, (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. Duty (MFN): free
- [2935.90.15.00](https://border.bot/countries/united-states/hs-codes/2935901500) Other, o-Toluenesulfonamide. Duty (MFN): 6.5%
- [2935.90.20.00](https://border.bot/countries/united-states/hs-codes/2935902000) Other, Other, Fast color bases and fast color salts. Duty (MFN): 6.5%
- [2935.90.29.00](https://border.bot/countries/united-states/hs-codes/2935902900) Other, Other, Drugs, Anti-infective agents, Acetylsulfaguanidine. Duty (MFN): free
- [2935.90.30.00](https://border.bot/countries/united-states/hs-codes/2935903000) Other, Other, Drugs, Anti-infective agents, Sulfamethazine. Duty (MFN): free
- [2935.90.32.00](https://border.bot/countries/united-states/hs-codes/2935903200) Other, Other, Drugs, Anti-infective agents, Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium. Duty (MFN): 6.5%
- [2935.90.33.00](https://border.bot/countries/united-states/hs-codes/2935903300) Other, Other, Drugs, Anti-infective agents, Sulfathiazole and Sulfathiazole, sodium. Duty (MFN): free
- [2935.90.42.00](https://border.bot/countries/united-states/hs-codes/2935904200) Other, Other, Drugs, Anti-infective agents, Salicylazosulfapyridine (Sulfasalazine); Sulfadiazine; Sulfaguanidine; Sulfamerizine; and Sulfapyridine. Duty (MFN): free
- [2935.90.48.00](https://border.bot/countries/united-states/hs-codes/2935904800) Other, Other, Drugs, Anti-infective agents, Other. Duty (MFN): 6.5%
- [2935.90.60.00](https://border.bot/countries/united-states/hs-codes/2935906000) Other, Other, Drugs, Other. Duty (MFN): 6.5%
- [2935.90.75.00](https://border.bot/countries/united-states/hs-codes/2935907500) Other, Other, Other, Products described in additional U.S. note 3 to section VI. Duty (MFN): 6.5%
- [2935.90.95.00](https://border.bot/countries/united-states/hs-codes/2935909500) Other, Other, Other, Other. Duty (MFN): 6.5%

## In other countries

No other national tariff on border.bot has live lines under 2935.90 yet.

- [The Harmonized System text for 2935.90](https://border.bot/hs-codes/293590)

- Previous subheading: [2935.50](https://border.bot/countries/united-states/hs-codes/293550) Sulfonamides
- Next subheading: [2936.21](https://border.bot/countries/united-states/hs-codes/293621) Provitamins and vitamins, natural or reproduced by synthesis (including natural concentrates), derivatives thereof used primarily as vitamins, and intermixtures of the foregoing, whether or not in any solvent

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2935.90?

The United States tariff splits HS 2935.90 (sulfonamides) into 14 national lines: 2935.90.06.00 (4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam)), 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), 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), 2935.90.15.00 (o-Toluenesulfonamide) and 10 others.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/293590.json