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HTS 2935Chapter 29

HTS 2935Sulfonamides: Duty Rate & Import Guide

Organic Chemicals · 15 court cases · $72.8M monthly imports · 100% from 1 countries · Updated daily from USITC

Duty Rates

General

Free

Special

Free

Column 2

Free

Trade Agreement Eligibility

CUSMAKORUS

Trade Intelligence

Monthly Imports

$72.8M

2026-01

Trade Concentration

100%

from top 3 of 1 origins

Regulatory Pressure

HIGH

0 rulings — · 0 reg · 9 CIT, 6 CAFC

Global Rates

🇺🇸 Free

🇬🇧 United Kingdom: N/A · 🇪🇺 European Union: N/A · 🇨🇦 Canada: N/A · 🇧🇷 Brazil: N/A

Compare All →

Data compiled from USITC HTS, US Census Bureau, CourtListener · As of 2026-04-28 · Updates monthly

Regulatory Pressure

This code has elevated regulatory activity — 0 CBP rulings (0 in last 2 years, trend: stable), 0 pending Federal Register actions, and 15 CIT/CAFC cases.

Supply Chain Risk

100% of US imports for this code come from just 1 countries. High origin concentration increases exposure to trade disruptions or tariff escalations.

Trade Remedy

Additional Tariffs Apply

Section 301 — China Tariffs+25%

List 2 — ~$16B of Chinese goods (semiconductors, chemicals, plastics)

Active — 7.5%–25% additional duties on Chinese-origin goods across four tranches (Lists 1–4A), with higher 2024/2025 increases on targeted product categories.

Effective 2018-07-06

These additional tariffs apply on top of the general duty rate. View full trade remedy tracker →

Subheadings (20)

CodeDescriptionRate
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%
2935.50.00.00Other perfluorooctane sulfonamides6.5%
2935.90Other:
2935.90.06.004-Amino-6-chloro-<i>m</i>-benzenedisulfonamide and <newline></newline>Methyl-4-aminobenzenesulfonylcarbamate (Asulam)6.5%
2935.90.10.002-Amino-<i>N</i>-ethylbenzenesulfonanilide; <newline></newline>5-Amino-<i>α</i>,<i>α</i>,<i>α</i>-trifluorotoluene-2,4-disulfonamide; <newline></newline>Benzenesulfonamide; <newline></newline>Benzenesulfonyl hydrazide; <newline></newline>2-Chloro-4-amino-5-hydroxybenzenesulfonamide; <newline></newline>2,5-Dimethoxysulfanilanilide; and <newline></newline>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
2935.90.15.00<i>o</i>-Toluenesulfonamide6.5%
2935.90.20.00Fast color bases and fast color salts6.5%
2935.90.29.00AcetylsulfaguanidineFree
2935.90.30.00SulfamethazineFree
2935.90.32.00Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium6.5%
2935.90.33.00Sulfathiazole and Sulfathiazole, sodiumFree
2935.90.42.00Salicylazosulfapyridine (Sulfasalazine); Sulfadiazine; Sulfaguanidine; Sulfamerizine; and SulfapyridineFree
2935.90.48.00Other6.5%
2935.90.60.00Other6.5%
2935.90.75.00Products described in additional U.S. note 3 to section VI6.5%
2935.90.95.00Other6.5%

Court of International Trade & Federal Circuit (15)

View all 15+ cases on PACER →

Matching Export Code (Schedule B)

2935100000Schedule B

N-METHYL PERFLUOROOCTANE SULFONAMIDE

Census Bureau export classification matching this HTS import code.

2933.29.90.002935.10.00.00