Harmonized Tariff Schedule of the United States · HTS code · HS 2935.90

2935.90.13

2935.90.13: Other sulphonamides: (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

Other sulphonamides

Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026

  1. 2935 Sulfonamides:
  2. 2935.90 Other:
  3. 2935.90.13 (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

What you pay

Importing into USA

Customs duty Free standard rate depends on the country of origin
Additional duties and charges —
VAT no federal VAT; a Merchandise Processing Fee of 0.3464 % is charged on formal entries
Duty calculatorCalculate duty and taxes →

US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.

Additional duties and import rules

Charges on top of the customs duty, and rules the goods must meet at the border.

No additional measures recorded for this origin.

Same subheading in other tariffs

2935.90 Sulphonamides, other

UK Free – 6% Third-country duty 38 tariff lines · average 5.7% EU Free – 6.5% Third-country duty 2 tariff lines · average 3.3% Türkiye Free – 6.5% Third-country duty 13 tariff lines · average 6% Canada Free General (MFN) 1 tariff line Mexico Free – 5% General (MFN) 38 tariff lines · average 0.5% Brazil Free – 12.6% General (MFN) 19 tariff lines · average 5.1% Argentina Free – 12.6% General (MFN) 36 tariff lines · average 2.7% Peru Free General (MFN) 2 tariff lines New Zealand Free General (MFN) 1 tariff line Japan 3.9% General (MFN) 1 tariff line Taiwan 5% General (MFN) 8 tariff lines GCC 5% General (MFN) 1 tariff line Switzerland Free General (MFN) 1 tariff line Norway Free General (MFN) 1 tariff line North Macedonia Free – 5% General (MFN) 2 tariff lines · average 2.5% Nigeria 5% General (MFN) 1 tariff line

USA lines: 2935.90

Binding rulings for similar goods

Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.

  • N357263 U.S. CBP 20 July 2026 · 2935.90.75.00

    The tariff classification of N-Phenyl-N-(trichloromethylsulfenyl)-benzenesulfonamide (CAS No. 2280-49-1) from China

  • N360727 U.S. CBP 12 May 2026 · 2935.90.60.00

    The tariff classification of Tenapanor Hydrochloride (CAS No. 1234365-97-9) in bulk form, from Taiwan

  • N344340 U.S. CBP 13 March 2025 · 2935.90.95.00

    The tariff classification of Color Developing Agent 3 (CAS No. 25646-71-3) and Color Developing Agent 4 (CAS No. 25646-77-9) from China imported in bulk form

  • N334917 U.S. CBP 13 September 2023 · 2935.90.75.00

    The tariff classification of Sodium bis(trifluoromethane)sulfonimide (CAS # 91742-21-1) from China

12 rulings in total for this code

Legal notes

Chapter notes: Chapter 29 →

Code history

Since 2017; before, these goods were classified under 2935.00.

HTS code 2935.90.13 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 2935.90 (sulphonamides, other).

The general duty is free, and quantities are declared in kg.

For the same subheading, the UK duty is 0%–6%, the EU duty is 0%–6.5%, the Türkiye duty is 0%–6.5%, the Canada duty is free, the Mexico duty is 0%–5%, the Brazil duty is 0%–12.6%, the Argentina duty is 0%–12.6%, the Peru duty is free, the New Zealand duty is free, the Japan duty is 3.9%, the Taiwan duty is 5%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 0%–5% and the Nigeria duty is 5%.

The United States imported goods of subheading 2935.90 worth US$2bn in 2024; the largest supplier was Ireland, and the United Kingdom ranked 6th with US$41m.

Questions and answers

What is the USA import duty for HTS code 2935.90.13?

The general duty in the Harmonized Tariff Schedule of the United States is free; the supplementary unit is kg. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.

Where does the United States import these goods from?

For subheading 2935.90 as a whole, the largest supplier in 2024 was Ireland (US$1.3bn), followed by Singapore.

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