Harmonized Tariff Schedule of the United States · HTS code · HS 2934.99

2934.99.09

2934.99.09: Other heterocyclic compounds: Aromatic or modified aromatic: 1,2-Benzisothiazolin-3-one

Other heterocyclic compounds

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. 2934 Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds:
  2. Other:
  3. 2934.99 Other:
  4. Aromatic or modified aromatic:
  5. 2934.99.09 1,2-Benzisothiazolin-3-one

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

2934.99 Nucleic acids and their salts, whether or not chemically: other, other

USA lines: 2934.99

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.

  • N364523 U.S. CBP 18 September 2026 · 2934.99.30.00

    The tariff classification of Suzetrigine (CAS No. 2649467-58-1) imported in bulk powder form, from India

  • N357497 U.S. CBP 3 February 2026 · 2934.99.30.00

    The tariff classification of Elinzanetant (CAS No. 929046-33-3) in bulk form and LYNKUET® (E linzanetant) Capsules in dosage form, from Germany

  • N354921 U.S. CBP 12 November 2025 · 2934.99.30.00

    The tariff classification of Terazosin Hydrochloride Anhydrous (CAS No. 63074-08-8) in bulk form, from Germany

  • N353870 U.S. CBP 16 October 2025 · 2934.99.30.00

    The tariff classification of Cabotegravir (CAS No. 1051375-10-0) in bulk powder form, from Brazil

  • 600011586 HMRC 7 January 2025 – 6 January 2028 · 2934 99 90 90

    DNA is a double-stranded molecule forming a double helix. Each strand is made up of nucleotides, which include a phosphate group, a sugar molecule (deoxyribose), and one of four nitrogenous bases: adenine (A), thymine (T), cytosine ©, and guanine (G). RNA is typically single-stranded and shorter…

  • 600010728 HMRC 2 September 2024 – 1 September 2027 · 2934 99 90 90

    PolyIC Polyinosinic Acid, sodium salt - a double strand RNA Use: in the treatment of neoplastic diseases Packaging: 10ml sterile glass vial. Transport is frozen at -78°C

  • 600010731 HMRC 21 August 2024 – 20 August 2027 · 2934 99 90 90

    nucleic acid samples RNA (ribonucleic acid) and DNA (deoxyribonucleic acid) Used for clinical trials, laboratory research or diagnostic use Packaging: in test tubes or slides

47 rulings in total for this code

Legal notes

Notes

Chapter notes: Chapter 29 →

In the Harmonized Tariff Schedule of the United States, 2934.99.09 is one of 19 lines under subheading 2934.99, nucleic acids and their salts, whether or not chemically: other, 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 0%–3.1%, the Taiwan duty is 0%–6.5%, 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 2934.99 worth US$6bn in 2024; the largest supplier was Singapore, and the United Kingdom ranked 8th with US$168m.

Questions and answers

What is the USA import duty for HTS code 2934.99.09?

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 2934.99 as a whole, the largest supplier in 2024 was Singapore (US$2bn), followed by Ireland.

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