UPDATE: Section 122 tariff (10%) in effect since Feb 24 — expires ~July 24 (~126 days). 24 states challenge in court (March 5). USTR launches new Section 301 probes (March 11). EU trade deal vote imminent. Full analysis →

HTS 2933 — Heterocyclic compounds Tariff Rate (2026)

Heterocyclic compounds with nitrogen hetero-atoms. Fundamental building blocks for pharmaceuticals and agrochemicals.

Duty Rates

3.7%

MFN Rate

10%

Section 122

N/A

Section 232

25%

Section 301 (China)

Top Countries of Origin

Under HTS 2933, heterocyclic compounds enter the United States with a 3.7% MFN duty rate as the base MFN rate. Heterocyclic compounds with nitrogen hetero-atoms. Fundamental building blocks for pharmaceuticals and agrochemicals. All imports under this heading are subject to the 10% Section 122 tariff (effective February 24, 2026). Chinese imports face an additional Section 301 tariff of 25%. The top countries of origin for HTS 2933 imports include CN, IN, IE, CH, DE. Tariff rates vary by source country based on applicable trade agreements and special tariff programs.

Frequently Asked Questions

What is the tariff rate for HTS 2933 (Heterocyclic compounds)?

The MFN duty rate for HTS 2933 is 3.7%. All imports also face the 10% Section 122 tariff. China Section 301: 25%.

Where do most HTS 2933 imports come from?

The top origin countries for heterocyclic compounds are CN, IN, IE, CH, DE. Tariff rates vary based on the source country's trade agreements and applicable surcharges.

Will the tariff on HTS 2933 change in 2026?

The 10% Section 122 tariff expires approximately July 24, 2026 unless Congress acts. MFN rates and Section 232/301 tariffs have no set expiration. Monitor legislative and executive actions for changes.