</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

Indoline from China

The fully saturated analogue of indole, explicitly listed under HTS 2933.99.1200 as a modified aromatic nitrogen heterocycle. Used as dye intermediate and pharmaceutical building block. Its bicyclic structure with nitrogen hetero-atom qualifies precisely.

Duty Rate — China → United States

18.3%

Rate breakdown

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China

Import Tips

Oxidation stabilizer presence must be documented

Dye vs pharma end-use affects documentation requirements

Dark storage/handling instructions required