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Phenanthroline from China

1,10-Phenanthroline is a tricyclic aromatic heterocyclic compound famous for its metal chelation properties in analytical chemistry. Classified under HTS 2934.99.44.00 as other aromatic heterocycles. Widely used to form colored complexes with iron(II) for titration.

Duty Rate — China → United States

100%

Rate breakdown

9903.04.6093.5%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)

Import Tips

Include usage declaration as analytical reagent to support classification

Ensure packaging prevents moisture absorption which affects chelation properties

CAS 66-71-7 documentation required for positive chemical identification

Phenanthroline from China — Import Duty Rate | HTS 2934.99.44.00