3204.90.00.00/Fluorescent Brightener OB-1/Mexico

Fluorescent Brightener OB-1 from Mexico

OB-1 (CAS 1533-45-5) is a synthetic organic stilbene-based fluorescent brightening agent used in polyester and plastic whitening. Falls under HTS 3204.90.00.00 as synthetic products used as fluorescent brightening agents per heading scope. Absorbs UV light and emits blue fluorescence for brightness.

Duty Rate — Mexico → United States

15.9%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

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Import Tips

• Supply UV absorption spectra (370nm peak) and emission data to confirm FBA classification

• Include polymerization compatibility certificates for textile/plastics applications

• Avoid claiming as UV absorber (Chapter 29) without fluorescence properties