Fluorescent Brightener OB-1 from Canada
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 — Canada → United States
15.9%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
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