Fluorescent Brightener OB-1 from Canada
Fluorescent Brightener OB-1 (CAS 1533-45-5) is a synthetic organic stilbene derivative used as an optical brightening agent in polyester fibers and plastics. Falls under HTS 3204.19.50.00 as other synthetic products used as fluorescent brightening agents per heading scope. Absorbs UV light and emits blue fluorescence for whiteness enhancement.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Provide fluorescence emission spectra (peaks at 430nm) and application data to confirm brightener function vs. regular dye
• Ensure not chemically defined as pure compound (Chapter 29 exclusion); commercial grade mixtures qualify here