Calcofluor White P Fluorescent Agent from Canada
Calcofluor White P serves as a synthetic organic fluorescent brightener for microbial staining in labs and cotton pre-treatment in textiles. Under HTS 3204.20.80.00 as other fluorescent brightening agents, it binds to cellulose emitting blue fluorescence. Dual use in biotech and textile whitening.
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
• Dual-function products need end-use letters specifying textile vs lab predominance
• Biohazard labeling if for microbial use, plus EPA registration if pesticide-like
• Purity >98% typical; diluted forms risk 3824 reclassification