Calcofluor White P Fluorescent Agent from China
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 — China → United States
41.5%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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