2,5-Diphenyloxazole (PPO) from Mexico
2,5-Diphenyloxazole is a fluorescent organic compound classified under HTS 2934.99.08.00 as an aromatic heterocyclic compound containing an oxazole ring with phenyl substituents. It is primarily used as a primary scintillator in liquid scintillation cocktails for detecting beta radiation in radiochemical analysis.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide Safety Data Sheet (SDS) and Certificate of Analysis confirming 99%+ purity as required for research chemicals
• Include end-use statement specifying scintillation/radiochemical applications to avoid misclassification as general dye
• Ensure proper UN-approved packaging for flammable solids (UN3345) with hazard class 4.1 labeling