o-Diquat Dibromide Reference Standard from China
Certified reference material of o-diquat dibromide for analytical laboratory use in pesticide residue testing. Precisely classified under HTS 2933.99.1600 as the pure heterocyclic compound. Used for GC-MS calibration in environmental monitoring.
Duty Rate — China → United States
112.5%
Rate breakdown
9903.04.60100%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
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include NIST-traceable certificate and chromatograms proving analytical reference purity
• Declare as 'analytical reference standard' with CAS 85-00-7 to avoid pesticide use assumptions
• Small package quantities (<1kg) reduce scrutiny but require precise documentation