Colloidal Gold Diagnostic Reagent from Mexico
Gold nanoparticle colloid conjugated with antibodies for lateral flow assays in pregnancy tests. Remains under HTS 2843.10.00.00 if imported as bulk colloid prior to conjugation.
Duty Rate — Mexico → United States
15.5%
Rate breakdown
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
• If pre-conjugated, may require FDA prior notice; bulk colloids do not
• Label as research chemical to avoid immediate medical device scrutiny
• Ensure stability data for long-sea transit without aggregation