Meldrum's Acid from Canada
Meldrum's acid (2,2-dimethyl-1,3-dioxane-4,6-dione) is a cyclic diester used in organic synthesis, classified under HTS 2942.00.50.00 as 'other' organic compounds. This highly acidic beta-diketone equivalent features a six-membered heterocyclic ring.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6096.3%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
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Hygroscopic; ship ≤20% RH with moisture content analysis (<0.5%)
• pKa 4.97 documentation and decarboxylation temperature (>140°C) data
• Distinguish from pharmaceutical intermediates under stricter FDA controls