Esculetin (6,8-Dihydroxy-2H-1-benzopyran-2-one) from Canada
Esculetin is a coumarin derivative, a fused heterocyclic system with oxygen hetero-atoms only, aromatic structure. While not exactly 2-hydroxy-3-dibenzofurancarboxylic acid, classified under 2932.99.35.00 when imported as reference standard matching aromatic heterocyclic criteria. Used in biochemical research and as pharmaceutical intermediate.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Submit HPLC purity certificate (>99%) to distinguish from coumarin mixtures under 2932.29
• Label as research chemical with exact CAS number to avoid 2932.99.60 residual classification
• Check REACH/ TSCA registration status for lab/research imports