2-Hydroxy-3-dibenzofurancarboxylic acid
This is a specific aromatic heterocyclic compound with oxygen hetero-atoms only, featuring a dibenzofuran core with a hydroxy group at position 2 and a carboxylic acid at position 3. It falls under HTS 2932.99.35.00 as it precisely matches the legal description for this subheading within Chapter 29 for separate chemically defined organic compounds. Used primarily as a pharmaceutical intermediate and in organic synthesis.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not specifically the named compound but another aromatic heterocyclic
Other aromatic heterocyclics with oxygen hetero-atoms fall under the residual 2932.99.60; this subheading is specific to named compound.
If classified primarily by phenolic hydroxy function
Phenols with additional functions may shift to Chapter 29 oxygen-function headings if not fitting heterocyclic definition.
If imported as sodium salt for stability
Inorganic salts of organic acids classified with parent acid per Chapter Note 3(C)(1), but if coordination complex, follows last numerical order.
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Import Tips & Compliance
• Provide detailed chemical analysis (NMR, IR, MS) confirming structure matches 2932.99.35.00 exactly; mismatches lead to reclassification
• Include Certificate of Analysis (CoA) and Safety Data Sheet (SDS) verifying purity >98% and absence of isomers
• Ensure packaging complies with UN/DOT hazardous material regs for carboxylic acids (Corrosive Class 8)
Related Products under HTS 2932.99.35.00
Esculetin (6,8-Dihydroxy-2H-1-benzopyran-2-one)
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.
2-Hydroxy-3-dibenzofurancarboxylic acid, 98% purity
Technical grade 2-Hydroxy-3-dibenzofurancarboxylic acid with 98% purity, containing minor impurities but still chemically defined per Chapter Note 1(a). Directly matches HTS 2932.99.35.00 as the specific named aromatic heterocyclic compound with oxygen hetero-atoms. Supplied as off-white powder for synthetic applications.
Dibenzofuran-2-carboxylic acid
Close structural analog to the specific HTS-named compound, this aromatic oxygen-heterocyclic carboxylic acid classified under 2932.99.35.00 when documentation emphasizes dibenzofuran core similarity. Used in materials science and as dye intermediate.
4-Hydroxycoumarin
4-Hydroxycoumarin, a hydroxylated benzopyrone heterocyclic with oxygen hetero-atoms only, aromatic. Falls under HTS 2932.99.35.00 as other specified aromatic oxygen-heterocyclics matching chapter scope. Precursor for anticoagulant synthesis.