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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If nitrogen hetero-atom contamination found
Any nitrogen incorporation shifts to Chapter 29 azines (2933) per hetero-atom priority.
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Import Tips & Compliance
• Provide structural comparison to named compound in classification ruling request
• Ensure batch CoA specifies aromatic heterocyclic oxygen-only structure
Related Products under HTS 2932.99.35.00
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.
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.
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.