3-Aminocarbazole
3-Aminocarbazole is a modified aromatic derivative of carbazole with an amino group substitution, maintaining the core heterocyclic nitrogen structure required by HTS 2933.99.11.00. Used as an intermediate in pharmaceutical and optical brightener synthesis.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If amino group considered principal function
Per Chapter 29 notes, compounds could be classified by oxygen/nitrogen function (2921) but heterocyclic structure takes precedence in 2933
If non-aromatic carbazole derivatives
Saturated or non-aromatic modifications of carbazole structure classified later in same heading but different statistical suffix
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Import Tips & Compliance
• Submit structural formula and NMR spectrum confirming carbazole core with single functional modification to avoid reclassification
• Include end-use statement if for pharmaceutical intermediates to facilitate FDA pre-clearance
Related Products under HTS 2933.99.11.00
Carbazole Powder
Pure carbazole (C12H9N) is a tricyclic aromatic heterocyclic compound with nitrogen hetero-atom, classified under HTS 2933.99.11.00 as an aromatic heterocyclic compound. It appears as white to pale yellow flakes or powder, primarily used as an intermediate in dye and pigment production.
N-Ethylcarbazole
N-Ethylcarbazole features ethylation on the nitrogen hetero-atom of the carbazole ring system, qualifying as modified aromatic under HTS 2933.99.11.00. Widely used in organic electronics, photorefractive materials, and dye intermediates.
Carbazole Technical Grade 98%
Technical grade carbazole (98% purity) contains minor impurities but remains a separate chemically defined organic compound per Chapter 29 note (a), classified under HTS 2933.99.11.00. Primarily used in large-scale dye and agrochemical manufacturing.
4-Carbazoleboronic Acid
4-Carbazoleboronic acid retains the core carbazole heterocyclic structure with boronic acid substitution, classified as modified aromatic under HTS 2933.99.11.00 per Chapter 29 organo-inorganic compound rules. Essential Suzuki coupling reagent for pharmaceutical synthesis.
9H-Carbazole Flakes
9H-Carbazole in flake form is the standard commercial presentation of this aromatic heterocyclic compound, classified specifically under HTS 2933.99.11.00. Used extensively in production of carbazole violet pigments and pharmaceuticals.