3-Aminocarbazole from China
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.
Duty Rate — China → United States
0%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• 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