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
12.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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