Pharmaceutical Ammonium Carbonate Crystals from Mexico
High-purity ammonium carbonate crystals used in pharmaceutical formulations as a buffering agent and expectorant. It qualifies for HTS 2836.99.30.00 as commercial ammonium carbonate with carbamate, meeting Chapter 28 definitions for inorganic carbonates of ammonium. USP-grade ensures compliance for medicinal use.
Duty Rate — Mexico → United States
11.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Provide USP or NF certificates of analysis to prove pharmaceutical grade and avoid reclassification
• Declare intended medicinal end-use to comply with FDA import alerts for drug precursors