2934.99.70.00/6R-trans-7-Amino-3-Methyl-8-Oxo-5-Thia-1-Azabicyclo[4.2.0]Oct-2-Ene-2-Carboxylic Acid/Mexico
6R-trans-7-Amino-3-Methyl-8-Oxo-5-Thia-1-Azabicyclo[4.2.0]Oct-2-Ene-2-Carboxylic Acid from Mexico
This beta-lactam nucleus (6R-trans-7-amino-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid) is explicitly listed in HTS 2934.99.70.00 as a heterocyclic intermediate for cephalosporin antibiotic synthesis. The bicyclic ring system with sulfur and nitrogen heteroatoms qualifies it as an 'other heterocyclic compound' under heading 2934.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• FDA import alert 99-20 may apply; provide DMF or drug master file for pharmaceutical intermediates
• Include stereochemical confirmation (6R-trans configuration) via chiral HPLC analysis
• Classify as UN 2811 (toxic solid, organic) with appropriate GHS labeling