Polymyxin B Sulfate Powder from Mexico
Polymyxin B sulfate, a natural polypeptide antibiotic from Bacillus polymyxa, treats multidrug-resistant Gram-negative infections. Classified under HTS 2941.90.10.50 as an unnamed natural antibiotic per chapter notes for chemically defined organic compounds. Supplied as sterile bulk powder for pharmaceutical compounding.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Include microbial origin certificate; polymyxin must trace to natural Bacillus fermentation
• Comply with USP monograph testing; ensure potency >6,000 units/mg to avoid reclassification
• Label as 'not for direct human use' if bulk to prevent Chapter 30 misclassification