Polymyxin B Sulfate Powder
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically modified
Any structural alterations beyond isolation classify as 'other' non-natural antibiotics.
If in vaccine or immunological product
When combined with immunologicals, falls under Chapter 30 exclusions from Chapter 29.
If in complex mixture with stabilizers
Preparations not meeting 'separate chemically defined' criteria go to chemical preparations.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• 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
Related Products under HTS 2941.90.10.50
Streptomycin Sulfate USP
Streptomycin sulfate is a natural antibiotic derived from Streptomyces griseus, used primarily to treat tuberculosis and plague. It falls under HTS 2941.90.10.50 as a natural antibiotic not specifically named elsewhere in heading 2941. This powder form is chemically defined and meets chapter 29 requirements for separate organic compounds.
Bacitracin Zinc USP
Bacitracin zinc, produced by Bacillus subtilis fermentation, is a natural polypeptide antibiotic for topical bacterial infections. HTS 2941.90.10.50 covers this unnamed natural antibiotic as a chemically defined organic compound salt per chapter note (C). The zinc salt form maintains classification with the base antibiotic.
Tyrothricin Powder
Tyrothricin, a natural antibiotic complex from Bacillus brevis containing gramicidin and tyrocidine, used in topical antimicrobials. Falls under HTS 2941.90.10.50 as other natural antibiotics, being a separate chemically defined mixture of isomers from chapter note (b). Primarily imported as bulk powder for formulation.
Viomycin Sulfate
Viomycin sulfate, a natural tuberculostatic antibiotic from Streptomyces puniceus, used in multi-drug resistant TB treatment. HTS 2941.90.10.50 applies to this unnamed natural antibiotic as a chemically defined compound meeting chapter inclusion criteria. Typically imported in bulk for pharmaceutical research and compounding.
Capreomycin Sulfate USP
Capreomycin sulfate, derived from Streptomyces capreolus, is a natural cyclic peptide antibiotic for MDR-TB. Classified in HTS 2941.90.10.50 as other natural antibiotics, qualifying as chemically defined organic compound under chapter note (a). Bulk powder form for injection preparation.