Tyrothricin Powder from Canada
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.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.60100%Pharmaceuticals: patented pharma articles — 100% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Provide mass spectrometry data showing gramicidin/tyrocidine ratio typical of natural extract
• Declare as mixture of isomers per chapter note (b) to justify Chapter 29 classification
• Ensure not pre-mixed with carriers, which would shift to Chapter 30 medicaments