Phenylbutazone API from Japan

Phenylbutazone is an aromatic imine derivative used as a non-steroidal anti-inflammatory drug for veterinary and human pain relief. Classified under HTS 2925.29.20.00 as a drug with imine-function in its aromatic structure. Imported as bulk powder for tablet manufacturing.

Duty Rate — Japan → United States

15%

Rate breakdown

9903.04.628.5%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate

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)

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Import Tips

• Include veterinary drug approval documentation if for animal use; human use requires Rx status

• Provide polymorph characterization to prevent classification disputes under crystal form rules

• Ensure proper DEA import permit for controlled substance precursors if applicable