2934.99.03.00/3-Methylene-7-(2-Phenoxyacetamido)-Cephan-4-Carboxylic Acid, p-Nitrobenzyl Ester, 1-Oxide/Japan

3-Methylene-7-(2-Phenoxyacetamido)-Cephan-4-Carboxylic Acid, p-Nitrobenzyl Ester, 1-Oxide from Japan

This complex beta-lactam derivative is a specific cephalosporin intermediate with a dihydrothiazine ring, explicitly named in HTS 2934.99.03.00 as an aromatic/modified aromatic heterocyclic compound. The p-nitrobenzyl ester protects the carboxylic acid during synthesis of semi-synthetic antibiotics. It qualifies under Chapter 29 for chemically defined heterocyclic compounds used in pharmaceutical manufacturing.

Duty Rate — Japan → United States

Rate breakdown

9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter

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Import Tips

• Submit HPLC chromatograms and structural confirmation to verify exact cephalosporin intermediate matching the HTS description

• Include DEA precursor documentation if applicable, as beta-lactam derivatives may trigger controlled substance scrutiny

• Ensure cold chain documentation (2-8°C) as instability affects classification validity under Chapter 29 solvent notes