3-Methylene-7-(2-Phenoxyacetamido)-Cephan-4-Carboxylic Acid, p-Nitrobenzyl Ester, 1-Oxide
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered a finished cephalosporin antibiotic
Antibiotic-specific heading 2934.10 if pharmaceutical activity present rather than synthetic intermediate
If classified as amine-function compound
Amido group may shift to 2941 if nitrogen-function dominates over heterocyclic structure per Chapter 29 notes
If for bulk unprotected beta-lactam nucleus
7-ACA core intermediates classified in 2933 if lacking specific side-chain modifications
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Import Tips & Compliance
• 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
Related Products under HTS 2934.99.03.00
2-Acetylbenzo(b)thiophene
2-Acetylbenzo(b)thiophene is a specific aromatic heterocyclic compound featuring a thiophene ring fused to a benzene ring with an acetyl group at the 2-position. It falls under HTS 2934.99.03.00 as one of the explicitly named 'other heterocyclic compounds' in the aromatic category of Chapter 29. This chemically defined organic compound is used as an intermediate in pharmaceutical and agrochemical synthesis.
Naphth[1,2-d]-[1,2,3]-Oxadiazole-5-Sulfonic Acid
Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid is a fused heterocyclic compound explicitly listed in HTS 2934.99.03.00, featuring an oxadiazole ring fused to naphthalene with a sulfonic acid substituent. This aromatic heterocyclic compound serves as a dye intermediate and reagent in organic synthesis. Chapter 29 classification applies to its chemically defined heterocyclic structure.
2-Acetylbenzo(b)thiophene Technical Grade
Technical grade 2-Acetylbenzo(b)thiophene (95-98% purity) matches the specific chemical explicitly named in HTS 2934.99.03.00 as an aromatic heterocyclic compound. Used in scale-up pharmaceutical synthesis, it qualifies under Chapter 29 for chemically defined organic compounds with permitted impurities. The fused thiophene-benzene structure with acetyl functionality defines its classification.
Naphth[1,2-d]-[1,2,3]-Oxadiazole-5-Sulfonic Acid Sodium Salt
The sodium salt of Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid, explicitly covered in HTS 2934.99.03.00, maintains the aromatic heterocyclic classification of Chapter 29. This water-soluble form is preferred for dye manufacturing processes. Salts of organic compounds remain classified with the parent acid per Chapter 29 note 3(C)(1).