Paraxanthine Pharmaceutical Intermediate
Paraxanthine is a primary caffeine metabolite and theophylline-related dimethylxanthine used in nootropic supplements. Classified in HTS 2939.59.00.00 as 'other' xanthine alkaloid derivatives. Synthetic production for research and cognitive enhancement products.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in blood antisera or vaccines
Immunological products containing alkaloids excluded by chapter note 2(e).
If saturated acyclic derivatives
Chapter notes exclude certain hydrocarbon isomers from alkaloid classification.
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Import Tips & Compliance
• Provide synthetic pathway documentation; label as research chemical if not USP; monitor for caffeine impurity thresholds under FDA DSHEA rules
Related Products under HTS 2939.59.00.00
Caffeine Anhydrous Powder
Pure caffeine anhydrous is a naturally derived alkaloid reproduced by synthesis, used in pharmaceuticals, energy drinks, and supplements. It falls under HTS 2939.59.00.00 as 'other' theophylline and aminophylline derivatives and their salts, being a purine alkaloid structurally related to theophylline. This classification covers its chemical purity and common industrial applications.
Theophylline USP Grade
Theophylline USP is a methylxanthine alkaloid used as a bronchodilator in respiratory medications. Classified under HTS 2939.59.00.00 as a theophylline derivative in pure form for pharmaceutical synthesis. Meets USP standards for medicinal applications.
Aminophylline Powder
Aminophylline is theophylline ethylenediamine complex, a soluble derivative used in asthma treatments. Falls under HTS 2939.59.00.00 as specified 'aminophylline (theophylline-ethylenediamine) and their derivatives.' Provided as sterile powder for injection or oral use.
Theobromine Crystals
Theobromine is a xanthine alkaloid from cocoa, structurally similar to theophylline, used in cosmetics and pharmaceuticals. HTS 2939.59.00.00 covers it as 'other' theophylline derivatives in crystalline form. Common in chocolate-derived supplements.
Dyphylline API
Dyphylline (7-(2,3-dihydroxypropyl)theophylline) is a theophylline derivative bronchodilator for veterinary and human use. Pure active pharmaceutical ingredient under HTS 2939.59.00.00 as 'other' derivative. Water-soluble for syrup formulations.
Proxyphylline Pure Substance
Proxyphylline (7-(2-hydroxypropyl)theophylline) is a soluble theophylline derivative for expectorant medications. HTS 2939.59.00.00 classification for bulk pharmaceutical chemical. Used in cough syrup active ingredient.