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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cyclic acetal form
Chapter notes exclude cyclic derivatives from alkaloid headings.
If alcohol ester dominates
Alcohol esters classified with later numerical heading per note 5(A).
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Import Tips & Compliance
• Validate hydroxypropyl substitution via NMR spectra; comply with USP monograph if applicable; separate from finished veterinary meds
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.
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.
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.
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.