Other
Alkaloids, natural or reproduced by synthesis, and their salts, ethers, esters and other derivatives: > Theophylline and aminophylline (theophylline- ethylenediamine) and their derivatives; salts thereof: > Other
Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified 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.
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.
Acefylline Piperazine Salt
Acefylline piperazine is a theophylline-7-acetic acid piperazine salt, used as a vasodilator. Falls under HTS 2939.59.00.00 per note 5(C)(1) classifying organic salts with parent alkaloid. Stable crystalline form for tablets.
Bamethan Theophylline
Bamethan theophylline is a combined alkaloid-vasodilator derivative for circulatory medications. HTS 2939.59.00.00 as 'other' theophylline derivative with added amine function. Synthetic for peripheral vascular treatment.
Choline Theophyllinate
Choline theophyllinate is a quaternary ammonium salt of theophylline for gastric protection. Classified HTS 2939.59.00.00 following parent alkaloid per salt classification rules. Highly soluble for oral solutions.
Theophylline Sodium Glycinate
Theophylline sodium glycinate combines the alkaloid with amino acid salt for injectable bronchodilation. HTS 2939.59.00.00 per note 5(C) organic salt classification. Sterile grade for emergency respiratory use.
Theophylline Ethanolamine
Theophylline ethanolamine salt improves alkaloid solubility for pediatric formulations. Under HTS 2939.59.00.00 as ethanolamine derivative salt of theophylline. Used in liquid medications.
Pentoxifylline Research Grade
Pentoxifylline (3,7-dimethyl-1-(5-oxohexyl)xanthine) is a theophylline derivative hemorheologic agent. HTS 2939.59.00.00 for research chemical grade before formulation. Inhibits phosphodiesterase activity.
Theophylline Guaiacol Ester
Theophylline guaiacol ester modifies alkaloid pharmacokinetics for sustained release. Classifies HTS 2939.59.00.00 per ester rules following parent xanthine. Used in experimental pulmonology.