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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 > Other
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Subheadings
Products classified under Tariff item 2939.59
Acefylline Piperazine Salt
Acefylline piperazine is a salt formed between acefylline (theophylline-7-acetic acid) and piperazine, used as a vasodilator. As an organic salt of a theophylline derivative, it is classified under tariff item 2939.59.00 as 'Other' theophylline derivatives, per Chapter 29 Note 5(C)(1).
2939.59.00Aminophylline Powder
Aminophylline is a defined complex of theophylline and ethylenediamine, explicitly listed in the tariff item description. It is a bronchodilator used in asthma and COPD treatments. The product is a separate chemically defined compound, qualifying under Chapter 29 Note 1(a).
2939.59.00Bamethan Theophylline
Bamethan theophylline is a combination of the vasodilator bamethan and theophylline, forming a salt or derivative. As a theophylline derivative with an additional amine function, it falls under tariff item 2939.59.00 as 'Other'. The product is a separate chemically defined compound used in circulatory medications.
2939.59.00Caffeine Anhydrous Powder
Caffeine anhydrous is a xanthine alkaloid, structurally related to theophylline but with a different methyl substitution pattern. It is not a theophylline derivative; it is a separate alkaloid of heading 29.39. Therefore, it does not fall under tariff item 2939.59.00 but under a different subheading for caffeine.
2939.59.00Choline Theophyllinate
Choline theophyllinate is a quaternary ammonium salt of theophylline, used for its gastric protection properties. As an organic salt of a theophylline derivative, it is classified under tariff item 2939.59.00 as 'Other', per Chapter 29 Note 5(C)(1). The product is a separate chemically defined compound.
2939.59.00Dyphylline API
Dyphylline is 7-(2,3-dihydroxypropyl)theophylline, a theophylline derivative used as a bronchodilator. It is a separate chemically defined compound, classified under tariff item 2939.59.00 as 'Other' theophylline derivatives. The product is a pure active pharmaceutical ingredient (API).
2939.59.00Paraxanthine Pharmaceutical Intermediate
Paraxanthine is 1,7-dimethylxanthine, a metabolite of caffeine and a structural isomer of theophylline. It is not a theophylline derivative but a separate xanthine alkaloid. Therefore, it does not fall under tariff item 2939.59.00; it is classified under another subheading for xanthine alkaloids.
2939.59.00Pentoxifylline Research Grade
Pentoxifylline is 3,7-dimethyl-1-(5-oxohexyl)xanthine, a theophylline derivative with a hemorheologic action. It is a separate chemically defined compound, classified under tariff item 2939.59.00 as 'Other' theophylline derivatives. The product is a research-grade chemical.
2939.59.00Proxyphylline Pure Substance
Proxyphylline is 7-(2-hydroxypropyl)theophylline, a theophylline derivative used as an expectorant. It is a separate chemically defined compound, classified under tariff item 2939.59.00 as 'Other' theophylline derivatives. The product is a bulk pharmaceutical chemical.
2939.59.00Theobromine Crystals
Theobromine is 3,7-dimethylxanthine, a xanthine alkaloid found in cocoa. It is structurally similar to theophylline but is a distinct compound, not a derivative of theophylline. Therefore, it does not fall under tariff item 2939.59.00; it is classified under a separate subheading for theobromine.
2939.59.00Theophylline Ethanolamine
Theophylline ethanolamine is a salt formed between theophylline and ethanolamine, used for improved solubility in pediatric formulations. As an organic salt of theophylline, it is classified under tariff item 2939.59.00 as 'Other', per Chapter 29 Note 5(C)(1). The product is a separate chemically defined compound.
2939.59.00Theophylline Guaiacol Ester
Theophylline guaiacol ester is an ester formed between theophylline and guaiacol, used for sustained release. As an ester of a theophylline derivative, it is classified under tariff item 2939.59.00 as 'Other', per Chapter 29 Note 5(A). The product is a separate chemically defined compound.
2939.59.00Theophylline Sodium Glycinate
Theophylline sodium glycinate is a salt formed between theophylline, sodium, and glycine, used for injectable bronchodilation. As an organic salt of theophylline, it is classified under tariff item 2939.59.00 as 'Other', per Chapter 29 Note 5(C)(1). The product is a separate chemically defined compound.
2939.59.00Theophylline USP Grade
Theophylline USP grade is the pure alkaloid theophylline, a bronchodilator used in respiratory medications. It is explicitly covered by tariff item 2939.59.00, which includes theophylline and its derivatives. The product meets USP standards and is a separate chemically defined compound.