8-Bromotheophylline
8-Bromotheophylline serves as a pharmaceutical intermediate with halogenated xanthine structure, nitrogen heterocyclic only per chapter notes. Included in U.S. note 3 products for 2933.99.79.00. Used in synthesis of bronchodilators.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If phenothiazine structure instead of xanthine
Different specific nitrogen heterocycles have dedicated earlier subheadings.
If halogenated hydrocarbon function dominates
Halogen derivatives classify by principal function per chapter note 4.
If organic derivative of specified heterocycles
Heading 2942 covers certain modified heterocyclic products.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Declare halogen content and provide halide analysis to confirm structure
• Use secondary containment packaging due to lachrymatory properties
• Include downstream synthesis declaration to qualify for intermediate status
Related Products under HTS 2933.99.79.00
Caffeine Anhydrous Powder
Pure caffeine anhydrous is a xanthine alkaloid classified as a heterocyclic compound with nitrogen hetero-atoms only, specifically under aromatic or modified aromatic structures in heading 2933. It falls into 2933.99.79.00 due to U.S. note 3 specifications for certain pharmaceutical intermediates. Used in energy drinks, supplements, and medications.
Theophylline USP Grade
Theophylline is a methylxanthine drug and bronchodilator, a purine derivative with fused heterocyclic nitrogen rings fitting 2933 classification. Specified in U.S. note 3 to section VI for this subheading. Used in respiratory medications and as chemical intermediate.
1-Methylxanthine
1-Methylxanthine is a purine alkaloid metabolite and research chemical with nitrogen-only heterocyclic structure under 2933. Covered by additional U.S. note 3 specifications. Used in biochemical research and pharmaceutical synthesis.
Paraxanthine
Paraxanthine, a caffeine metabolite, features dimethylxanthine structure with nitrogen hetero-atoms in fused rings, aromatic per 2933.99. Falls under U.S. note 3 products. Applied in sports nutrition and metabolic research.
Theobromine Powder
Theobromine, a xanthine alkaloid from cocoa, has purine heterocyclic nitrogen structure qualifying for 2933.99.79.00 per U.S. note 3. Used in cosmetics, pharma intermediates, and veterinary medicine.
Pentoxifylline API
Pentoxifylline is a xanthine derivative used as active pharmaceutical ingredient for circulation disorders, with methylxanthine core fitting 2933 nitrogen heterocycles. U.S. note 3 designated product. Bulk API form excludes finished drugs.