Methimazole Tablets API
Methimazole is an imidazole derivative antithyroid drug, a nitrogen heterocyclic compound specifically under HTS 2933.99.90.00 as a drug. It inhibits thyroid hormone synthesis and is imported as active pharmaceutical ingredient.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as other quaternary ammonium compound
Specific imidazole subheading vs general 'other' drugs.
If finished dosage tablets rather than pure API
Completed tablets classified as medicaments in Chapter 30.
If as veterinary thyroid drug rather than human medicine
Organic compounds for animal use may fall under heading 2942.
Not sure which classification is right?
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Import Tips & Compliance
• Submit FDA IND or ANDA documentation for API import
• Ensure stability data for imidazole degradation during shipping
• Check for tapazole trademark issues affecting generic labeling
Related Products under HTS 2933.99.90.00
Caffeine Anhydrous Powder
Pure caffeine anhydrous is a xanthine alkaloid classified as a heterocyclic nitrogen compound under HTS 2933.99.90.00 due to its purine ring structure. It is imported as a pharmaceutical intermediate or drug ingredient for energy supplements and medications.
Theophylline USP Grade
Theophylline is a methylxanthine bronchodilator drug with a fused imidazole-pyrimidine heterocyclic structure, falling under HTS 2933.99.90.00. Used primarily in respiratory medications, it qualifies as a 'drug' per tariff specifications.
Famotidine Active Pharmaceutical Ingredient
Famotidine, a histamine H2-receptor antagonist, features a thiazole-imidazolyl nitrogen heterocyclic structure qualifying for HTS 2933.99.90.00. Imported as bulk drug substance for acid reflux medications like Pepcid.
Loperamide Hydrochloride Bulk Drug
Loperamide HCl, an antidiarrheal piperidine derivative, is a nitrogen heterocyclic compound imported under HTS 2933.99.90.00 as a drug. Its opioid receptor agonist structure fits Chapter 29 drug specifications.
Pyridostigmine Bromide API
Pyridostigmine bromide, a quaternary pyridinium cholinesterase inhibitor, falls under HTS 2933.99.90.00 as a nitrogen heterocyclic drug. Used for myasthenia gravis treatment, imported as sterile bulk powder.
Nicotine Bitartrate Dihydrate USP
Nicotine bitartrate, the dihydrate salt of pyridine/pyrrolidine alkaloid nicotine, qualifies as a heterocyclic nitrogen drug under HTS 2933.99.90.00. Used in smoking cessation therapies and imported as purified API.