Diphenhydramine Hydrochloride API
Diphenhydramine HCl, first-generation antihistamine with piperazine-like nitrogen heterocycle, falls under HTS 2933.99.90.00 as a drug. Widely imported for Benadryl production and motion sickness treatments.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If amino acid amide function predominant
Carboxamide oxygen function may classify earlier numerically.
If syrup or topical cream finished products
Retail OTC formulations in Chapter 30.
If perfume or flavoring grade rather than pharma
Aromatic chemicals for cosmetics excluded.
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Import Tips & Compliance
• Ensure USP <467> microbial limits testing certification
• Monitor for residual solvents per ICH Q3C
• Label with 'may impair driving' warnings per FDA
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.
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.
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.