Pyridine-3-Carboxylic Acid (Niacin)
Niacin, or vitamin B3, is a pyridine derivative used as an essential drug for treating pellagra and managing dyslipidemia. Classified under HTS 2933.39.41.00 due to its unfused pyridine ring and status as a pharmaceutical drug within Chapter 29. Bulk USP-grade niacin powder qualifies as a chemically defined heterocyclic compound.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used as vitamin B3 food fortificant
Food additive forms of niacin fall under vitamin provisions in heading 2936, taking precedence over drug classification.
If in tablet/capsule dosage form
Niacin supplements as finished medicaments are Chapter 30, not bulk chemical substances.
If esterified as niacinamide precursor
Niacin esters are classified with parent carboxylic acids per Chapter Note 5(A), but different oxygen function.
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Import Tips & Compliance
• Submit USP/NF Certificate of Analysis verifying ≥99% purity to maintain drug classification under Chapter 29
• Include pharmacological end-use documentation to distinguish from food-grade niacin classified elsewhere
• Avoid retail packaging; bulk drums only, as consumer packs shift to Chapter 30 medicaments
Related Products under HTS 2933.39.41.00
Nicotine Bitartrate Dihydrate
Nicotine bitartrate dihydrate is a heterocyclic compound containing a pyridine ring, used primarily as a drug in smoking cessation aids and nicotine replacement therapies. It falls under HTS 2933.39.41.00 as a drug featuring an unfused pyridine ring structure within Chapter 29's scope for chemically defined organic compounds. This classification applies to its pharmaceutical grade purity and medicinal application.
4-Aminopyridine
4-Aminopyridine is a pyridine derivative used as a potassium channel blocker in multiple sclerosis treatment (dalfampridine). It qualifies for HTS 2933.39.41.00 as a drug containing an unfused pyridine ring, meeting Chapter 29 criteria for nitrogen-heterocyclic compounds. Pharmaceutical grade material supports neurological therapeutic applications.
Pyridoxine Hydrochloride (Vitamin B6)
Pyridoxine HCl, a pyridine derivative, serves as the pharmaceutical form of vitamin B6 for treating deficiencies and nausea in pregnancy. Under HTS 2933.39.41.00 for its unfused pyridine ring and drug status per Chapter 29 scope. Bulk powder meets chemically defined compound requirements.
Isoniazid (Pyridine-4-Carboxylic Acid Hydrazide)
Isoniazid is a first-line antituberculosis drug featuring a pyridine carboxylic acid hydrazide structure. Classified in HTS 2933.39.41.00 as a drug with unfused pyridine ring under Chapter 29 heterocyclic provisions. Essential medicine status requires high purity bulk import form.
Ethionamide
Ethionamide, a thioamide derivative of pyridine-2-carboxylic acid, treats multidrug-resistant tuberculosis. Falls under HTS 2933.39.41.00 for its unfused pyridine ring and drug classification in Chapter 29. Bulk API form used in pharmaceutical manufacturing.
Metyrapone
Metyrapone, containing a methyl 1-(2-pyridyl)-1-propanone structure, inhibits cortisol synthesis in Cushing's syndrome treatment. HTS 2933.39.41.00 applies for its pyridine ring as a drug per Chapter 29 heterocyclic rules. Pharmaceutical bulk powder for API synthesis.