Pyridine-3-Carboxylic Acid (Niacin)
Niacin, or vitamin B3, is a pyridine derivative with a carboxylic acid substituent, featuring a single nitrogen hetero-atom in its aromatic ring. Falls under HTS 2933.99.82 as other aromatic nitrogen heterocycles. Essential nutrient used in supplements and pharmaceuticals.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by vitamin function
Vitamins may fall under heading 2936, but heterocyclic structure governs per chapter notes.
If in multivitamin tablet form
Dosage-form vitamins shift to Chapter 30 medicaments.
If benzoic acid derivatives
Material composition changes heading if pyridine ring not principal characteristic.
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Import Tips & Compliance
• Include USP certificates for food/pharma grade; structure declaration prevents misclassification as vitamin prep; check for country-specific quotas
Related Products under HTS 2933.99.82
Caffeine Anhydrous Powder
Caffeine is a purine alkaloid classified as a heterocyclic compound with nitrogen hetero-atoms only, specifically an aromatic xanthine derivative. This powder form falls under HTS 2933.99.82 as 'other' aromatic heterocyclic compounds with nitrogen hetero-atoms. It is commonly used in pharmaceuticals, energy drinks, and dietary supplements.
Theophylline Anhydrous
Theophylline is a methylxanthine derivative, an aromatic heterocyclic compound with only nitrogen hetero-atoms in its fused ring structure. Classified under HTS 2933.99.82 as other aromatic nitrogen heterocycles. Used primarily in bronchodilator medications and as a research chemical.
Nicotine Freebase Liquid
Nicotine is a pyridine-pyrrolidine alkaloid featuring two fused nitrogen-containing heterocyclic rings, qualifying as aromatic or modified aromatic under this subheading. HTS 2933.99.82 covers this as other nitrogen heterocycles not elsewhere specified. Used in vaping products and smoking cessation therapies.
Imidazole Powder
Imidazole is a five-membered aromatic heterocycle containing two nitrogen atoms, used as a building block in pharmaceuticals and antifungals. Classified in HTS 2933.99.82 as other aromatic nitrogen heterocyclic compounds. Common intermediate in API synthesis.
1-Methylimidazole
1-Methylimidazole is a modified aromatic imidazole derivative with a methyl substituent on one nitrogen atom. This nitrogen heterocyclic compound is imported under HTS 2933.99.82 as other aromatic or modified aromatic heterocycles. Used in ionic liquid synthesis and catalysis.
Pyrazole Pharmaceutical Intermediate
Pyrazole consists of a five-membered ring with two adjacent nitrogen atoms, classified as an aromatic nitrogen heterocycle under HTS 2933.99.82. Used extensively as a scaffold in drug discovery for anti-inflammatory and antiviral agents.