Quinidine Sulfate
Quinidine sulfate is a cinchona alkaloid derivative containing a quinoline ring system, used primarily as an antiarrhythmic drug for treating heart rhythm disorders. It falls under HTS 2933.49.26.00 as a quinoline-based heterocyclic compound classified as a drug, not elsewhere specified. This pure chemical form is imported for pharmaceutical manufacturing or compounding.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as finished tablets or capsules
Completed pharmaceutical dosage forms shift to Chapter 30, regardless of active ingredient structure.
If lacking quinoline ring system
Other heterocyclic drugs without specific ring structures fall under the residual 'other' provision in 2933.99.
If personal medication import
Personal use medications may qualify for duty-free entry under personal effects provisions.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide certificates of analysis confirming purity and quinoline structure to avoid reclassification under Chapter 30 finished pharmaceuticals
• Ensure DEA registration if importing quantities subject to controlled substance regulations, as quinidine is a Schedule IV drug
• Label shipments clearly as 'pharmaceutical reference standard' to prevent customs confusion with finished dosage forms
Related Products under HTS 2933.49.26.00
Quinine Hydrochloride
Quinine hydrochloride, derived from cinchona bark, features a quinoline ring and serves as an antimalarial and muscle relaxant. Classified under HTS 2933.49.26.00 as a drug containing quinoline ring system, not further fused. Imported as bulk active pharmaceutical ingredient for tablet production.
Primaquine Phosphate
Primaquine phosphate is a synthetic 8-aminoquinoline antimalarial drug containing the requisite quinoline ring structure. It qualifies for HTS 2933.49.26.00 as a drug under the quinoline/isoquinoline compounds provision. Used in bulk form for global malaria eradication programs.
Mefloquine Hydrochloride
Mefloquine hydrochloride is a 4-quinoline methanol derivative used for malaria prophylaxis, featuring the required quinoline ring system. Falls under HTS 2933.49.26.00 as a specified drug. Bulk API imported for military and travel medicine applications.
Chloroquine Phosphate
Chloroquine phosphate, a 4-aminoquinoline, contains the quinoline ring system and functions as an antimalarial and anti-inflammatory drug. Classified under HTS 2933.49.26.00 as a quinoline drug. Bulk powder imported for hospital compounding pharmacies.
Hydroxychloroquine Sulfate
Hydroxychloroquine sulfate is a 4-aminoquinoline derivative with hydroxy substitution, retaining the quinoline ring structure for antimalarial and autoimmune treatment. HTS 2933.49.26.00 applies as a drug under quinoline compounds. Imported as API for generic drug production.
Pamaquine Base
Pamaquine (plasmoquine) is an 8-aminoquinoline antimalarial with quinoline ring system, historically significant in malaria treatment. Classifies under HTS 2933.49.26.00 as other quinoline drugs. Rare import for research and reference standards.