Sulfapyridine Base
Sulfapyridine is a historic sulfonamide antibiotic still used in dermatological treatments like dermatitis herpetiformis. Falls under HTS 2935.90.4800 as a chemically defined sulfonamide anti-infective agent per Chapter 29(a). Its continued pharmacological use maintains drug classification despite age.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pyridine ring considered primary heterocyclic structure
Sulfonamide function takes precedence over heterocyclic classification per numerical order rule.
If amide function emphasized over sulfonamide
Sulfonamides specifically provided for in 2935 supersede general amide headings.
If technical grade <95% purity for non-pharma use
Diagnostic or laboratory reagents classify separately from pharmaceutical grade.
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Import Tips & Compliance
• Provide current pharmacological literature confirming ongoing anti-infective indications to avoid 'other' classification
• Ensure GMP manufacturing certification; legacy drugs face heightened scrutiny for quality control
• Document absence of heavy metal impurities common in older synthesis routes
Related Products under HTS 2935.90.48.00
Sulfamethoxazole USP
Sulfamethoxazole is a synthetic bacteriostatic sulfonamide antibiotic used primarily as an anti-infective agent against gram-positive and gram-negative bacteria. It falls under HTS 2935.90.4800 as a sulfonamide classified as an anti-infective drug, typically used in combination therapies like co-trimoxazole. This chemically defined organic compound meets Chapter 29 note (a) for separate sulfonamides.
Sulfadiazine Sodium
Sulfadiazine sodium is a water-soluble salt form of the sulfonamide antibiotic sulfadiazine, used for treating toxoplasmosis and other bacterial infections. Classified under HTS 2935.90.4800 as a sulfonamide anti-infective drug per Chapter 29 note (C)(1) for inorganic salts of organic compounds. The sodium salt retains the sulfonamide therapeutic classification.
Sulfamethizole Powder
Sulfamethizole is a fast-acting sulfonamide specifically indicated for urinary tract infections. Classified under HTS 2935.90.4800 as a sulfonamide anti-infective drug meeting Chapter 29 requirements for separate chemically defined compounds. Typically imported as sterile powder for injection or oral suspension.
Sulfathiazole Sodium
Sulfathiazole sodium combines sulfonamide antibiotic with thiazole ring for broad-spectrum antibacterial activity. HTS 2935.90.4800 classification as sulfonamide anti-infective per Chapter 29 note (C)(1) for organic salts. Used historically in wound dressings and systemic infections.
Succinylsulfathiazole
Succinylsulfathiazole is a poorly absorbed sulfonamide designed for intestinal infections, releasing active sulfathiazole locally. Classified HTS 2935.90.4800 as sulfonamide anti-infective per Chapter 29 ester classification rules. Used in ulcerative colitis and bacillary dysentery treatment.
Phthalylsulfathiazole
Phthalylsulfathiazole (Talinol) provides poor absorption for localized intestinal antibacterial action against Shigella and E. coli. HTS 2935.90.4800 as sulfonamide anti-infective ester per Chapter 29 classification notes. Hydrolyzed in alkaline intestine to active form.