Sulfapyridine Base API
Sulfapyridine is a foundational sulfonamide antibiotic specifically named in HTS 2935.90.4200, used in dermatological treatments and as a component of dapsone metabolism studies. This base form (non-salt) bulk API perfectly matches Chapter 29 criteria for separate chemically defined anti-infective drugs. Imported primarily for pharmaceutical manufacturing and research.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for salts of sulfapyridine rather than free base
Different statistical suffixes apply to sulfonamide salts vs free base forms even within same heading
If when incorporated into beauty/preparatory skin treatment creams
Topical sulfonamide preparations exceeding medicinal concentration classified as cosmetics in Chapter 33
If diagnostic reagent rather than therapeutic drug
Chapter 29 excludes diagnostic reagents; lab diagnostic chemicals classified in Chapter 38
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Import Tips & Compliance
• Maintain cold chain documentation if shipped as hygroscopic base form to prevent degradation during transit
• Include synthetic route information and residual solvent analysis per ICH guidelines for API validation
Related Products under HTS 2935.90.42.00
Sulfasalazine USP Powder
Sulfasalazine is a sulfonamide antibiotic chemically known as salicylazosulfapyridine, used primarily for treating ulcerative colitis and rheumatoid arthritis. This USP-grade powder form falls under HTS 2935.90.4200 as it is specifically listed as an anti-infective agent within the sulfonamides category of Chapter 29. It is supplied as a bulk pharmaceutical intermediate for compounding into tablets or suspensions.
Sulfamerazine EP Standard
Sulfamerazine, a short-acting sulfonamide antibiotic explicitly listed in HTS 2935.90.4200, meets European Pharmacopoeia standards for purity. Used in combination therapies for urinary tract infections, this bulk API represents a classic Chapter 29 sulfonamide classification. The product qualifies due to its specific chemical definition and anti-infective drug application.
Pharmaceutical Sulfamerazine Granules
Sulfamerazine granules represent the enumerated sulfonamide in micronized form for improved bioavailability, classified under HTS 2935.90.4200. These pharmaceutical granules maintain chemical identity as separate organic compounds per Chapter 29 note 2(a). Used in compounding oral suspensions for pediatric infections.
Sulfadiazine Sodium Bulk API
Sulfadiazine sodium is a water-soluble salt form of the sulfonamide antibiotic sulfadiazine, listed specifically under HTS 2935.90.4200. Used in toxoplasmosis treatment and burn wound prophylaxis, this bulk active pharmaceutical ingredient (API) qualifies as a Chapter 29 sulfonamide drug. The sodium salt classification follows Chapter Note 5(C)(1) placing it with the parent organic compound.
Sulfaguanidine Pharmaceutical Grade
Sulfaguanidine is a sulfonamide specifically enumerated in HTS 2935.90.4200, historically used for gastrointestinal bacterial infections. This pharmaceutical-grade powder meets Chapter 29 requirements for separate chemically defined organic compounds used as anti-infective drugs. Primarily imported as bulk API for veterinary and niche human applications.
Sulfadiazine Silver Pharmaceutical
Silver sulfadiazine, while typically considered a coordination compound, derives classification from its parent sulfonamide sulfadiazine per Chapter 29 note 5(C)(3). Specifically enumerated under HTS 2935.90.4200 through its sulfadiazine component, used exclusively for burn wound cream formulations. Bulk powder imported for compounding into topical antimicrobial creams.