Mefenamic Acid
Mefenamic acid is an anthranilic acid derivative with sulfonamide-related structure used as NSAID for dysmenorrhea and arthritis. Though primarily carboxylic acid, its sulfonamide characteristics place it under HTS 2935.90.95.00 as 'Other' sulfonamides.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified by primary amino-acid function
Anthranilic acid derivatives often classify under carboxamide-acid headings.
If carboxylic acid function dominates
Chapter 29 prioritizes last occurring functional group heading.
Not sure which classification is right?
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Import Tips & Compliance
• Confirm sulfonamide moiety via FTIR; carboxylic acid function secondary
• Pain management API; monitor DEA precursor chemical list
• Light-sensitive; amber packaging documentation prevents degradation claims
Related Products under HTS 2935.90.95.00
Sulfisoxazole Diolamine
Sulfisoxazole diolamine is the diethanolamine salt of sulfisoxazole, used in ophthalmic and systemic antibacterial formulations. It qualifies for HTS 2935.90.95.00 as a salt of a sulfonamide antibiotic, classified with the parent sulfonamide per Chapter 29 salt classification rules.
Celecoxib API
Celecoxib is a COX-2 selective NSAID containing a sulfonamide group, used for arthritis treatment. Classified under HTS 2935.90.95.00 due to its pyrazole-sulfonamide structure qualifying as an 'Other' sulfonamide.
Sulfanilamide
Sulfanilamide is the parent compound of all sulfonamide antibiotics, historically significant for treating streptococcal infections. As the simplest sulfonamide not covered by prior specific subheadings, it classifies under HTS 2935.90.95.00.
Acetazolamide
Acetazolamide is a carbonic anhydrase inhibitor sulfonamide used for glaucoma, altitude sickness, and epilepsy. Its benzothiazole-sulfonamide structure places it in HTS 2935.90.95.00 as an 'Other' sulfonamide.
Furosemide
Furosemide is a loop diuretic containing a furfuryl-sulfonamide structure, used for edema and hypertension. Classified under HTS 2935.90.95.00 as a sulfonamide derivative despite primary diuretic function.
Sulfamethoxazole USP
Sulfamethoxazole is a synthetic bacteriostatic sulfonamide antibiotic used primarily in combination with trimethoprim for treating urinary tract infections and respiratory infections. It falls under HTS 2935.90.95.00 as a sulfonamide derivative other than those specifically named in prior subheadings, classified as a separate chemically defined organic compound per Chapter 29 note (a).