Acetazolamide
Acetazolamide is a carbonic anhydrase inhibitor used primarily as a diuretic and for glaucoma treatment, featuring an acyclic amide structure with a sulfonamide group. It falls under HTS 2924.19.80.00 as an acyclic amide derivative not specifically covered by other subheadings in 2924.19. This classification aligns with chapter notes for chemically defined organic compounds with amide functions.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| đ¨đłChina | 6.5% | +25.0% | 31.5% |
| đ˛đ˝Mexico | 6.5% | â | 6.5% |
| đ¨đŚCanada | 6.5% | â | 6.5% |
| đŠđŞGermany | 6.5% | â | 6.5% |
| đŻđľJapan | 6.5% | â | 6.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a sulfonamide derivative for pharmaceutical use
Sulfonamides with primary amine functions may shift to heading 2935 if the sulfonamide characteristic predominates over the amide function.
If when imported as a salt of an antibiotic precursor
Salts of specific amine-function compounds used in antibiotics fall under 2941 per chapter note on salts classification.
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Import Tips & Compliance
⢠Verify pharmaceutical-grade purity certificates and comply with FDA import requirements for drug substances
⢠Include chemical analysis reports confirming acyclic amide structure to avoid reclassification
⢠Avoid common pitfalls like improper labeling of salts, which must follow the parent amide classification per chapter notes
Related Products under HTS 2924.19.80.00
Lidocaine
Lidocaine is a local anesthetic containing an acyclic amide (diethylamino acetanilide) linkage essential to its pharmacological action. Classified under HTS 2924.19.80.00 as an 'other' acyclic amide derivative, it fits chapter 29 provisions for chemically defined compounds with carboxyamide functions not elsewhere specified.
Bupivacaine Hydrochloride
Bupivacaine hydrochloride is an amide-type local anesthetic with an acyclic carboxamide group, supplied as its hydrochloride salt. Under HTS 2924.19.80.00, the salt classifies with the parent acyclic amide per chapter note 3(C)(1), covering 'other' derivatives.
Mepivacaine
Mepivacaine, a piperidine-based aminoamide anesthetic, contains a key acyclic amide linkage. HTS 2924.19.80.00 covers this as an 'other' acyclic amide, prioritizing amide function over any heterocyclic elements per classification notes.
N,N-Diethylacetamide
N,N-Diethylacetamide is an acyclic tertiary amide used as a solvent and chemical intermediate. Classified in HTS 2924.19.80.00 for other acyclic amides and derivatives, fitting chapter 29's scope for chemically defined compounds.
Formamide
Formamide (HCONH2) is the simplest acyclic amide, used as a solvent and in organic synthesis. HTS 2924.19.80.00 captures it as an 'other' acyclic amide, excluded from more specific subheadings.
N-Methylacetamide
N-Methylacetamide is an acyclic secondary amide employed in peptide synthesis and as a solvent. It properly classifies under HTS 2924.19.80.00 for unspecified acyclic amide derivatives.