Phenobarbital
Phenobarbital, a barbituric acid derivative, contains a pyrimidine ring with two nitrogen hetero-atoms, functioning as both anticonvulsant and sedative. Falls under HTS 2933.99.65.00 as an aromatic heterocyclic CNS drug. Long-acting barbiturate API imported in crystalline powder form.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as barbituric acid derivative
Specific barbituric acid heading precedes general CNS drugs.
If in mixed antibiotic formulations
Combination drugs shift to Chapter 30 medicaments.
If for laboratory diagnostic reagents
End-use as lab reagent changes from pharmaceutical classification.
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Import Tips & Compliance
• Schedule IV controlled substance; requires FDA 503B registration for bulk compounding
• Provide pKa and solubility data confirming barbituric acid structure
• Declare as 'not for injection' if powder form to avoid sterile product requirements
Related Products under HTS 2933.99.65.00
Diazepam (Valium)
Diazepam is a benzodiazepine derivative classified as a sedative and hypnotic, featuring a fused benzene and diazepine ring system with nitrogen hetero-atoms. It falls under HTS 2933.99.65.00 as an aromatic heterocyclic compound primarily used for its central nervous system effects as an anticonvulsant, hypnotic, and sedative. This pure chemical form is imported for pharmaceutical manufacturing.
Clonazepam (Klonopin)
Clonazepam is a nitrobenzodiazepine anticonvulsant and sedative with a 1,4-benzodiazepine ring containing two nitrogen hetero-atoms. Classified under HTS 2933.99.65.00 for its primary CNS effects including anti-epileptic and hypnotic properties. Imported as active pharmaceutical ingredient (API) powder.
Lorazepam (Ativan)
Lorazepam, a 2-chloro-1,4-benzodiazepine, acts as an intermediate-acting sedative-hypnotic and anticonvulsant with nitrogen-containing heterocyclic rings. Falls under HTS 2933.99.65.00 as an aromatic drug primarily affecting the CNS. Bulk API imported for tablet/capsule production.
Zolpidem Tartrate
Zolpidem, an imidazopyridine hypnotic, features a bicyclic nitrogen-heterocyclic structure modified with aromatic rings. Classified in HTS 2933.99.65.00 as a sedative primarily affecting CNS via GABA receptor modulation. Imported as tartrate salt API for immediate-release tablets.
Alprazolam (Xanax)
Alprazolam, a triazolobenzodiazepine, features a fused 1,2,4-triazole and 1,4-diazepine ring system with multiple nitrogen hetero-atoms. HTS 2933.99.65.00 classification for its anxiolytic, sedative, and anticonvulsant properties. High-potency API imported for oral dosage forms.
Zaleplon
Zaleplon, a pyrazolopyrimidine hypnotic, contains fused five- and six-membered nitrogen heterocyclic rings with sedative CNS effects. Classified under HTS 2933.99.65.00 as modified aromatic drug for sleep induction. Ultra-short acting non-benzodiazepine API.