Phenobarbital Intermediate (5-Ethyl-5-phenylbarbituric Acid)
This barbituric acid derivative serves as key intermediate for phenobarbital synthesis, featuring ethyl and phenyl substitutions on the cyclic amide ring. HTS 2924.29.95.00 covers it as unspecified cyclic amide. DEA List I chemical.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pyrimidine classification predominates
Specific purine/pyrimidine pharmaceuticals in heading 2933.
If for sera/vaccine production
Immunological exclusions apply per chapter notes.
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Import Tips & Compliance
• DEA 222 form required; chemical import license; end-user verification mandatory
Related Products under HTS 2924.29.95.00
Diketopiperazine
Diketopiperazine is a cyclic amide formed by the condensation of two amino acids, featuring a six-membered ring with two amide groups. It falls under HTS 2924.29.95.00 as a cyclic amide derivative not specified elsewhere in the heading. Commonly used as a peptide synthesis intermediate in pharmaceutical manufacturing.
N-Acetylpiperazine
N-Acetylpiperazine is a cyclic amide derivative where an acetyl group is attached to the nitrogen of piperazine, a six-membered heterocyclic ring. Classified under HTS 2924.29.95.00 as an 'other' cyclic amide not covered by principal headings. Used as an intermediate in pharmaceutical synthesis for drugs like ofloxacin.
2-Pyrrolidone (Pyrrolidin-2-one)
2-Pyrrolidone is a five-membered cyclic amide (lactam) widely used as a solvent in polymer manufacturing and pharmaceutical formulations. It qualifies for HTS 2924.29.95.00 as a cyclic amide derivative outside principal named compounds. Known for its high boiling point and water miscibility.
Caprolactam
Caprolactam is a seven-membered ring lactam serving as the monomer for nylon-6 polymer production. It falls under HTS 2924.29.95.00 as an 'other' cyclic amide not principal-named. Global production exceeds millions of tons annually for synthetic fiber manufacturing.
N-Methylpyrrolidone (NMP)
N-Methyl-2-pyrrolidone (NMP) is an N-substituted cyclic amide used as a high-performance solvent in electronics, petrochemicals, and paint strippers. Classified in HTS 2924.29.95.00 as a cyclic amide derivative. Subject to EPA regulations due to reproductive toxicity concerns.
Ethosuximide
Ethosuximide is a cyclic amide derivative used as an anticonvulsant medication for absence seizures. It features a succinimide ring structure qualifying it for HTS 2924.29.95.00 as 'other' cyclic amide. Supplied as pharmaceutical API in bulk powder form.