Other
Carboxyamide-function compounds; amide-function compounds of carbonic acid: > Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof: > Other: > Other: > Other
Duty Rate (from China)
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified 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.
Phthalimide
Phthalimide is a cyclic imide derived from phthalic anhydride, used in organic synthesis and as a precursor for anthranilic acid. Falls under HTS 2924.29.95.00 as a cyclic amide/imide derivative. Common intermediate in dye and pharmaceutical production.
Succinimide
Succinimide is a five-membered cyclic imide used in pharmaceutical synthesis and as a corrosion inhibitor. Classified under HTS 2924.29.95.00 as an 'other' cyclic amide/imide. Key intermediate for N-bromosuccinimide (NBS) brominating agent.
Glutarimide
Glutarimide features a six-membered cyclic imide ring used in synthesis of pharmaceuticals like thalidomide analogs. HTS 2924.29.95.00 covers it as an unspecified cyclic amide derivative. Research applications in anti-inflammatory drug development.
Maleimide
Maleimide contains a five-membered ring with a reactive double bond, used in polymer chemistry and bioconjugation. Falls under HTS 2924.29.95.00 as cyclic amide/imide. Essential for Michael addition reactions in materials science.
Barbituric Acid
Barbituric acid is a pyrimidine-trione cyclic amide used as intermediate for barbiturate sedatives. Classified in HTS 2924.29.95.00 as 'other' cyclic amide. Historical pharmaceutical precursor under DEA controls.
Hydantoin
Hydantoin is a five-membered heterocyclic cyclic amide used in pharmaceutical synthesis and personal care formulations. HTS 2924.29.95.00 applies as unspecified cyclic amide derivative. Key intermediate for anticonvulsants like phenytoin.
Allantoin
Allantoin is a cyclic urea derivative (diamide) used in cosmetics for skin soothing properties and wound healing. Falls under HTS 2924.29.95.00 as cyclic amide. Common in skincare creams at 0.5-2% concentration.
Methsuximide
Methsuximide is N-methylphenylsuccinimide, a cyclic imide anticonvulsant for petit mal seizures. Classified under HTS 2924.29.95.00 as 'other' cyclic amide derivative. Bulk API form for tablet manufacturing.
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.