Other
Heterocyclic compounds with nitrogen hetero-atom(s) only: > Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure: > Malonylurea (Barbituric acid) and its salts: > Other
Duty Rate (from China)
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 2933.52.90.00
Phenobarbital Sodium
Phenobarbital sodium is the sodium salt of phenobarbital, a barbituric acid derivative containing a pyrimidine ring structure. It is classified under HTS 2933.52.9000 as 'other' malonylurea (barbituric acid) and its salts, distinct from specific barbiturates like those in 2933.52.10. This chemically defined heterocyclic compound fits chapter 29 note (a) for separate organic compounds.
Pentobarbital Sodium
Pentobarbital sodium, a short-acting barbituric acid salt with pyrimidine ring, used as veterinary anesthetic. Falls under HTS 2933.52.9000 as 'other' barbituric acid salts per chapter notes for chemically defined organic compounds with nitrogen heterocycles. Not covered by specific barbiturate subheadings.
Secobarbital Sodium
Secobarbital sodium is a barbituric acid derivative salt containing hydrogenated pyrimidine ring, used in sedative formulations. Classified in 2933.52.9000 as other malonylurea salts, qualifying under chapter notes for heterocyclic nitrogen compounds not specifically listed elsewhere.
Amobarbital Sodium
Amobarbital sodium, a long-acting barbituric acid salt with pyrimidine structure, used medically. HTS 2933.52.9000 covers this as 'other' barbiturates per hierarchy for nitrogen heterocyclic compounds containing pyrimidine rings.
Butabarbital Sodium
Butabarbital sodium is a barbituric acid derivative salt with nitrogen heteroatoms in pyrimidine ring. Fits HTS 2933.52.9000 as other malonylurea salts, adhering to chapter rules for classification in last numerical heading.
Talbutal
Talbutal, 5-allyl-5-(2-bromo-2-ethylbutyryl)barbituric acid, contains pyrimidine ring structure. Classified under 2933.52.9000 as other barbituric acid derivatives not specifically enumerated.
Vinbarbital
Vinbarbital, a barbituric acid derivative with vinyl substitution, features nitrogen heterocyclic pyrimidine ring. HTS 2933.52.9000 applies as 'other' malonylurea per chemical definition.
Barbituric Acid (pure)
Malonylurea, also known as barbituric acid, is the parent pyrimidine heterocyclic compound. Directly classifiable under HTS 2933.52.9000 as the base compound and its salts (excluding specifics).
Hexobarbital
Hexobarbital, 5-(1-cyclohexenyl)-1,5-dimethylbarbituric acid, contains pyrimidine ring. 'Other' classification under 2933.52.9000 for barbituric derivatives.
Probarbital
Probarbital is 5-ethyl-5-isopropylbarbituric acid with characteristic pyrimidine structure. Falls in HTS 2933.52.9000 as unspecified barbituric acid.