Other

2933.53.00Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof

2933.54.00Other derivatives of malonylurea (barbituric acid); salts thereof

2933.55.00Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof

2933.59.00Other

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Products classified under Tariff item 2933.5

5,5-Diethylbarbituric Acid Intermediate

Pure barbituric acid used as an intermediate for synthesizing 5,5-diethylbarbituric acid (barbital). It is a separate chemically defined organic compound with a pyrimidine ring, falling under tariff item 2933.52.00 as malonylurea (barbituric acid) and its salts.

Amobarbital Sodium

Amobarbital sodium is the sodium salt of amobarbital, a long-acting barbituric acid derivative with a pyrimidine ring structure. It is used medically as a sedative or hypnotic. As a salt of malonylurea (barbituric acid), it falls under tariff item 2933.52.00, which covers such compounds with a pyrimidine ring.

Barbituric Acid

Barbituric acid (malonylurea) is a heterocyclic compound with a pyrimidine ring, serving as the core scaffold for barbiturate pharmaceuticals. It is a separate chemically defined organic compound, classifiable under tariff item 2933.52.00.

Barbituric Acid Aqueous Solution

Barbituric acid dissolved in water, as permitted by Chapter 29 note (d). The aqueous solution is a normal method of putting up for safety or transport, and the solvent does not render it suitable for specific use, so it remains classifiable under tariff item 2933.52.00.

Barbituric Acid (pure)

Malonylurea, also known as barbituric acid, is the parent pyrimidine heterocyclic compound. It is directly classifiable under tariff item 2933.52.00 as the base compound and its salts, per the tariff description.

Barbituric Acid Technical Grade

Technical grade malonylurea (90-95% purity) for industrial synthesis of pharmaceutical intermediates and agrochemicals. Despite lower purity, it qualifies as a separate chemically defined compound under Chapter 29 note (a), classifiable under tariff item 2933.52.00.

Barbituric Acid with Stabilizer

Barbituric acid containing an added stabilizer necessary for preservation during transport, as permitted by Chapter 29 note (f). The stabilizer does not render it suitable for specific use, so it remains classifiable under tariff item 2933.52.00.

Butabarbital Sodium

Butabarbital sodium is the sodium salt of butabarbital, a barbituric acid derivative with a pyrimidine ring. It is used as a short-to-intermediate acting sedative. As a salt of malonylurea, it is classified under tariff item 2933.52.00.

Hexobarbital

Hexobarbital is a barbituric acid derivative with a pyrimidine ring, specifically 5-(1-cyclohexenyl)-1,5-dimethylbarbituric acid. It is used as a short-acting hypnotic or anesthetic. As a malonylurea compound, it falls under tariff item 2933.52.00.

Laboratory Reagent Barbituric Acid

ACS reagent grade barbituric acid for analytical chemistry and organic synthesis in research laboratories. Supplied as white crystalline powder with specified purity, it is a separate chemically defined compound under tariff item 2933.52.00.

Pentobarbital Sodium

Pentobarbital sodium is the sodium salt of pentobarbital, a short-acting barbituric acid derivative with a pyrimidine ring. It is used as a veterinary anesthetic and sedative. As a salt of malonylurea, it is classified under tariff item 2933.52.00.

Pharmaceutical Grade Barbituric Acid Powder

High-purity barbituric acid powder (≥99%) manufactured specifically for use in API synthesis of barbiturate sedatives and anticonvulsants. Meets USP/EP pharmacopeia standards and is classifiable under tariff item 2933.52.00 as malonylurea.

Phenobarbital Sodium

Phenobarbital sodium is the sodium salt of phenobarbital, a barbituric acid derivative containing a pyrimidine ring. It is used as an anticonvulsant and sedative. As a salt of malonylurea, it falls under tariff item 2933.52.00.

Probarbital

Probarbital is 5-ethyl-5-isopropylbarbituric acid, a barbituric acid derivative with a pyrimidine ring. It is used as a sedative or hypnotic. As a malonylurea compound, it is classified under tariff item 2933.52.00.

Research Quantity Barbituric Acid

Small quantity barbituric acid packaged for research institutions and university laboratories. Despite small packaging, it qualifies as a separate chemically defined compound under tariff item 2933.52.00, not a retail consumer product.

Secobarbital Sodium

Secobarbital sodium is the sodium salt of secobarbital, a barbituric acid derivative with a hydrogenated pyrimidine ring. It is used as a sedative and hypnotic. As a salt of malonylurea, it falls under tariff item 2933.52.00.

Talbutal

Talbutal is 5-allyl-5-(2-bromo-2-ethylbutyryl)barbituric acid, a barbituric acid derivative with a pyrimidine ring. It is used as a sedative. As a malonylurea compound, it is classified under tariff item 2933.52.00.

Vinbarbital

Vinbarbital is a barbituric acid derivative with a vinyl substitution and a pyrimidine ring. It is used as a sedative or hypnotic. As a malonylurea compound, it falls under tariff item 2933.52.00.

Amobarbital USP Powder

Amobarbital USP powder is an intermediate-acting barbiturate with a pyrimidine ring, used as a sedative and hypnotic. It is explicitly named in tariff item 2933.53.00, which covers amobarbital (INN) and its salts. Imported as a USP-grade powder for pharmaceutical manufacturing, it meets the chapter's definition of a separate chemically defined organic compound.

Barbital Sodium Crystals

Barbital sodium crystals are the sodium salt of barbital, a barbiturate with a pyrimidine ring, explicitly listed in tariff item 2933.53.00. Used in research and legacy pharmaceutical formulations, this crystalline powder is a separate chemically defined organic compound. The salt form is covered by the tariff item's inclusion of salts of barbital.

Butalbital Pharmaceutical Grade

Butalbital pharmaceutical grade is a barbiturate with a pyrimidine ring, explicitly named in tariff item 2933.53.00. It is used in combination products for tension headaches, such as with acetaminophen and caffeine. Imported in bulk for pharmaceutical manufacturing, it qualifies as a separate chemically defined organic compound.

Pentobarbital Free Acid Form

Pentobarbital free acid form is a barbiturate with a pyrimidine ring, explicitly listed in tariff item 2933.53.00 as pentobarbital (INN). It is used as an intermediate in the synthesis of injectable formulations. As a separate chemically defined organic compound, it falls under Chapter 29.

Pentobarbital Sodium USP Grade

Pentobarbital sodium USP grade is the sodium salt of pentobarbital, a short-acting barbiturate with a pyrimidine ring, explicitly covered in tariff item 2933.53.00. It is used for anesthesia and euthanasia in veterinary and medical settings. The salt is included in the tariff item's scope as a salt of pentobarbital.

Phenobarbital Sodium Powder

Phenobarbital sodium powder is the sodium salt of phenobarbital, a barbiturate with a pyrimidine ring, explicitly listed in tariff item 2933.53.00. It is used primarily as an anticonvulsant and sedative. The salt form is covered by the tariff item's inclusion of salts of phenobarbital.

Secobarbital Sodium Bulk API

Secobarbital sodium bulk API is a short-acting hypnotic barbiturate salt with a pyrimidine ring, explicitly named in tariff item 2933.53.00. It is used in pharmaceutical manufacturing for sleep induction medications. As a pure salt, it qualifies as a separate chemically defined organic compound under Chapter 29.

Amobarbital USP

Amobarbital is a long-acting barbituric acid derivative used for sedation and hypnosis. It contains the pyrimidine ring structure characteristic of malonylurea derivatives, qualifying it for classification under tariff item 2933.54.00.

Barbital (Barbitone)

Barbital, also known as barbitone, is the diethyl derivative of barbituric acid and a classic sedative. As a malonylurea derivative with a pyrimidine ring, it is correctly classified under tariff item 2933.54.00.

Butabarbital Sodium

Butabarbital sodium is the sodium salt of a barbituric acid derivative used in sedative formulations. As a salt of a malonylurea derivative, it falls under tariff item 2933.54.00 per Chapter 29 classification rules for salts of organic compounds.

Hexobarbital

Hexobarbital is a short-acting barbiturate used in research and historically in medicine. Its structure is based on malonylurea with a pyrimidine ring, making it classifiable under tariff item 2933.54.00.

Pentobarbital Sodium USP

Pentobarbital sodium is a short-acting barbiturate salt used in veterinary euthanasia and medical sedation. As a salt of a barbituric acid derivative, it is classified under tariff item 2933.54.00.

Phenobarbital Sodium Powder

Phenobarbital sodium is the sodium salt of phenobarbital, used in injectable formulations and as an intermediate in pharmaceutical manufacturing. It is a salt of a barbituric acid derivative, classifying under tariff item 2933.54.00.

Phenobarbital USP

Phenobarbital is a barbituric acid derivative used as an anticonvulsant and sedative. It is a derivative of malonylurea with a pyrimidine ring, falling under tariff item 2933.54.00.

Secobarbital USP

Secobarbital is a barbituric acid derivative used as a short-acting sedative-hypnotic. It contains the pyrimidine ring structure of malonylurea derivatives, classifying under tariff item 2933.54.00.

Thiopental Sodium

Thiopental sodium is a thiobarbiturate used as an intravenous anesthetic. The sulfur substitution in the molecule does not remove it from the malonylurea derivative class, so it falls under tariff item 2933.54.00.

Vinbarbital

Vinbarbital is a methylated barbituric acid derivative with sedative properties. Its pyrimidine ring and malonylurea core make it classifiable under tariff item 2933.54.00.

Loprazolam Base

Loprazolam base is a chemically defined organic compound with a pyrimidine ring in its structure, listed by name (INN) under tariff item 2933.55.00. It is a hypnotic agent used primarily as a reference standard or in pharmaceutical research. The compound contains only nitrogen hetero-atoms in its ring system, consistent with Chapter 29 notes.

Loprazolam Ethanesulfonate

Loprazolam ethanesulfonate is a salt of loprazolam (INN), a pyrimidine-containing heterocyclic compound. Under Chapter 29, salts of named organic compounds are classified with the parent compound. The salt retains the nitrogen hetero-atom ring structure and is covered by the 'salts thereof' provision of tariff item 2933.55.00.

Mecloqualone Free Base

Mecloqualone free base is a chemically defined compound with a pyrimidine ring, listed by name (INN) under tariff item 2933.55.00. It is a sedative used as a reference standard in analytical testing. The compound has only nitrogen hetero-atoms in its ring structure, consistent with Chapter 29 classification.

Mecloqualone Mesylate Salt

Mecloqualone mesylate is a salt of mecloqualone (INN), a pyrimidine-containing heterocyclic compound. Chapter 29 notes state that salts of organic compounds are classified with the parent compound. The mesylate salt is covered by the 'salts thereof' provision of tariff item 2933.55.00.

Methaqualone Base (Pure)

Methaqualone base is a chemically defined organic compound with a fused pyrimidine ring, listed by name (INN) under tariff item 2933.55.00. It is a synthetic sedative used primarily as a reference standard. The compound contains only nitrogen hetero-atoms in its ring structure, meeting Chapter 29 requirements.

Methaqualone Hydrochloride

Methaqualone hydrochloride is the salt form of methaqualone (INN), a pyrimidine-containing heterocyclic compound. Under Chapter 29, salts of named compounds are classified with the parent compound. The hydrochloride salt is covered by the 'salts thereof' provision of tariff item 2933.55.00.

Methaqualone Phosphate

Methaqualone phosphate is a stable salt of methaqualone (INN), a pyrimidine-containing heterocyclic compound. Chapter 29 notes classify salts of named organic compounds with the parent compound. The phosphate salt is covered by the 'salts thereof' provision of tariff item 2933.55.00.

Methaqualone Sulfate

Methaqualone sulfate is a salt of methaqualone (INN), a pyrimidine-containing heterocyclic compound. Under Chapter 29, salts of named organic compounds are classified with the parent compound. The sulfate salt is covered by the 'salts thereof' provision of tariff item 2933.55.00.

Zipeprol Dihydrochloride

Zipeprol dihydrochloride is the di-salt form of zipeprol (INN), an antitussive agent with a piperazine ring in its structure. Tariff item 2933.55.00 covers zipeprol (INN) and its salts. The compound contains only nitrogen hetero-atoms, consistent with Chapter 29 classification.

Zipeprol Hydrochloride

Zipeprol hydrochloride is a salt of zipeprol (INN), an antitussive agent with a piperazine ring. Tariff item 2933.55.00 covers zipeprol (INN) and its salts. The compound contains only nitrogen hetero-atoms in its ring structure, meeting Chapter 29 requirements.

Atrazine

Atrazine is a chlorinated triazine herbicide containing a pyrimidine ring structure, used primarily for pre-emergent control of broadleaf and grassy weeds in crops like corn and sorghum. It is a separate chemically defined organic compound with nitrogen hetero-atoms, falling under tariff item 2933.59.00 as 'Other' heterocyclic compounds.

Atrazine Herbicide

Atrazine is a chlorinated triazine herbicide containing a heterocyclic nitrogen ring structure, used primarily for pre-emergent control of broadleaf and grassy weeds in corn and sorghum crops. It is a separate chemically defined organic compound with a pyrimidine ring in its structure, falling under tariff item 2933.59.00 as 'Other' heterocyclic compounds with nitrogen hetero-atom(s) only.

Bromacil

Bromacil is a uracil herbicide with a pyrimidine ring structure, controlling weeds in citrus groves and non-crop areas via soil persistence. It is a separate chemically defined organic compound with nitrogen hetero-atoms, qualifying under tariff item 2933.59.00 as 'Other' heterocyclic compounds.

Bromacil Brush Killer

Bromacil is a uracil herbicide with a pyrimidine ring structure, controlling tough brush and weeds in non-crop areas and citrus groves. It is a separate chemically defined organic compound with a nitrogen hetero-atom ring, qualifying under tariff item 2933.59.00 as 'Other' heterocyclic compounds.

Brompheniramine Maleate

Brompheniramine maleate is an antihistamine used to treat allergic rhinitis and nausea. This aromatic propylamine derivative with pyrimidine affinity is a chemically pure drug, classified under tariff item 2933.59.00 for heterocyclic compounds with nitrogen hetero-atoms.

Buclizine Hydrochloride

Buclizine hydrochloride is a piperazine antihistamine used to treat nausea, vomiting, and motion sickness. Its aromatic heterocyclic structure containing a piperazine ring qualifies it under tariff item 2933.59.00.

Bulk Trimethoprim Base Crystals

Bulk trimethoprim base crystals are a pure free base form of trimethoprim, an antibiotic used in pharmaceutical compounding. Its structure contains a pyrimidine ring, classifying it under tariff item 2933.59.00 for heterocyclic compounds with nitrogen hetero-atoms. The product is a separate chemically defined organic compound, meeting Chapter 29 criteria.

Bupirimate Technical Powder

Bupirimate is a pyrimidine-based fungicide that protects pome fruits and vegetables from powdery mildew. Imported as a technical powder for formulation, it is a separate chemically defined organic compound with a pyrimidine ring, falling under tariff item 2933.59.00 as 'Other' heterocyclic compounds.

Chlorpheniramine Maleate

Chlorpheniramine maleate is an alkylamine antihistamine with a modified aromatic structure used for allergies and sometimes nausea. Imported as a chemically pure drug, it qualifies under tariff item 2933.59.00 for heterocyclic compounds with nitrogen hetero-atoms.

Clemastine Fumarate

Clemastine fumarate is a second-generation antihistamine with anti-nauseant applications in allergy treatment. This modified aromatic heterocyclic structure fits tariff item 2933.59.00 for drugs with nitrogen hetero-atoms.

Cyclizine Hydrochloride

Cyclizine hydrochloride is a piperazine-based antihistamine used mainly for preventing motion sickness and treating vertigo and nausea. Its heterocyclic structure with a piperazine ring qualifies it under tariff item 2933.59.00.

Cyprodinil Technical Material

Cyprodinil technical material is a broad-spectrum fungicide containing a pyrimidine ring, used to control diseases in grapes, apples, and cereals. It is a separate chemically defined organic compound, qualifying under tariff item 2933.59.00 for heterocyclic compounds with nitrogen hetero-atoms.