Other

2933.32.00Piperidine and its salts

2933.33Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN), dipipanone (INN), fentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A, phencyclidine (INN) (PCP), phenoperidine (INN), pipradrol (INN), piritramide (INN), propiram (INN), remifentanil (INN) and trimeperidine (INN); salts thereof

2933.34Other fentanyls and their derivatives

2933.353-Quinuclidinol

2933.364-Anilino-N-phenethylpiperidine (ANPP)

2933.37N-Phenethyl-4-piperidone (NPP)

2933.39.00Other

Calculate exact duty for your shipment Not sure about classification? Ask the Tariff Assistant

Products classified under Tariff item 2933.3

2-Aminopyridine (CAS 109-06-8)

2-Aminopyridine is an aromatic amine derivative containing an unfused pyridine ring with an amino group at position 2. It is used as an intermediate in pharmaceutical synthesis. Despite the amino substitution, the pyridine ring remains the core structure, and Chapter 29 notes do not exclude it from heading 29.33.

2-Picoline (2-Methylpyridine) (CAS 109-06-8)

2-Picoline (2-Methylpyridine) is a liquid alkyl derivative of pyridine with a methyl group at position 2. It is used in agrochemical and pharmaceutical synthesis. The single methyl substitution does not alter the pyridine ring classification.

4-Dimethylaminopyridine (DMAP) (CAS 1122-58-3)

4-Dimethylaminopyridine (DMAP) is a nucleophilic catalyst used in esterification and acylation reactions. It features a pyridine ring with a dimethylamino substitution at position 4. The pyridine ring structure dictates classification under this heading.

Pyridine-3-carboxylic Acid (Nicotinic Acid) (CAS 59-67-6)

Nicotinic acid (pyridine-3-carboxylic acid) is a pyridine derivative with a carboxylic acid group at position 3. It is essential for human nutrition as vitamin B3 and used in pharmaceutical applications. The pyridine ring structure determines classification.

Pyridine (CAS 110-86-1)

Pyridine is a flammable, colorless liquid heterocyclic organic compound with the molecular formula C5H5N. It contains an unfused pyridine ring and serves as a basic solvent and reagent in organic synthesis for pharmaceuticals and agrochemicals.

Pyridine Hydrochloride (CAS 628-13-7)

Pyridine hydrochloride is the crystalline salt form of pyridine with hydrochloric acid. It is used as a catalyst and reagent in organic reactions. The pyridine ring structure meets Chapter 29 note requirements for classification.

Pyridine N-Oxide (CAS 694-59-7)

Pyridine N-oxide features the pyridine ring with an oxygen atom bonded to the nitrogen atom. It is used as an intermediate in organic synthesis. The N-oxide maintains pyridine ring classification per heading scope.

Pyridine Sulfate

Pyridine sulfate is the acidic salt formed from pyridine and sulfuric acid. It is used in analytical chemistry and as a reagent. Chapter 29 note (C)(1) requires classification with the organic pyridine base.

Pyridinium Dichromate (CAS 14019-34-6)

Pyridinium dichromate is an orange crystalline compound used as an oxidizing agent in organic synthesis. It is formed from pyridine and chromic acid. Chapter notes specify classification with the organic pyridine component.

1-(2-Methoxyethyl)piperidine

1-(2-Methoxyethyl)piperidine is an ether-substituted piperidine used as a synthetic intermediate. Its core piperidine ring structure qualifies it under tariff item 2933.32.00, as the subheading covers piperidine and its salts, including derivatives with substituents on the ring. It is a chemically defined organic compound.

1-Benzylpiperidine

1-Benzylpiperidine is an N-protected piperidine derivative used in medicinal chemistry. The unfused piperidine ring structure places it under tariff item 2933.32.00, as the subheading covers piperidine and its salts, including N-substituted derivatives. It is a chemically defined organic compound.

1-Methylpiperidine

1-Methylpiperidine is an N-alkylated derivative of piperidine, a saturated six-membered heterocyclic amine. It is used as a base in organic synthesis and as a solvent. It falls under tariff item 2933.32.00 as a piperidine derivative, covered by the subheading for piperidine and its salts.

3,5-Dimethylpiperidine

3,5-Dimethylpiperidine is a dialkylated piperidine derivative used in chiral ligand synthesis. As a simple substituted piperidine, it falls under tariff item 2933.32.00, which covers piperidine and its salts, including alkyl-substituted derivatives. It is a chemically defined organic compound.

4-Aminopiperidine Dihydrochloride

4-Aminopiperidine Dihydrochloride is a substituted piperidine salt used in the synthesis of pharmaceutical intermediates. It features the core piperidine ring structure and is a salt, so it falls under tariff item 2933.32.00, which covers piperidine and its salts. The amino group does not change the classification.

4-Phenylpiperidine Hydrochloride

4-Phenylpiperidine Hydrochloride is a key intermediate for opioid analgesics like pethidine. The core piperidine ring structure qualifies it for tariff item 2933.32.00 as a piperidine salt, despite the phenyl substituent. It is a chemically defined organic compound.

4-Piperidone Hydrochloride Monohydrate

4-Piperidone Hydrochloride Monohydrate is a cyclic ketone derivative of piperidine used in alkaloid synthesis. The piperidine ring structure dominates classification under tariff item 2933.32.00, as the subheading covers piperidine and its salts, including ketone derivatives. It is a chemically defined organic compound.

98% Pure Piperidine ACS Reagent Grade

98% Pure Piperidine ACS Reagent Grade is piperidine with a purity of 98% meeting American Chemical Society standards for laboratory use. The impurities do not alter its classification as piperidine under Chapter Note 1(a), which includes compounds 'whether or not containing impurities.' It is used in analytical chemistry and synthesis.

Deuterated Piperidine-d11

Deuterated Piperidine-d11 is piperidine in which all 11 hydrogen atoms are replaced by deuterium, an isotope of hydrogen. It is used primarily as a solvent or reference standard in NMR spectroscopy. Under Chapter Note 1(a), isotopically substituted organic compounds are classified as the same chemically defined compound as the non-deuterated form, so it falls under tariff item 2933.32.00.

Piperidine

Piperidine is a saturated six-membered heterocyclic amine with the formula C5H10NH, containing a nitrogen hetero-atom in the ring. It is a chemically defined organic compound used as a solvent, base, and intermediate in organic synthesis. It falls under tariff item 2933.32.00 as the base compound for piperidine and its salts.

Piperidine-1-Carboxylic Acid tert-Butyl Ester

Piperidine-1-carboxylic acid tert-butyl ester, commonly known as Boc-piperidine, is a protected form of piperidine used extensively in peptide synthesis. The tert-butyl ester group shields the nitrogen atom, allowing selective reactions elsewhere in the molecule. Under the Customs Tariff, esters of piperidine are classified with the parent compound, piperidine, in heading 29.33.

Piperidine-4-Carboxylic Acid

Piperidine-4-carboxylic acid, also known as isonipecotic acid, is a piperidine derivative with a carboxylic acid functional group at the 4-position. Despite the additional acid functionality, Chapter 29 notes direct classification with the heterocyclic compound, piperidine, as the ring structure determines the heading. It is used as an intermediate in pharmaceutical synthesis.

Piperidine for Rubber Accelerator Synthesis

Technical grade piperidine designated for rubber accelerator synthesis is piperidine used as an intermediate in producing accelerators like CBS. The intended end-use does not affect classification under tariff item 2933.32.00, as the product is still piperidine. It is a chemically defined organic compound.

Piperidine Hydrochloride

Piperidine Hydrochloride is the hydrochloride salt of piperidine (C5H10NH·HCl), commonly used in organic synthesis. Under Chapter Note 5(C)(1), inorganic salts of organic compounds are classified in the heading appropriate to the organic compound, so it falls under tariff item 2933.32.00.

Piperidine with Anti-Dusting Agent

Piperidine with Anti-Dusting Agent is piperidine treated with fumed silica to reduce dust during handling. Chapter Note 1(g) permits the addition of anti-dusting agents for safety reasons without changing the classification. This product remains piperidine under tariff item 2933.32.00.

Piperidinium Acetate Salt

Piperidinium Acetate Salt is the acetate salt of piperidine, used as a catalyst in organic reactions. Under Chapter Note 5(C)(2), salts formed between organic compounds are classified in the heading appropriate to the base or acid that occurs last in numerical order; piperidine (heading 29.33) comes after acetic acid (heading 29.15), so it falls under tariff item 2933.32.00.

Stabilized Piperidine with Antioxidant

Stabilized Piperidine with Antioxidant is industrial piperidine mixed with BHT antioxidant to prevent degradation during transport and storage. Chapter Note 1(f) allows stabilizers necessary for preservation without changing classification. It falls under tariff item 2933.32.00.

Alfentanil Hydrochloride USP

Alfentanil Hydrochloride is the hydrochloride salt of alfentanil, a synthetic opioid analgesic explicitly listed under tariff item 2933.33.00. It contains an unfused pyridine ring in its structure, qualifying it as a heterocyclic compound with nitrogen hetero-atoms. This product is used in brief surgical anesthesia procedures due to its short-acting properties.

Carfentanil Citrate

Carfentanil Citrate is the citrate salt of carfentanil, an extremely potent synthetic opioid listed under tariff item 2933.33.00. Its structure includes an unfused pyridine ring, classifying it as a nitrogen hetero-atom compound. This product is primarily used in veterinary medicine for immobilizing large animals.

Diphenoxylate Hydrochloride USP

Diphenoxylate Hydrochloride is the hydrochloride salt of diphenoxylate, a compound explicitly named under tariff item 2933.33.00. It features an unfused pyridine ring, making it a heterocyclic compound with nitrogen hetero-atoms. This product is used as an antidiarrheal agent in pharmaceutical formulations.

Fentanyl Citrate USP

Fentanyl Citrate is the citrate salt of fentanyl, a synthetic opioid agonist explicitly listed under tariff item 2933.33.00. Its structure contains an unfused pyridine ring, qualifying it as a nitrogen hetero-atom heterocyclic compound. This product is used in pharmaceutical formulations for pain management and anesthesia.

Ketobemidone Hydrochloride

Ketobemidone Hydrochloride is the hydrochloride salt of ketobemidone, a synthetic opioid analgesic named under tariff item 2933.33.00. It contains an unfused pyridine ring, classifying it as a heterocyclic compound with nitrogen hetero-atoms. This product is primarily used in certain international markets for pain relief.

Methylphenidate Hydrochloride USP

Methylphenidate Hydrochloride is the hydrochloride salt of methylphenidate, a compound explicitly listed under tariff item 2933.33.00. It features an unfused pyridine ring, making it a heterocyclic compound with nitrogen hetero-atoms. This product is used as a central nervous system stimulant for treating ADHD.

Pentazocine Lactate USP

Pentazocine Lactate is the lactate salt of pentazocine, a mixed opioid agonist-antagonist named under tariff item 2933.33.00. Its structure includes an unfused pyridine ring, qualifying it as a nitrogen hetero-atom heterocyclic compound. This product is used for moderate pain management.

Pethidine Hydrochloride BP

Pethidine Hydrochloride is the hydrochloride salt of pethidine (meperidine), a synthetic opioid analgesic explicitly listed under tariff item 2933.33.00. It contains an unfused pyridine ring, classifying it as a heterocyclic compound with nitrogen hetero-atoms. This product is used for moderate to severe pain relief.

Phencyclidine Hydrochloride (PCP HCl)

Phencyclidine Hydrochloride is the hydrochloride salt of phencyclidine (PCP), a compound explicitly listed under tariff item 2933.33.00. Its structure features an unfused pyridine ring, making it a heterocyclic compound with nitrogen hetero-atoms. This product is a Schedule II controlled substance with dissociative anesthetic properties.

Remifentanil Hydrochloride USP

Remifentanil Hydrochloride is the hydrochloride salt of remifentanil, an ultra-short-acting synthetic opioid named under tariff item 2933.33.00. It contains an unfused pyridine ring, qualifying it as a heterocyclic compound with nitrogen hetero-atoms. This product is used in surgical settings for anesthesia and pain management.

Acetylfentanyl

Acetylfentanyl is a synthetic opioid and a derivative of fentanyl, characterized by an acetyl group on the anilino nitrogen. Its structure contains a piperidine ring with a nitrogen hetero-atom, which falls under the scope of this tariff item for other fentanyls and their derivatives.

Alfentanil Hydrochloride

Alfentanil hydrochloride is the salt form of alfentanil, a short-acting synthetic opioid and fentanyl derivative. The piperidine ring with a nitrogen hetero-atom places it under this tariff item for other fentanyls and their derivatives.

Carfentanil

Carfentanil is a highly potent fentanyl analog used in veterinary medicine, featuring a 4-anilinopiperidine core. Its piperidine nitrogen hetero-atom qualifies it as a fentanyl derivative under this tariff item.

Cyclopropylfentanyl

Cyclopropylfentanyl is a fentanyl derivative with a cyclopropyl group on the amide, retaining the core piperidine nitrogen hetero-atom. This structure falls under the tariff item for other fentanyls and their derivatives.

Fentanyl Citrate

Fentanyl citrate is the citrate salt of fentanyl, a synthetic opioid analgesic with a 4-anilino-N-phenethylpiperidine structure. The piperidine nitrogen hetero-atom places it under this tariff item for other fentanyls and their derivatives.

Furanylfentanyl

Furanylfentanyl is a fentanyl derivative with a furan ring substitution on the piperidine structure. The nitrogen hetero-atom in the piperidine ring qualifies it as an other fentanyl derivative under this tariff item.

Lofentanil

Lofentanil is a potent fentanyl derivative opioid with a piperidine nitrogen hetero-ring. Its structure aligns with the scope of this tariff item for other fentanyls and their derivatives.

Remifentanil Hydrochloride

Remifentanil hydrochloride is an ultra-short-acting opioid and fentanyl derivative with a piperidine ring and ester oxygen functions. The nitrogen hetero-atom in the piperidine ring places it under this tariff item for other fentanyls and their derivatives.

Sufentanil Base

Sufentanil base is a potent fentanyl derivative with a thiophene-substituted piperidine ring system. The nitrogen hetero-atom in the piperidine ring qualifies it as an other fentanyl derivative under this tariff item.

3-Hydroxyquinuclidine

3-Hydroxyquinuclidine, also known as 3-quinuclidinol, is a bicyclic alcohol containing a nitrogen hetero-atom in a hydrogenated pyridine ring. It is a separate chemically defined organic compound and falls under tariff item 2933.35.00 as the specified compound.

3-Quinuclidinol

3-Quinuclidinol is a bicyclic heterocyclic alcohol with a nitrogen hetero-atom and a hydrogenated pyridine ring. It is a separate chemically defined organic compound, classifiable under tariff item 2933.35.00 as the named compound.

3-Quinuclidinol Hydrochloride

3-Quinuclidinol hydrochloride is the salt of 3-quinuclidinol, formed with hydrochloric acid. Per Chapter 29 Note 5(C)(1), inorganic salts of organic compounds are classified with the organic compound, so it falls under tariff item 2933.35.00.

(R)-3-Quinuclidinol

(R)-3-Quinuclidinol is the enantiomerically pure R-form of 3-quinuclidinol, a bicyclic alcohol with a nitrogen hetero-atom. As a stereoisomer of the named compound, it is classified under tariff item 2933.35.00.

(S)-3-Quinuclidinol

(S)-3-Quinuclidinol is the S-enantiomer of 3-quinuclidinol, a bicyclic alcohol with a nitrogen hetero-atom. As a stereoisomer of the named compound, it is classifiable under tariff item 2933.35.00.

4-Anilino-N-phenethylpiperidine (ANPP) Pure Compound

4-Anilino-N-phenethylpiperidine (ANPP) is a synthetic organic compound with an unfused piperidine ring (a hydrogenated pyridine ring) containing a nitrogen hetero-atom. It is specifically named in tariff item 2933.36.00 and is classified here because it falls under the heading for heterocyclic compounds with nitrogen hetero-atom(s) only.

ANPP Dissolved in Safety Solvent

ANPP dissolved in a solvent is classifiable under tariff item 2933.36.00 when the solvent is added solely for safety or transport reasons and does not make the product suitable for a specific use. This aligns with Chapter 29 Note 1(e), which allows such solutions to retain their classification as the pure compound.

ANPP Pharmaceutical Intermediate Powder

ANPP pharmaceutical intermediate powder is a high-purity form of 4-anilino-N-phenethylpiperidine used as a key intermediate in synthesizing opioid analgesics. It falls under tariff item 2933.36.00 because it is the specific compound named in the tariff item, regardless of its intended use as an intermediate.

ANPP with Anti-Dusting Agent

ANPP with an anti-dusting agent is classifiable under tariff item 2933.36.00 when the additive is used for safety or identification and does not make the product suitable for a specific use. This is consistent with Chapter 29 Note 1(g), which permits such additions without changing the classification.

ANPP with Stabilizer for Transport

ANPP with a stabilizer for transport is classifiable under tariff item 2933.36.00 when the stabilizer is necessary for preservation or transport and does not alter the product's general use. This follows Chapter 29 Note 1(f), which allows such additions while maintaining the classification of the core compound.

High-Purity ANPP for API Synthesis

High-purity ANPP (≥99%) for API synthesis is the specific compound 4-anilino-N-phenethylpiperidine, classified under tariff item 2933.36.00. Its high purity and use as an API precursor do not affect its classification, as the tariff item names the compound directly.