HTS US: 2933.XX.XXXX
Description
This heading encompasses heterocyclic chemical compounds that contain nitrogen hetero-atoms exclusively within their rings. These compounds cover a broad range of substances including pharmaceuticals, pesticides, photographic chemicals, and other specialized industrial chemicals.
The classification includes well-known pharmaceutical agents such as antipyrine derivatives, barbiturates, benzodiazepines, and fentanyls, as well as important chemical intermediates like hydantoin, pyridine, piperidine, and lactams. The compounds may be present as free bases, salts, or derivatives.
Code Hierarchy
- Section VI: Products of the Chemical or Allied Industries (Chapters 28-38)
- Chapter 29: Organic Chemicals
- Heading 2933: Heterocyclic compounds with nitrogen hetero-atom(s) only.
- US HTS Code (10-digit):
2933.XX.XXXX– The final digits specify the exact compound or group of compounds.
Detailed Breakdown of Subheadings
The heading 2933 is subdivided into numerous detailed 6-digit and 10-digit codes based on the chemical nature and application of the compounds:
| HS/HTS Code | Description | Examples & Notes |
|---|---|---|
| 2933.11.00.00 | Phenazone (Antipyrine) and its derivatives | Widely used analgesics and antipyretics class. |
| 2933.19.00.00 | Other compounds related to pyrazolone derivatives and related substances | Includes various pyrazolone derivatives with pharmaceutical and industrial uses. |
| 2933.19.04.00 | Aminomethylphenylpyrazole and 3-Methyl-1-(p-tolyl)-2-pyrazolin-5-one | Specific pyrazole derivatives used in chemical synthesis. |
| 2933.19.08.00 | Various substituted pyrazolones and sulfonic acid derivatives | Includes amino- and chloro-substituted pyrazolones with pharmaceutical relevance. |
| 2933.19.15.00 | Difenzoquat methyl sulfate | Used as a quaternary ammonium compound in agriculture. |
| 2933.19.18.00 | Chlorinated and sulfophenyl pyrazolones and related compounds | Includes sulfonated derivatives applied in pharmaceuticals and agrochemicals. |
| 2933.19.23.00 | Pesticides | Pyrazolone-based pesticides for agricultural use. |
| 2933.19.30.00 | Photographic chemicals | Couplers and other chemicals used in color photographic paper processing. |
| 2933.19.30.10 | Couplers for color negative photographic paper | Essential components in photographic film development. |
| 2933.19.35.00 | Drugs | Pharmaceutical compounds derived from pyrazolones. |
| 2933.21.00.00 | Hydantoin and its derivatives | Important in anticonvulsant and dermatological applications. |
| 2933.29.00.00 | Other nitrogen heterocyclic compounds | Includes imidazole derivatives and similar compounds. |
| 2933.29.05.00 | Triflumizole and Ethylene thiourea | Fungicides and chemical intermediates. |
| 2933.29.10.00 | 2-Phenylimidazole | Used in chemical synthesis and as pharmaceutical intermediates. |
| 2933.29.20.00 | Drugs | Pharmaceutical active substances within the imidazole class. |
| 2933.31.00.00 | Pyridine and its salts | Basic heterocyclic compound widely used as a solvent and reagent. |
| 2933.32.10.00 | Piperidine | Precursor to many pharmaceuticals and agrochemicals. |
| 2933.33.01.00 | Selected opioids and related substances (e.g., fentanyl, pethidine) | Controlled substances used medically as analgesics. |
| 2933.34.00.00 | Other fentanyls and derivatives | Related synthetic opioids. |
| 2933.35.00.00 | 3-Quinuclidinol | Intermediate in pharmaceutical synthesis. |
| 2933.36.00.00 | 4-Anilino-N-phenethylpiperidine (ANPP) | Precursor in fentanyl manufacture. |
| 2933.37.00.00 | N-Phenethyl-4-piperidone (NPP) | Precursor chemical for synthetic opioids. |
| 2933.39.00.00 | Other pyridine derivatives and related compounds | Includes collidines, lutidines, picolines, and fungicides. |
| 2933.39.10.00 | Collidines, lutidines and picolines | Alkyl-substituted pyridines with various uses. |
| 2933.39.21.00 | Fungicides | Compounds used to protect crops from fungal diseases. |
| 2933.39.23.00 | o-Paraquat dichloride | Widely used herbicide. |
| 2933.39.31.00 | Antidepressants, tranquilizers and other psychotherapeutic agents | Central nervous system active pharmaceuticals. |
| 2933.41.00.00 | Levorphanol and its salts | Opioid analgesic substances. |
| 2933.49.00.00 | Other quinoline and isoquinoline derivatives | Includes Ethoxyquin and 4,7-Dichloroquinoline. |
| 2933.52.10.00 | Malonylurea (Barbituric acid) | Core structure of barbiturates. |
| 2933.53.00.00 | Barbiturates and salts thereof | Includes amobarbital, phenobarbital, pentobarbital, and others. |
| 2933.55.00.00 | Loprazolam, mecloqualone, methaqualone and zipeprol; salts thereof | Sedative and hypnotic drugs. |
| 2933.59.10.00 | Herbicides | Various herbicidal compounds. |
| 2933.59.21.00 | Antihistamines, including anti-nauseants | Pharmaceutical compounds for allergy and nausea treatment. |
| 2933.61.00.00 | Melamine | Used in plastics and resin production. |
| 2933.69.50.00 | Hexamethylenetetramine | Industrial chemical and pharmaceutical intermediate. |
| 2933.71.00.00 | 6-Hexanelactam (ε-Caprolactam) | Precursor for nylon-6 production. |
| 2933.79.20.00 | N-Methyl-2-pyrrolidone and 2-Pyrrolidone | Solvents and intermediates in chemical industries. |
| 2933.91.00.00 | Various benzodiazepines and salts thereof | Includes alprazolam, diazepam, lorazepam and others. |
| 2933.92.00.00 | Azinphos-methyl | Organophosphate insecticide. |
| 2933.99.00.00 | Other nitrogen heterocyclic compounds not elsewhere specified | Includes insecticides, analgesics, photographic chemicals, and other specialized compounds. |
| 2933.99.55.00 | Analgesics, antipyretics and nonhormonal anti-inflammatory agents | Tolmetin and its sodium salts. |
| 2933.99.82.10 | Benzotriazole | Corrosion inhibitor and UV stabilizer. |
| 2933.99.85.00 | 3-Amino-1,2,4-triazole | Herbicide and biochemical reagent. |
What is NOT Classified Here?
To ensure proper classification, the following are excluded from this heading:
- Compounds containing hetero-atoms other than nitrogen in their heterocyclic rings are classified elsewhere.
- Simple nitrogenous bases such as ammonia and its salts are outside this heading.
- Non-heterocyclic nitrogen compounds such as amines and amides fall under different headings.
Notes
- Regulatory Controls: Many compounds under this heading are controlled substances or regulated chemicals due to their pharmaceutical or pesticidal uses.
- Duty Rates: Vary widely depending on the specific compound and its application. Some pharmaceuticals may be duty-free under trade agreements.
- Additional U.S. Notes: Certain products are subject to special notes and restrictions as per U.S. Customs regulations (e.g., Additional U.S. Note 3 to Section VI).
Declaration Example
Product: A shipment of phenazone and its derivatives for pharmaceutical manufacturing.US HTS Code:
2933.11.00.00(Phenazone and its derivatives)Unit of Quantity: Kilogram (kg)
General Duty Rate: Check current USHTS (May be duty-free or subject to low tariff)
Additional Requirements: Compliance with FDA and DEA regulations if applicable.
Related HTS Codes
- HTS 2934: Nucleic acids and their salts
- HTS 2935: Sulfonamides
- HTS 3003: Medicaments consisting of mixed or unmixed products
- HTS 3808: Insecticides, rodenticides, fungicides, herbicides and similar products
