{
  "summary": "HS heading 29.33 covers heterocyclic compounds with nitrogen hetero-atom(s) only. It is in chapter 29 (organic chemicals). It is split into 27 subheadings: 2933.11 (compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, phenazone (antipyrin) and its derivatives), 2933.19 (compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, other), 2933.21 (compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure, hydantoin and its derivatives), 2933.29 (compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure, other), 2933.31 (compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure, pyridine and its salts), 2933.32 (compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts) and 21 others. National tariff lines under heading 29.33 are live on border.bot for the United States (128 lines, also used by 1 other country).",
  "updatedAt": "2026-10-11",
  "facts": [
    {
      "label": "Heading",
      "value": "29.33",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Description",
      "value": "Heterocyclic compounds with nitrogen hetero-atom(s) only",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Chapter",
      "value": "29: Organic chemicals",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Subheadings",
      "value": "27",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Edition",
      "value": "HS2022",
      "source": "border.bot release GLOBAL:hs #2"
    }
  ],
  "faq": [
    {
      "question": "What does HS heading 29.33 cover?",
      "answer": "HS heading 29.33 covers heterocyclic compounds with nitrogen hetero-atom(s) only."
    },
    {
      "question": "Which chapter is HS heading 29.33 in?",
      "answer": "HS heading 29.33 is in chapter 29 (organic chemicals)."
    },
    {
      "question": "How many subheadings does HS heading 29.33 have?",
      "answer": "HS heading 29.33 has 27 subheadings: 2933.11 (compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, phenazone (antipyrin) and its derivatives), 2933.19 (compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, other), 2933.21 (compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure, hydantoin and its derivatives), 2933.29 (compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure, other), 2933.31 (compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure, pyridine and its salts), 2933.32 (compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts) and 21 others."
    },
    {
      "question": "Which countries’ tariffs list national lines under HS heading 29.33?",
      "answer": "National tariff lines under heading 29.33 are live on border.bot for the United States (128 lines, also used by 1 other country)."
    }
  ],
  "sections": [
    {
      "id": "covers",
      "title": "What this code covers",
      "text": [
        "HS heading 29.33 covers heterocyclic compounds with nitrogen hetero-atom(s) only.",
        "It is split into 27 subheadings: 2933.11 (compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, phenazone (antipyrin) and its derivatives), 2933.19 (compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, other), 2933.21 (compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure, hydantoin and its derivatives), 2933.29 (compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure, other), 2933.31 (compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure, pyridine and its salts), 2933.32 (compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts) and 21 others."
      ]
    },
    {
      "id": "not-covered",
      "title": "What it doesn’t cover",
      "text": [
        "Other goods of chapter 29 are classified in its other 41 headings, listed below."
      ]
    },
    {
      "id": "structure",
      "title": "How it is structured",
      "text": [
        "Heading 29.33 is one of 42 headings in chapter 29. Its first two digits, 29, are the chapter; the next two, 33, number the heading within it. Its subheadings add two more digits (2933.11, 2933.19, 2933.21)."
      ]
    },
    {
      "id": "other-countries",
      "title": "In other countries",
      "text": [
        "National tariff lines under heading 29.33 are live on border.bot for the United States (128 lines, also used by 1 other country)."
      ]
    },
    {
      "id": "sources",
      "title": "Sources and updates",
      "text": [
        "The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.",
        "This page was last updated on 11 October 2026.",
        "Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling."
      ]
    }
  ],
  "data": {
    "type": "hs-heading",
    "edition": "HS2022",
    "chapter": {
      "code": "29",
      "description": "Organic chemicals"
    },
    "heading": {
      "code": "2933",
      "description": "Heterocyclic compounds with nitrogen hetero-atom(s) only"
    },
    "subheadings": [
      {
        "code": "293311",
        "description": "Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure: Phenazone (antipyrin) and its derivatives",
        "levels": [
          "Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure",
          "Phenazone (antipyrin) and its derivatives"
        ]
      },
      {
        "code": "293319",
        "description": "Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure: Other",
        "levels": [
          "Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure",
          "Other"
        ]
      },
      {
        "code": "293321",
        "description": "Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure: Hydantoin and its derivatives",
        "levels": [
          "Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure",
          "Hydantoin and its derivatives"
        ]
      },
      {
        "code": "293329",
        "description": "Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure: Other",
        "levels": [
          "Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure",
          "Other"
        ]
      },
      {
        "code": "293331",
        "description": "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: Pyridine and its salts",
        "levels": [
          "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure",
          "Pyridine and its salts"
        ]
      },
      {
        "code": "293332",
        "description": "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: Piperidine and its salts",
        "levels": [
          "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure",
          "Piperidine and its salts"
        ]
      },
      {
        "code": "293333",
        "description": "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: Alfentanil (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",
        "levels": [
          "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure",
          "Alfentanil (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"
        ]
      },
      {
        "code": "293334",
        "description": "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: Other fentanyls and their derivatives",
        "levels": [
          "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure",
          "Other fentanyls and their derivatives"
        ]
      },
      {
        "code": "293335",
        "description": "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: 3-Quinuclidinol",
        "levels": [
          "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure",
          "3-Quinuclidinol"
        ]
      },
      {
        "code": "293336",
        "description": "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: 4-Anilino-N-phenethylpiperidine (ANPP)",
        "levels": [
          "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure",
          "4-Anilino-N-phenethylpiperidine (ANPP)"
        ]
      },
      {
        "code": "293337",
        "description": "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: N-Phenethyl-4-piperidone (NPP)",
        "levels": [
          "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure",
          "N-Phenethyl-4-piperidone (NPP)"
        ]
      },
      {
        "code": "293339",
        "description": "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: Other",
        "levels": [
          "Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure",
          "Other"
        ]
      },
      {
        "code": "293341",
        "description": "Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused: Levorphanol (INN) and its salts",
        "levels": [
          "Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused",
          "Levorphanol (INN) and its salts"
        ]
      },
      {
        "code": "293349",
        "description": "Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused: Other",
        "levels": [
          "Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused",
          "Other"
        ]
      },
      {
        "code": "293352",
        "description": "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure: Malonylurea (barbituric acid) and its salts",
        "levels": [
          "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure",
          "Malonylurea (barbituric acid) and its salts"
        ]
      },
      {
        "code": "293353",
        "description": "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure: Allobarbital (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",
        "levels": [
          "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure",
          "Allobarbital (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"
        ]
      },
      {
        "code": "293354",
        "description": "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure: Other derivatives of malonylurea (barbituric acid); salts thereof",
        "levels": [
          "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure",
          "Other derivatives of malonylurea (barbituric acid); salts thereof"
        ]
      },
      {
        "code": "293355",
        "description": "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure: Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof",
        "levels": [
          "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure",
          "Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof"
        ]
      },
      {
        "code": "293359",
        "description": "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure: Other",
        "levels": [
          "Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure",
          "Other"
        ]
      },
      {
        "code": "293361",
        "description": "Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure: Melamine",
        "levels": [
          "Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure",
          "Melamine"
        ]
      },
      {
        "code": "293369",
        "description": "Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure: Other",
        "levels": [
          "Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure",
          "Other"
        ]
      },
      {
        "code": "293371",
        "description": "Lactams: 6-Hexanelactam (epsilon-caprolactam)",
        "levels": [
          "Lactams",
          "6-Hexanelactam (epsilon-caprolactam)"
        ]
      },
      {
        "code": "293372",
        "description": "Lactams: Clobazam (INN) and methyprylon (INN)",
        "levels": [
          "Lactams",
          "Clobazam (INN) and methyprylon (INN)"
        ]
      },
      {
        "code": "293379",
        "description": "Lactams: Other lactams",
        "levels": [
          "Lactams",
          "Other lactams"
        ]
      },
      {
        "code": "293391",
        "description": "Other: Alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam (INN), ethyl loflazepate (INN), fludiazepam (INN), flunitrazepam (INN), flurazepam (INN), halazepam (INN), lorazepam (INN), lormetazepam (INN), mazindol (INN), medazepam (INN), midazolam (INN), nimetazepam (INN), nitrazepam (INN), nordazepam (INN), oxazepam (INN), pinazepam (INN), prazepam (INN), pyrovalerone (INN), temazepam (INN), tetrazepam (INN) and triazolam (INN); salts thereof",
        "levels": [
          "Other",
          "Alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam (INN), ethyl loflazepate (INN), fludiazepam (INN), flunitrazepam (INN), flurazepam (INN), halazepam (INN), lorazepam (INN), lormetazepam (INN), mazindol (INN), medazepam (INN), midazolam (INN), nimetazepam (INN), nitrazepam (INN), nordazepam (INN), oxazepam (INN), pinazepam (INN), prazepam (INN), pyrovalerone (INN), temazepam (INN), tetrazepam (INN) and triazolam (INN); salts thereof"
        ]
      },
      {
        "code": "293392",
        "description": "Other: Azinphos-methyl (ISO)",
        "levels": [
          "Other",
          "Azinphos-methyl (ISO)"
        ]
      },
      {
        "code": "293399",
        "description": "Other: Other",
        "levels": [
          "Other",
          "Other"
        ]
      }
    ],
    "otherHeadings": [
      {
        "code": "2901",
        "description": "Acyclic hydrocarbons"
      },
      {
        "code": "2902",
        "description": "Cyclic hydrocarbons"
      },
      {
        "code": "2903",
        "description": "Halogenated derivatives of hydrocarbons"
      },
      {
        "code": "2904",
        "description": "Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated"
      },
      {
        "code": "2905",
        "description": "Acyclic alcohols and their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2906",
        "description": "Cyclic alcohols and their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2907",
        "description": "Phenols; phenol-alcohols"
      },
      {
        "code": "2908",
        "description": "Halogenated, sulphonated, nitrated or nitrosated derivatives of phenols or phenol-alcohols"
      },
      {
        "code": "2909",
        "description": "Ethers, ether-alcohols, ether-phenols, ether-alcohol-phenols, alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides (whether or not chemically defined), and their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2910",
        "description": "Epoxides, epoxyalcohols, epoxyphenols and epoxyethers, with a three-membered ring, and their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2911",
        "description": "Acetals and hemiacetals, whether or not with other oxygen function, and their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2912",
        "description": "Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde"
      },
      {
        "code": "2913",
        "description": "Halogenated, sulphonated, nitrated or nitrosated derivatives of products of heading 29.12"
      },
      {
        "code": "2914",
        "description": "Ketones and quinones, whether or not with other oxygen function, and their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2915",
        "description": "Saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2916",
        "description": "Unsaturated acyclic monocarboxylic acids, cyclic monocarboxylic acids, their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2917",
        "description": "Polycarboxylic acids, their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2918",
        "description": "Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2919",
        "description": "Phosphoric esters and their salts, including lactophosphates; their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2920",
        "description": "Esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives"
      },
      {
        "code": "2921",
        "description": "Amine-function compounds"
      },
      {
        "code": "2922",
        "description": "Oxygen-function amino-compounds"
      },
      {
        "code": "2923",
        "description": "Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined"
      },
      {
        "code": "2924",
        "description": "Carboxyamide-function compounds; amide-function compounds of carbonic acid"
      },
      {
        "code": "2925",
        "description": "Carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds"
      },
      {
        "code": "2926",
        "description": "Nitrile-function compounds"
      },
      {
        "code": "2927",
        "description": "Diazo-, azo- or azoxy-compounds"
      },
      {
        "code": "2928",
        "description": "Organic derivatives of hydrazine or of hydroxylamine"
      },
      {
        "code": "2929",
        "description": "Compounds with other nitrogen function"
      },
      {
        "code": "2930",
        "description": "Organo-sulphur compounds"
      },
      {
        "code": "2931",
        "description": "Other organo-inorganic compounds"
      },
      {
        "code": "2932",
        "description": "Heterocyclic compounds with oxygen hetero-atom(s) only"
      },
      {
        "code": "2934",
        "description": "Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds"
      },
      {
        "code": "2935",
        "description": "Sulphonamides"
      },
      {
        "code": "2936",
        "description": "Provitamins and vitamins, natural or reproduced by synthesis (including natural concentrates), derivatives thereof used primarily as vitamins, and intermixtures of the foregoing, whether or not in any solvent"
      },
      {
        "code": "2937",
        "description": "Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones"
      },
      {
        "code": "2938",
        "description": "Glycosides, natural or reproduced by synthesis, and their salts, ethers, esters and other derivatives"
      },
      {
        "code": "2939",
        "description": "Alkaloids, natural or reproduced by synthesis, and their salts, ethers, esters and other derivatives"
      },
      {
        "code": "2940",
        "description": "Sugars, chemically pure, other than sucrose, lactose, maltose, glucose and fructose; sugar ethers, sugar acetals and sugar esters, and their salts, other than products of heading 2937, 2938 or 2939"
      },
      {
        "code": "2941",
        "description": "Antibiotics"
      },
      {
        "code": "2942",
        "description": "Other organic compounds"
      }
    ],
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