{
  "summary": "HS code 2904.35 covers perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, other salts of perfluorooctane sulphonic acid. It sits in heading 29.04 (sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated) in chapter 29 (organic chemicals). Other goods of heading 29.04 are classified under 2904.10 (derivatives containing only sulpho groups, their salts and ethyl esters), 2904.20 (derivatives containing only nitro or only nitroso groups), 2904.31 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, perfluorooctane sulphonic acid), 2904.32 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, ammonium perfluorooctane sulphonate) or 5 others.",
  "updatedAt": "2026-10-13",
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      "label": "HS code",
      "value": "2904.35",
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    },
    {
      "label": "Covers",
      "value": "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, other salts of perfluorooctane sulphonic acid",
      "source": "border.bot release GLOBAL:hs #1"
    },
    {
      "label": "Heading",
      "value": "29.04: Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated",
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      "url": "https://staging.border.bot/hs-codes/2904"
    },
    {
      "label": "Chapter",
      "value": "29: Organic chemicals",
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    {
      "label": "Edition",
      "value": "HS2022",
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    },
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  "faq": [
    {
      "question": "What does HS code 2904.35 cover?",
      "answer": "HS code 2904.35 covers perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, other salts of perfluorooctane sulphonic acid."
    },
    {
      "question": "Which heading and chapter is HS code 2904.35 in?",
      "answer": "HS code 2904.35 is in heading 29.04 (sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated) in chapter 29 (organic chemicals)."
    },
    {
      "question": "Where are goods of heading 29.04 classified when 2904.35 doesn’t fit?",
      "answer": "Other goods of heading 29.04 are classified under 2904.10 (derivatives containing only sulpho groups, their salts and ethyl esters), 2904.20 (derivatives containing only nitro or only nitroso groups), 2904.31 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, perfluorooctane sulphonic acid), 2904.32 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, ammonium perfluorooctane sulphonate) or 5 others."
    }
  ],
  "sections": [
    {
      "id": "covers",
      "title": "What this code covers",
      "text": [
        "HS code 2904.35 covers perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, other salts of perfluorooctane sulphonic acid.",
        "The legal text of the subheading is “Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Other salts of perfluorooctane sulphonic acid”, read under “Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride”, in HS2022."
      ]
    },
    {
      "id": "not-covered",
      "title": "What it doesn’t cover",
      "text": [
        "Other goods of heading 29.04 are classified under 2904.10 (derivatives containing only sulpho groups, their salts and ethyl esters), 2904.20 (derivatives containing only nitro or only nitroso groups), 2904.31 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, perfluorooctane sulphonic acid), 2904.32 (perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride, ammonium perfluorooctane sulphonate) or 5 others."
      ]
    },
    {
      "id": "structure",
      "title": "How it is structured",
      "text": [
        "2904.35 is a six-digit subheading. Its first two digits, 29, are the chapter; the first four, 2904, are heading 29.04; the last two, 35, identify the subheading within the heading.",
        "Countries add their own digits after these six for their national tariff lines."
      ]
    },
    {
      "id": "other-countries",
      "title": "In other countries",
      "text": [
        "No national tariff lines under 2904.35 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 2904.35 at six digits and add their own digits after it."
      ]
    },
    {
      "id": "sources",
      "title": "Sources and updates",
      "text": [
        "The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.",
        "This page was last updated on 13 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."
      ]
    }
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  "data": {
    "type": "hs-subheading",
    "edition": "HS2022",
    "chapter": {
      "code": "29",
      "description": "Organic chemicals"
    },
    "heading": {
      "code": "2904",
      "description": "Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated"
    },
    "subheading": {
      "code": "290435",
      "description": "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Other salts of perfluorooctane sulphonic acid",
      "levels": [
        "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride",
        "Other salts of perfluorooctane sulphonic acid"
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      "english": null,
      "keywords": []
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      {
        "code": "290410",
        "description": "Derivatives containing only sulpho groups, their salts and ethyl esters"
      },
      {
        "code": "290420",
        "description": "Derivatives containing only nitro or only nitroso groups"
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      {
        "code": "290431",
        "description": "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Perfluorooctane sulphonic acid"
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        "code": "290432",
        "description": "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Ammonium perfluorooctane sulphonate"
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      {
        "code": "290433",
        "description": "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Lithium perfluorooctane sulphonate"
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        "code": "290434",
        "description": "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Potassium perfluorooctane sulphonate"
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        "code": "290436",
        "description": "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Perfluorooctane sulphonyl fluoride"
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      {
        "code": "290491",
        "description": "Other: Trichloronitromethane (chloropicrin)"
      },
      {
        "code": "290499",
        "description": "Other: Other"
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      "description": "Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: Potassium perfluorooctane sulphonate",
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    "provenance": [
      {
        "dataset": "GLOBAL:hs",
        "country": "GLOBAL",
        "kind": "hs",
        "seq": 1,
        "version": "mytraddal hs2022.csv (HS 2022)",
        "liveAt": "2026-10-13T08:43:06.218Z",
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  "code": "290435",
  "attribution": "border.bot tariff reference (border.bot), compiled from the official publishers named on each page.",
  "terms": "https://staging.border.bot/legal/terms",
  "notice": "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.",
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