{
  "summary": "HS code 2804.21 covers rare gases, argon. It sits in heading 28.04 (hydrogen, rare gases and other non-metals) in chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes). Other goods of heading 28.04 are classified under 2804.10 (hydrogen), 2804.29 (rare gases, other), 2804.30 (nitrogen), 2804.40 (oxygen) or 6 others. National tariff lines under 2804.21 are live on border.bot for the United States (1 line, also used by 1 other country).",
  "updatedAt": "2026-10-11",
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      "label": "HS code",
      "value": "2804.21",
      "source": "border.bot release GLOBAL:hs #2"
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    {
      "label": "Covers",
      "value": "Rare gases, argon",
      "source": "border.bot release GLOBAL:hs #2"
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    {
      "label": "Heading",
      "value": "28.04: Hydrogen, rare gases and other non-metals",
      "source": "border.bot release GLOBAL:hs #2",
      "url": "https://border.bot/hs-codes/2804"
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    {
      "label": "Chapter",
      "value": "28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes",
      "source": "border.bot release GLOBAL:hs #2",
      "url": "https://border.bot/hs-codes/28"
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    {
      "label": "Edition",
      "value": "HS2022",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Duty in the United States",
      "value": "See its 1 line",
      "source": null,
      "url": "https://border.bot/countries/united-states/hs-codes/280421"
    }
  ],
  "faq": [
    {
      "question": "What does HS code 2804.21 cover?",
      "answer": "HS code 2804.21 covers rare gases, argon."
    },
    {
      "question": "Which heading and chapter is HS code 2804.21 in?",
      "answer": "HS code 2804.21 is in heading 28.04 (hydrogen, rare gases and other non-metals) in chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes)."
    },
    {
      "question": "Where are goods of heading 28.04 classified when 2804.21 doesn’t fit?",
      "answer": "Other goods of heading 28.04 are classified under 2804.10 (hydrogen), 2804.29 (rare gases, other), 2804.30 (nitrogen), 2804.40 (oxygen) or 6 others."
    },
    {
      "question": "Which countries’ tariffs list national lines under HS code 2804.21?",
      "answer": "National tariff lines under 2804.21 are live on border.bot for the United States (1 line, also used by 1 other country)."
    }
  ],
  "sections": [
    {
      "id": "covers",
      "title": "What this code covers",
      "text": [
        "HS code 2804.21 covers rare gases, argon.",
        "The legal text of the subheading is “Rare gases: Argon”, read under “Rare gases”, in HS2022."
      ]
    },
    {
      "id": "not-covered",
      "title": "What it doesn’t cover",
      "text": [
        "Other goods of heading 28.04 are classified under 2804.10 (hydrogen), 2804.29 (rare gases, other), 2804.30 (nitrogen), 2804.40 (oxygen) or 6 others."
      ]
    },
    {
      "id": "structure",
      "title": "How it is structured",
      "text": [
        "2804.21 is a six-digit subheading. Its first two digits, 28, are the chapter; the first four, 2804, are heading 28.04; the last two, 21, 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": [
        "National tariff lines under 2804.21 are live on border.bot for the United States (1 line, also used by 1 other country)."
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      "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."
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    }
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    "edition": "HS2022",
    "chapter": {
      "code": "28",
      "description": "Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes"
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    "heading": {
      "code": "2804",
      "description": "Hydrogen, rare gases and other non-metals"
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    "subheading": {
      "code": "280421",
      "description": "Rare gases: Argon",
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        "dataset": "GLOBAL:hs",
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  "code": "280421",
  "attribution": "border.bot tariff reference (border.bot), compiled from the official publishers named on each page.",
  "terms": "https://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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