{
  "summary": "In the United States tariff, line 3913.90.10.00 covers chemical derivatives of natural rubber. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 3913.90 in heading 39.13 (chapter 39).",
  "updatedAt": "2026-10-09",
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      "answer": "In the United States tariff, line 3913.90.10.00 covers chemical derivatives of natural rubber."
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      "question": "What is the general (MFN) duty on 3913.90.10.00 in the United States?",
      "answer": "Goods under this line enter free of general (MFN) duty."
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      "id": "covers",
      "title": "What this line covers",
      "text": [
        "In the United States tariff, line 3913.90.10.00 covers chemical derivatives of natural rubber.",
        "Its legal text is “Chemical derivatives of natural rubber”, read under “Other”."
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    },
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      "id": "structure",
      "title": "How it is structured",
      "text": [
        "It falls under HS subheading 3913.90 in heading 39.13 (chapter 39). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff."
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        "No other national tariff on border.bot has live lines under 3913.90 yet."
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        "The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "This page was last updated on 9 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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      "description": "Plastics and articles thereof"
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      "description": "Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms"
    },
    "subheading": {
      "code": "391390",
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      "code": "3913901000",
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