{
  "summary": "HS code 3812.31 covers anti-oxidising preparations and other compound stabilisers for rubber or plastics, mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ). It sits in heading 38.12 (prepared rubber accelerators; compound plasticisers for rubber or plastics, not elsewhere specified or included; anti-oxidising preparations and other compound stabilisers for rubber or plastics) in chapter 38 (miscellaneous chemical products). Other goods of heading 38.12 are classified under 3812.10 (prepared rubber accelerators), 3812.20 (compound plasticisers for rubber or plastics) and 3812.39 (anti-oxidising preparations and other compound stabilisers for rubber or plastics, other). National tariff lines under 3812.31 are live on border.bot for the United States (1 line, also used by 1 other country).",
  "updatedAt": "2026-10-11",
  "facts": [
    {
      "label": "HS code",
      "value": "3812.31",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Covers",
      "value": "Anti-oxidising preparations and other compound stabilisers for rubber or plastics, mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ)",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Heading",
      "value": "38.12: Prepared rubber accelerators; compound plasticisers for rubber or plastics, not elsewhere specified or included; anti-oxidising preparations and other compound stabilisers for rubber or plastics",
      "source": "border.bot release GLOBAL:hs #2",
      "url": "https://border.bot/hs-codes/3812"
    },
    {
      "label": "Chapter",
      "value": "38: Miscellaneous chemical products",
      "source": "border.bot release GLOBAL:hs #2",
      "url": "https://border.bot/hs-codes/38"
    },
    {
      "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/381231"
    }
  ],
  "faq": [
    {
      "question": "What does HS code 3812.31 cover?",
      "answer": "HS code 3812.31 covers anti-oxidising preparations and other compound stabilisers for rubber or plastics, mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ)."
    },
    {
      "question": "Which heading and chapter is HS code 3812.31 in?",
      "answer": "HS code 3812.31 is in heading 38.12 (prepared rubber accelerators; compound plasticisers for rubber or plastics, not elsewhere specified or included; anti-oxidising preparations and other compound stabilisers for rubber or plastics) in chapter 38 (miscellaneous chemical products)."
    },
    {
      "question": "Where are goods of heading 38.12 classified when 3812.31 doesn’t fit?",
      "answer": "Other goods of heading 38.12 are classified under 3812.10 (prepared rubber accelerators), 3812.20 (compound plasticisers for rubber or plastics) and 3812.39 (anti-oxidising preparations and other compound stabilisers for rubber or plastics, other)."
    },
    {
      "question": "Which countries’ tariffs list national lines under HS code 3812.31?",
      "answer": "National tariff lines under 3812.31 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 3812.31 covers anti-oxidising preparations and other compound stabilisers for rubber or plastics, mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ).",
        "The legal text of the subheading is “Anti-oxidising preparations and other compound stabilisers for rubber or plastics: Mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ)”, read under “Anti-oxidising preparations and other compound stabilisers for rubber or plastics”, in HS2022."
      ]
    },
    {
      "id": "not-covered",
      "title": "What it doesn’t cover",
      "text": [
        "Other goods of heading 38.12 are classified under 3812.10 (prepared rubber accelerators), 3812.20 (compound plasticisers for rubber or plastics) and 3812.39 (anti-oxidising preparations and other compound stabilisers for rubber or plastics, other)."
      ]
    },
    {
      "id": "structure",
      "title": "How it is structured",
      "text": [
        "3812.31 is a six-digit subheading. Its first two digits, 38, are the chapter; the first four, 3812, are heading 38.12; the last two, 31, 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 3812.31 are live on border.bot for the United States (1 line, 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-subheading",
    "edition": "HS2022",
    "chapter": {
      "code": "38",
      "description": "Miscellaneous chemical products"
    },
    "heading": {
      "code": "3812",
      "description": "Prepared rubber accelerators; compound plasticisers for rubber or plastics, not elsewhere specified or included; anti-oxidising preparations and other compound stabilisers for rubber or plastics"
    },
    "subheading": {
      "code": "381231",
      "description": "Anti-oxidising preparations and other compound stabilisers for rubber or plastics: Mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ)",
      "levels": [
        "Anti-oxidising preparations and other compound stabilisers for rubber or plastics",
        "Mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ)"
      ],
      "english": null,
      "keywords": []
    },
    "siblings": [
      {
        "code": "381210",
        "description": "Prepared rubber accelerators"
      },
      {
        "code": "381220",
        "description": "Compound plasticisers for rubber or plastics"
      },
      {
        "code": "381239",
        "description": "Anti-oxidising preparations and other compound stabilisers for rubber or plastics: Other"
      }
    ],
    "related": [],
    "previous": {
      "code": "381220",
      "description": "Compound plasticisers for rubber or plastics",
      "indexable": true
    },
    "next": {
      "code": "381239",
      "description": "Anti-oxidising preparations and other compound stabilisers for rubber or plastics: Other",
      "indexable": true
    },
    "schedules": [
      {
        "code": "US",
        "name": "United States",
        "slug": "united-states",
        "lines": 1,
        "members": 1
      }
    ],
    "provenance": [
      {
        "dataset": "GLOBAL:hs",
        "country": "GLOBAL",
        "kind": "hs",
        "seq": 2,
        "version": "mytraddal hs2022.csv (HS 2022)",
        "liveAt": "2026-10-11T06:04:17.693Z",
        "origin": "upload",
        "sourceUrls": []
      }
    ],
    "dateModified": "2026-10-11T06:04:17.693Z",
    "seo": {
      "canonicalPath": "/hs-codes/381231",
      "robots": "index",
      "sitemap": true,
      "reasons": [
        "live legal text"
      ]
    }
  },
  "pagination": {
    "page": 1,
    "pages": 1,
    "size": 100,
    "total": 0,
    "prev": null,
    "next": null
  },
  "previous": "https://border.bot/hs-codes/381220",
  "next": "https://border.bot/hs-codes/381239",
  "links": {
    "self": "https://border.bot/hs-codes/381231.json",
    "html": "https://border.bot/hs-codes/381231",
    "canonical": "https://border.bot/hs-codes/381231",
    "markdown": "https://border.bot/hs-codes/381231.md",
    "tools": {
      "calculator": "https://border.bot/tools/landed-cost-calculator",
      "classifier": "https://border.bot/tools/hs-code-classifier",
      "api": "https://api.border.bot/v1"
    }
  },
  "code": "381231",
  "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.",
  "catalogVersion": "08bc53aa"
}