{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/bentonite",
  "slug": "bentonite",
  "name": "Bentonite",
  "identifiers": {
    "e_number": "E558",
    "ins_number": null,
    "cas_number": "1302-78-9",
    "inchikey": null,
    "pubchem_cid": null
  },
  "functional_class": null,
  "summary": "Bentonite is a clay used to clarify wine, beer and juice: it binds haze-forming proteins and is then filtered out. It is a processing aid rather than an ingredient of the finished drink.",
  "derivation_summary": "Mined volcanic clay, chiefly montmorillonite, then purified and milled. Because it is removed before bottling it is one of the reasons a wine may or may not be vegan — bentonite is mineral, but other fining agents are not.",
  "regulatory_status": [
    {
      "jurisdiction": "US",
      "jurisdiction_name": "United States",
      "authority": "Food and Drug Administration",
      "status": "permitted",
      "status_label": "Permitted",
      "provision_count": 1,
      "provisions": [
        {
          "status": "permitted",
          "food_category": null,
          "max_level": null,
          "max_level_unit": null,
          "conditions": null,
          "effective_from": null,
          "citation": {
            "ref": "21 CFR 184.1155",
            "url": "https://www.ecfr.gov/current/title-21/section-184.1155"
          },
          "source": "ecfr",
          "retrieved_at": "2026-09-07T18:25:51.549Z"
        }
      ]
    },
    {
      "jurisdiction": "CODEX",
      "jurisdiction_name": "Codex Alimentarius",
      "authority": "Codex Alimentarius Commission / JECFA",
      "status": "not_listed",
      "status_label": "Not listed",
      "note": "Does not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.",
      "provision_count": 0,
      "provisions": []
    }
  ],
  "names": [
    {
      "name": "1302-78-9",
      "type": "cas",
      "source": "ecfr"
    },
    {
      "name": "Bentonite",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "E 558",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "E558",
      "type": "e_number",
      "source": "openfoodtox"
    },
    {
      "name": "Dioxosilane; oxo(oxoalumanyloxy)alumane; hydrate",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "Bentonite",
      "type": "label",
      "source": "ecfr"
    }
  ],
  "hazard_reference_values": [],
  "sources": [
    {
      "key": "ecfr",
      "name": "Electronic Code of Federal Regulations, Title 21",
      "publisher": "U.S. Government Publishing Office / National Archives",
      "licence": "Public domain",
      "url": "https://www.ecfr.gov/api/versioner/v1/full/2026-08-31/title-21.xml",
      "retrieved_at": "2026-09-07T18:25:51.549Z"
    }
  ],
  "citation_policy": "Cite as: Food Additive Index, \"Bentonite\", https://foodadditiveindex.com/additives/bentonite. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.430Z"
}