{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/ultramarine-blue",
  "slug": "ultramarine-blue",
  "name": "Ultramarine blue",
  "identifiers": {
    "e_number": null,
    "ins_number": null,
    "cas_number": null,
    "inchikey": "IRERQBUNZFJFGC-UHFFFAOYSA-L",
    "pubchem_cid": 71587188
  },
  "functional_class": null,
  "summary": "Ultramarine blue is a deep blue pigment, historically ground from lapis lazuli and now made synthetically. Its listing in the United States is narrow: it is permitted for colouring salt intended for animal feed, not for human food.",
  "derivation_summary": "Manufactured by heating china clay, sodium carbonate and sulfur to form a sodium aluminosilicate with sulfur trapped in the crystal lattice, which is what produces the colour.",
  "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 73.50",
            "url": "https://www.ecfr.gov/current/title-21/section-73.50"
          },
          "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": "57455-37-5",
      "type": "cas",
      "source": "pubchem"
    },
    {
      "name": "3516 ULTRA BLUE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "3522 ULTRA BLUE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ALUMINUM SODIUM THIOSILICATE BLUE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Azure blue",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "IRERQBUNZFJFGC-UHFFFAOYSA-L",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Lazurite",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "LAZURITE (CA2NA6(AL6(SIO4)6(SO4)S))",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "LAZURITE (NA5(AL3(SIO4)3S))",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Ultramarine",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ULTRAMARINE (MINERAL)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Ultramarine Blue",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ULTRAMARINE BLUE (MINERAL)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ULTRAMARINE BLUE CI 77007",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Ultramarine blue",
      "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, \"Ultramarine blue\", https://foodadditiveindex.com/additives/ultramarine-blue. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.761Z"
}