{
  "meta": {
    "disclaimer": "Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated. We may limit or otherwise restrict your access to the API in line with our Terms of Service.",
    "terms": "https://open.fda.gov/terms/",
    "license": "https://open.fda.gov/license/",
    "last_updated": "2025-09-19",
    "results": {
      "skip": 0,
      "limit": 1,
      "total": 1
    }
  },
  "results": [
    {
      "codes": [
        {
          "uuid": "18c63531-40aa-4e6d-8f3d-26d643af0ec4",
          "code": "1314-41-6",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=1314-41-6",
          "code_system": "CAS",
          "references": [
            "51d08e41-0f55-4b8d-8a75-aa531d3b2823",
            "cb8840f0-88bd-4250-84ed-d8e0abfb512b"
          ]
        },
        {
          "uuid": "2add2587-0f00-481a-9cfd-b28cadcf6887",
          "code": "C028356",
          "type": "PRIMARY",
          "url": "http://www.ncbi.nlm.nih.gov/mesh/67028356",
          "code_system": "MESH",
          "references": [
            "51d08e41-0f55-4b8d-8a75-aa531d3b2823"
          ]
        },
        {
          "uuid": "22e6c136-fe83-4968-979f-b41b5678c200",
          "code": "1593125",
          "comments": "RxNorm",
          "type": "PRIMARY",
          "url": "https://rxnav.nlm.nih.gov/REST/rxcui/1593125/allProperties.xml?prop=all",
          "code_system": "RXCUI",
          "references": [
            "51d08e41-0f55-4b8d-8a75-aa531d3b2823"
          ]
        },
        {
          "uuid": "6c3189d2-3b50-4c50-91e0-123df41c7d33",
          "code": "m6750",
          "comments": "Merck Index",
          "type": "PRIMARY",
          "url": "https://merckindex.rsc.org/monographs/m6750?q=authorize",
          "code_system": "MERCK INDEX",
          "references": [
            "51d08e41-0f55-4b8d-8a75-aa531d3b2823"
          ]
        },
        {
          "uuid": "5c992c35-ba79-4f5d-8f83-4a4e2557e390",
          "code": "1335-25-7",
          "type": "GENERIC (FAMILY)",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=1335-25-7",
          "code_system": "CAS",
          "references": [
            "51d08e41-0f55-4b8d-8a75-aa531d3b2823",
            "1a5a9b54-628d-41fa-951c-17b4a4043ebb"
          ]
        },
        {
          "uuid": "1c9d3bb7-727d-4efb-82fb-c123f9d59cff",
          "code": "LEAD(II,IV) OXIDE",
          "type": "PRIMARY",
          "url": "https://en.wikipedia.org/wiki/Lead(II,IV)_oxide",
          "code_system": "WIKIPEDIA",
          "references": [
            "51d08e41-0f55-4b8d-8a75-aa531d3b2823"
          ]
        },
        {
          "uuid": "8dd42ffe-7069-4066-9283-1811ac9eed5a",
          "code": "215-235-6",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.013.851",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "51d08e41-0f55-4b8d-8a75-aa531d3b2823"
          ]
        },
        {
          "uuid": "a9eaf026-7124-e312-0d37-d50efcf3e264",
          "code": "5801",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/source/hsdb/5801",
          "code_system": "HSDB",
          "references": [
            "cdf4b88b-3039-82fa-355d-6145ff76647b"
          ]
        },
        {
          "uuid": "6bc45e3d-4b1d-87fb-5e05-dc8208fab4da",
          "code": "DTXSID5029637",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID5029637",
          "code_system": "EPA CompTox",
          "references": [
            "f8c06a1c-0860-1936-948c-6dea4a37411d"
          ]
        },
        {
          "uuid": "3f0d9e26-1da5-4122-82af-222214dd8772",
          "code": "A4G39L7HN2",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "747546d8-84bd-af21-9add-6dc30bb32de5",
          "code": "A4G39L7HN2",
          "type": "PRIMARY",
          "url": "https://dailymed.nlm.nih.gov/dailymed/search.cfm?adv=1&query=A4G39L7HN2",
          "code_system": "DAILYMED",
          "references": [
            "a071acda-a050-3b06-943f-9d715a301a96"
          ]
        },
        {
          "uuid": "01c0e832-35fb-6592-2798-2845d3506b43",
          "code": "300000053393",
          "type": "PRIMARY",
          "code_system": "SMS_ID",
          "references": [
            "cb2dff38-09b4-ca9a-b5e6-446117af173f"
          ]
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "f73bec1c-8fcf-4a01-bf39-b2253156c5aa",
          "name": "LEAD TETROXIDE",
          "stdName": "LEAD TETROXIDE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6a42b19c-951c-417c-beeb-7d153f68c376",
            "1b95108c-8524-4e9d-a785-2b0fd6eb841f",
            "31019ed6-216a-4ae6-bce7-1a2e5339b11d",
            "df38ee32-2bc4-42a7-9eb8-15ba8ef6d1f3",
            "c445b48c-7204-4ce0-8c57-08971f6b13dc",
            "9f4d6b52-539e-4db4-bff0-4554ceda2861",
            "f240d7e6-6435-4b89-b514-194d94852478"
          ],
          "display_name": true
        },
        {
          "uuid": "4bea4d03-dfe0-418d-b3c1-4f1681d7c489",
          "name": "LEAD TETROXIDE [HSDB]",
          "stdName": "LEAD TETROXIDE [HSDB]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6a42b19c-951c-417c-beeb-7d153f68c376"
          ],
          "display_name": false
        },
        {
          "uuid": "ce39d391-7568-4ef7-8085-0400b3b89530",
          "name": "LEAD TETROXIDE [MI]",
          "stdName": "LEAD TETROXIDE [MI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "9f4d6b52-539e-4db4-bff0-4554ceda2861"
          ],
          "display_name": false
        },
        {
          "uuid": "21483f44-ddd6-480d-8526-a592dde4539f",
          "name": "LEAD(II,IV) OXIDE",
          "stdName": "LEAD(II,IV) OXIDE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "2185ad70-5554-4cf6-90c4-08134f2a67fb"
          ],
          "display_name": false
        },
        {
          "uuid": "9503aa4d-8f8d-840a-cdca-699dd0f957f6",
          "name": "Lead tetroxide [WHO-DD]",
          "stdName": "LEAD TETROXIDE [WHO-DD]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "a5ecd7cf-7ccc-c024-b893-96693e275551"
          ],
          "display_name": false
        },
        {
          "uuid": "164f86d0-d6d9-499b-b852-fc681e83719d",
          "name": "MINIUM",
          "stdName": "MINIUM",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "c445b48c-7204-4ce0-8c57-08971f6b13dc"
          ],
          "display_name": false
        },
        {
          "uuid": "3707cd55-4ec2-40cb-b454-f1311b185ae5",
          "name": "RED LEAD",
          "stdName": "RED LEAD",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "c445b48c-7204-4ce0-8c57-08971f6b13dc"
          ],
          "display_name": false
        },
        {
          "uuid": "9005b626-7ec1-49e5-a4bf-3efe6a391f15",
          "name": "TRIPLUMBIC TETROXIDE",
          "stdName": "TRIPLUMBIC TETROXIDE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "c445b48c-7204-4ce0-8c57-08971f6b13dc"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "c445b48c-7204-4ce0-8c57-08971f6b13dc",
          "citation": "WIKIPEDIA",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "9f4d6b52-539e-4db4-bff0-4554ceda2861",
          "citation": "MERCK INDEX",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "6a42b19c-951c-417c-beeb-7d153f68c376",
          "citation": "HSDB",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "1b95108c-8524-4e9d-a785-2b0fd6eb841f",
          "citation": "WHO-DD",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "2185ad70-5554-4cf6-90c4-08134f2a67fb",
          "citation": "https://en.wikipedia.org/wiki/Lead%28II,IV%29_oxide",
          "url": "https://en.wikipedia.org/wiki/Lead%28II,IV%29_oxide",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "51d08e41-0f55-4b8d-8a75-aa531d3b2823",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391765000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "d3e93c3c-c358-411c-b4b4-3f5ced172eb1",
          "citation": "SRS import [A4G39L7HN2]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=A4G39L7HN2",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391765000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "f240d7e6-6435-4b89-b514-194d94852478",
          "citation": "LEAD TETROXIDE [MI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "df38ee32-2bc4-42a7-9eb8-15ba8ef6d1f3",
          "citation": "LEAD TETROXIDE [HSDB]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "31019ed6-216a-4ae6-bce7-1a2e5339b11d",
          "citation": "LEAD TETROXIDE [WHO-DD]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "cdf4b88b-3039-82fa-355d-6145ff76647b",
          "citation": "WEBSITE",
          "url": "https://toxnet.nlm.nih.gov/cgi-bin/sis/search2/r?dbs+hsdb:@term+@rn+@rel+1314-41-6",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "f8c06a1c-0860-1936-948c-6dea4a37411d",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=1314-41-6",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "cb8840f0-88bd-4250-84ed-d8e0abfb512b",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "1a5a9b54-628d-41fa-951c-17b4a4043ebb",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "a071acda-a050-3b06-943f-9d715a301a96",
          "citation": "DailyMed",
          "doc_type": "DAILYMED",
          "public_domain": true
        },
        {
          "uuid": "a5ecd7cf-7ccc-c024-b893-96693e275551",
          "citation": "WHO-DD",
          "doc_type": "WHO DRUG DICTIONARY",
          "public_domain": true
        },
        {
          "uuid": "cb2dff38-09b4-ca9a-b5e6-446117af173f",
          "citation": "SMS",
          "doc_type": "EMA LIST",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "4571724b-fd30-4c9c-acd8-37eab0b96419",
          "id": "4571724b-fd30-4c9c-acd8-37eab0b96419",
          "molfile": "\n  Marvin  01132103392D          \n\n  1  0  0  0  0  0            999 V2000\n    3.2500   -0.2188    0.0000 O   0  5  0  0  0  0  0  0  0  0  0  0\nM  CHG  1   1  -1\nM  END",
          "smiles": "[OH-]",
          "formula": "HO",
          "atropisomerism": "No",
          "charge": -1,
          "count": 4,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 4,
            "units": "MOL RATIO",
            "uuid": "a83802a6-a887-4cd6-9bc5-69b4028b1b67"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "17.0073",
          "optical_activity": "NONE",
          "stereo_centers": 0
        },
        {
          "uuid": "f3876eb6-6b49-456c-b30d-68987edc7581",
          "id": "f3876eb6-6b49-456c-b30d-68987edc7581",
          "molfile": "\n  Marvin  01132112382D          \n\n  1  0  0  0  0  0            999 V2000\n   -1.9688   -0.4063    0.0000 Pb  0  2  0  0  0  0  0  0  0  0  0  0\nM  CHG  1   1   2\nM  END",
          "smiles": "[Pb+2]",
          "formula": "Pb",
          "atropisomerism": "No",
          "charge": 2,
          "count": 2,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 2,
            "units": "MOL RATIO",
            "uuid": "e39fe181-c280-4538-b12a-a10cbab98915"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "207.2169",
          "optical_activity": "NONE",
          "stereo_centers": 0
        },
        {
          "uuid": "05eb0beb-0842-4f20-a4da-dd403d0f6d04",
          "id": "05eb0beb-0842-4f20-a4da-dd403d0f6d04",
          "molfile": "\n  Marvin  01132100362D          \n\n  1  0  0  0  0  0            999 V2000\n    0.5938   -0.3125    0.0000 Pb  0  0  0  0  0  0  0  0  0  0  0  0\nM  CHG  1   1   4\nM  END",
          "smiles": "[Pb+4]",
          "formula": "Pb",
          "atropisomerism": "No",
          "charge": 4,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "0d6f5b2e-1d87-4461-b0ab-28ef1de6b5f7"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "207.2169",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "298bebc7-13be-4c6a-a936-19469bdf502d",
      "version": "9",
      "structure": {
        "id": "820c7f30-d1d4-4da2-a018-f30399423bde",
        "molfile": "\n  Marvin  01132106452D          \n\n  7  0  0  0  0  0            999 V2000\n    0.5938   -0.3125    0.0000 Pb  0  0  0  0  0  0  0  0  0  0  0  0\n   -1.9688   -0.4063    0.0000 Pb  0  2  0  0  0  0  0  0  0  0  0  0\n    3.2500   -0.2188    0.0000 O   0  6  0  0  0  0  0  0  0  0  0  0\n   -1.9688   -0.4063    0.0000 Pb  0  2  0  0  0  0  0  0  0  0  0  0\n    3.2500   -0.2188    0.0000 O   0  6  0  0  0  0  0  0  0  0  0  0\n    3.2500   -0.2188    0.0000 O   0  6  0  0  0  0  0  0  0  0  0  0\n    3.2500   -0.2188    0.0000 O   0  6  0  0  0  0  0  0  0  0  0  0\nM  CHG  7   1   4   2   2   3  -2   4   2   5  -2   6  -2   7  -2\nM  STY  2   1 MUL   2 MUL\nM  SCN  1   1 HT \nM  SAL   1  2   2   4\nM  SPA   1  1   2\nM  SDI   1  4   -2.3888   -0.8263   -2.3888    0.0137\nM  SDI   1  4   -1.5488    0.0137   -1.5488   -0.8263\nM  SMT   1 2\nM  SCN  1   2 HT \nM  SAL   2  4   3   5   6   7\nM  SPA   2  1   3\nM  SDI   2  4    2.8300   -0.6388    2.8300    0.2012\nM  SDI   2  4    3.6700    0.2012    3.6700   -0.6388\nM  SMT   2 4\nM  END",
        "smiles": "[O-2].[O-2].[O-2].[O-2].[Pb+2].[Pb+2].[Pb+4]",
        "formula": "4O.3Pb",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "685.6483",
        "optical_activity": "NONE",
        "references": [
          "d3e93c3c-c358-411c-b4b4-3f5ced172eb1",
          "c445b48c-7204-4ce0-8c57-08971f6b13dc"
        ],
        "stereo_centers": 0
      },
      "unii": "A4G39L7HN2"
    }
  ]
}