{
  "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": "5662579a-033e-4d0d-9f14-ef5d05662da1",
          "code": "7440-34-8",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=7440-34-8",
          "code_system": "CAS",
          "references": [
            "8519af47-35b5-48f2-93d0-e342bbf46597",
            "ed32e309-0260-4ea8-b60a-71ab235f0983"
          ]
        },
        {
          "uuid": "4b7bfe21-5344-4f9b-a6f1-d28348eee175",
          "code": "D000186",
          "type": "PRIMARY",
          "url": "http://www.ncbi.nlm.nih.gov/mesh/68000186",
          "code_system": "MESH",
          "references": [
            "8519af47-35b5-48f2-93d0-e342bbf46597"
          ]
        },
        {
          "uuid": "19538fd0-f1d2-4773-a664-f84f094b2406",
          "code": "m1397",
          "comments": "Merck Index",
          "type": "PRIMARY",
          "url": "https://merckindex.rsc.org/monographs/m1397?q=authorize",
          "code_system": "MERCK INDEX",
          "references": [
            "8519af47-35b5-48f2-93d0-e342bbf46597"
          ]
        },
        {
          "uuid": "fbe133c1-f5f3-4c3f-ae30-1e5ef1a89587",
          "code": "23965",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/23965",
          "code_system": "PUBCHEM",
          "references": [
            "8519af47-35b5-48f2-93d0-e342bbf46597"
          ]
        },
        {
          "uuid": "bc8e1b1a-389f-0829-7615-c1ecbc11bd44",
          "code": "DTXSID10225388",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID10225388",
          "code_system": "EPA CompTox",
          "references": [
            "c5ae38f9-7e6a-77a5-cf9c-dac0c5da8392"
          ]
        },
        {
          "uuid": "531c75de-4ff1-96db-aa91-bbb7f31c1b0f",
          "code": "7440-34-8",
          "type": "PRIMARY",
          "url": "https://toxnet.nlm.nih.gov/cgi-bin/sis/search2/r?dbs+hsdb:@term+@rn+@rel+7440-34-8",
          "code_system": "HSDB",
          "references": [
            "2d703ff5-5b12-9043-7995-715a54ce04c3"
          ]
        },
        {
          "uuid": "4c4126c1-fb64-39a9-d3e7-5cea0c5bb221",
          "code": "DB12860",
          "type": "PRIMARY",
          "url": "http://www.drugbank.ca/drugs/DB12860",
          "code_system": "DRUG BANK",
          "references": [
            "6b50704c-4b24-fea9-6f04-ed09e56186d6"
          ]
        },
        {
          "uuid": "281c3ffc-f2b6-4758-9f2d-a25930325431",
          "code": "NIK1K0956U",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "fc628e5c-c019-0d11-2eb1-05c4a29c83be",
          "code": "33337",
          "type": "PRIMARY",
          "url": "https://www.ebi.ac.uk/chebi/chebiOntology.do?chebiId=CHEBI:33337",
          "code_system": "CHEBI",
          "references": [
            "6b50704c-4b24-fea9-6f04-ed09e56186d6"
          ]
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "405729ff-a40e-4b66-afa6-cc3bdacfa8fb",
          "name": "AC",
          "stdName": "AC",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "45d731f1-ce6b-497c-a176-2ff4b6816bfe",
            "1f008827-0cec-4e76-8fca-a174f543cd04"
          ],
          "display_name": false
        },
        {
          "uuid": "7f83a469-4042-4ca9-b481-896ecb6d8721",
          "name": "ACTINIUM",
          "stdName": "ACTINIUM",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "45d731f1-ce6b-497c-a176-2ff4b6816bfe",
            "70c48817-cf1f-4374-ad91-bfaa2676ca8e",
            "dc02aea1-fe2e-4f9f-a9da-2dc7e306b154",
            "5754405f-1530-405b-ac1e-ec1b8adc59d7",
            "dc3290c0-0367-4b86-be72-15ae9dd159a3",
            "722730d2-5638-4987-a100-6c3ca05fa0c5",
            "84000134-dcf1-4251-82e7-451730046705"
          ],
          "display_name": true
        },
        {
          "uuid": "f48aa64e-5b31-49b9-a8a2-7a5709dd64fa",
          "name": "ACTINIUM [HSDB]",
          "stdName": "ACTINIUM [HSDB]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "45d731f1-ce6b-497c-a176-2ff4b6816bfe",
            "5754405f-1530-405b-ac1e-ec1b8adc59d7"
          ],
          "display_name": false
        },
        {
          "uuid": "0f4d4fcf-25b4-417e-b43c-455da1b078e5",
          "name": "ACTINIUM [MI]",
          "stdName": "ACTINIUM [MI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "45d731f1-ce6b-497c-a176-2ff4b6816bfe",
            "84000134-dcf1-4251-82e7-451730046705"
          ],
          "display_name": false
        },
        {
          "uuid": "29599fc4-3b77-4510-9254-1f3752fec763",
          "name": "ACTINIUM, ELEMENTAL",
          "stdName": "ACTINIUM, ELEMENTAL",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "45d731f1-ce6b-497c-a176-2ff4b6816bfe",
            "fc397d31-4a86-47c8-9db0-767bdb0112b7"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "dc3290c0-0367-4b86-be72-15ae9dd159a3",
          "citation": "CHEMID 2011 Drugportal",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "722730d2-5638-4987-a100-6c3ca05fa0c5",
          "citation": "DRUGPORTAL 2011",
          "doc_type": "CHEMID",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "84000134-dcf1-4251-82e7-451730046705",
          "citation": "MERCK INDEX",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "45d731f1-ce6b-497c-a176-2ff4b6816bfe",
          "citation": "MERCK INDEX",
          "doc_type": "MERCK INDEX",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "fc397d31-4a86-47c8-9db0-767bdb0112b7",
          "citation": "FDA_SRS",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "1f008827-0cec-4e76-8fca-a174f543cd04",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "5754405f-1530-405b-ac1e-ec1b8adc59d7",
          "citation": "HSDB",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "8519af47-35b5-48f2-93d0-e342bbf46597",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391075000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "151edeaf-b456-40d3-9bc9-b33b700a567b",
          "citation": "SRS import [NIK1K0956U]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=NIK1K0956U",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391075000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "3eac6cb0-aaf6-4704-8eb4-8ec408e89317",
          "citation": "CHEMID  2011",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "dc02aea1-fe2e-4f9f-a9da-2dc7e306b154",
          "citation": "ACTINIUM [MI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "70c48817-cf1f-4374-ad91-bfaa2676ca8e",
          "citation": "ACTINIUM [HSDB]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "2d703ff5-5b12-9043-7995-715a54ce04c3",
          "citation": "WEBSITE",
          "url": "https://toxnet.nlm.nih.gov/cgi-bin/sis/search2/r?dbs+hsdb:@term+@rn+@rel+7440-34-8",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "c5ae38f9-7e6a-77a5-cf9c-dac0c5da8392",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=7440-34-8",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "6b50704c-4b24-fea9-6f04-ed09e56186d6",
          "doc_type": "SYSTEM",
          "public_domain": true
        },
        {
          "uuid": "ed32e309-0260-4ea8-b60a-71ab235f0983",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "c19adf79-5f92-42b9-84c3-115210b77ba6",
          "id": "c19adf79-5f92-42b9-84c3-115210b77ba6",
          "molfile": "\n  Marvin  01132110002D          \n\n  1  0  0  0  0  0            999 V2000\n    0.0000    0.0000    0.0000 Ac  0  0  0  0  0  0  0  0  0  0  0  0\nM  END",
          "smiles": "[Ac]",
          "formula": "Ac",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "7a050cc6-f9ba-4897-b6fb-1c60065a6d5d"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "227.0",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "4b5a64f6-75b9-42d6-a6d2-2294be83e018",
      "version": "6",
      "structure": {
        "id": "c88f90a6-7e14-4e88-bf53-5fd107a18b70",
        "molfile": "\n  Marvin  01132110222D          \n\n  1  0  0  0  0  0            999 V2000\n    0.0000    0.0000    0.0000 Ac  0  0  0  0  0 15  0  0  0  0  0  0\nM  END",
        "smiles": "[Ac]",
        "formula": "Ac",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "227.0",
        "optical_activity": "NONE",
        "references": [
          "151edeaf-b456-40d3-9bc9-b33b700a567b",
          "3eac6cb0-aaf6-4704-8eb4-8ec408e89317"
        ],
        "stereo_centers": 0
      },
      "unii": "NIK1K0956U"
    }
  ]
}