{
  "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": "f5a97fb9-708f-44bf-a3d7-404e495dec0f",
          "code": "78-78-4",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=78-78-4",
          "code_system": "CAS",
          "references": [
            "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6",
            "33ace636-e12f-4b83-8400-cc0e4052e46d"
          ]
        },
        {
          "uuid": "6b8756b8-aca9-4642-bf38-3623b4d5ee80",
          "code": "C63387",
          "type": "PRIMARY",
          "url": "https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C63387",
          "code_system": "NCI_THESAURUS",
          "references": [
            "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6"
          ]
        },
        {
          "uuid": "6a575916-7774-48e5-98fa-d8638bf9867c",
          "code": "C067038",
          "type": "PRIMARY",
          "url": "http://www.ncbi.nlm.nih.gov/mesh/67067038",
          "code_system": "MESH",
          "references": [
            "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6"
          ]
        },
        {
          "uuid": "a30683b5-c9db-4038-8760-b37ab37a30d9",
          "code": "ISOPENTANE",
          "type": "PRIMARY",
          "url": "https://en.wikipedia.org/wiki/Isopentane",
          "code_system": "WIKIPEDIA",
          "references": [
            "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6"
          ]
        },
        {
          "uuid": "36156f1a-6ab3-426f-991f-c30c252dbed6",
          "code": "1368703",
          "comments": "RxNorm",
          "type": "PRIMARY",
          "url": "https://rxnav.nlm.nih.gov/REST/rxcui/1368703/allProperties.xml?prop=all",
          "code_system": "RXCUI",
          "references": [
            "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6"
          ]
        },
        {
          "uuid": "f69daef0-d097-4b4e-95ce-6598c90e1398",
          "code": "SUB77785",
          "type": "PRIMARY",
          "code_system": "EVMPD",
          "references": [
            "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6"
          ]
        },
        {
          "uuid": "a8eb6caa-d91f-4eae-9508-5c5218228cfd",
          "code": "201-142-8",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.001.039",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6"
          ]
        },
        {
          "uuid": "689ed5ea-2639-4624-ba8a-1390f030d205",
          "code": "6556",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/6556",
          "code_system": "PUBCHEM",
          "references": [
            "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6"
          ]
        },
        {
          "uuid": "67f9bf29-2c28-6123-797a-ce73c0507b7a",
          "code": "618",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/source/hsdb/618",
          "code_system": "HSDB",
          "references": [
            "1663aef1-fab5-f167-0f1e-abc2edf9e7b9"
          ]
        },
        {
          "uuid": "6294be3f-1d1a-ac53-e833-61e758610815",
          "code": "DTXSID8025468",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID8025468",
          "code_system": "EPA CompTox",
          "references": [
            "3fb89a7c-f359-421e-8035-94e27fc4459c"
          ]
        },
        {
          "uuid": "57fd7e1d-439c-cf06-e5dd-0f6aa177232e",
          "code": "C718",
          "comments": "Drug or Chemical by Structure[C1913]|Organic Chemical",
          "type": "CONCEPT",
          "url": "https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C718",
          "code_system": "NCI_THESAURUS",
          "references": [
            "e9b281ef-c77d-4618-bdda-40143644adbc"
          ]
        },
        {
          "uuid": "01c6adb1-8430-4a12-ad0f-e74b8c8b7efd",
          "code": "ZH67814I0O",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "1285f299-cb1a-c6d3-81b7-494410fe3cae",
          "code": "30362",
          "type": "PRIMARY",
          "url": "https://www.ebi.ac.uk/chebi/chebiOntology.do?chebiId=CHEBI:30362",
          "code_system": "CHEBI",
          "references": [
            "e9b281ef-c77d-4618-bdda-40143644adbc"
          ]
        },
        {
          "uuid": "a6e79bd9-9a14-b33d-095e-e46064a8604a",
          "code": "119476",
          "type": "PRIMARY",
          "url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=119476",
          "code_system": "NSC",
          "references": [
            "13aff143-85b8-1c01-360c-d18b1bb2b368"
          ]
        },
        {
          "uuid": "9ed2fe15-3a8d-a5f6-1334-177adf67309c",
          "code": "ZH67814I0O",
          "type": "PRIMARY",
          "url": "https://dailymed.nlm.nih.gov/dailymed/search.cfm?adv=1&query=ZH67814I0O",
          "code_system": "DAILYMED",
          "references": [
            "5719bdf8-7119-309e-c52e-da05e5e7a652"
          ]
        },
        {
          "uuid": "da837108-dbb8-faba-68f4-76566eaa4946",
          "code": "100000138328",
          "type": "PRIMARY",
          "code_system": "SMS_ID",
          "references": [
            "c3adee68-6774-a5ce-e746-ab366854ff9c"
          ]
        }
      ],
      "relationships": [
        {
          "uuid": "317358cd-a16b-42b0-91a7-0e4e8fe9feb0",
          "type": "ACTIVE MOIETY",
          "related_substance": {
            "uuid": "a76f2ae7-675f-4fa6-9d97-b499d0f6569b",
            "refuuid": "de85c69c-9c67-4616-ad90-7aff699e179c",
            "name": "ISOPENTANE",
            "unii": "ZH67814I0O",
            "linking_id": "ZH67814I0O",
            "ref_pname": "ISOPENTANE",
            "substance_class": "reference"
          }
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "4c3a5c78-c368-4739-8d48-df39b2d829f8",
          "name": "2-METHYLBUTANE",
          "stdName": "2-METHYLBUTANE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f3e7bb70-1eb3-4dba-ba96-48e5251cda2a",
            "793787db-8946-4680-90f3-8218d3f8bf00"
          ],
          "display_name": false
        },
        {
          "uuid": "6cf3a22c-8d4c-443d-b81a-882f91041dc1",
          "name": "BUTANE, 2-METHYL",
          "stdName": "BUTANE, 2-METHYL",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f3e7bb70-1eb3-4dba-ba96-48e5251cda2a",
            "7d595e9c-9634-402a-bc51-7305ded8ec82"
          ],
          "display_name": false
        },
        {
          "uuid": "9d9a0b37-6f3f-442e-bd7f-7459a5bf04c7",
          "name": "ISOPENTANE",
          "stdName": "ISOPENTANE",
          "type": "of",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "dc0d68a7-f2ef-4931-a438-ef1bbb6da289",
            "f3e7bb70-1eb3-4dba-ba96-48e5251cda2a",
            "e474be62-2107-4b6f-a0f5-a8c31b392bcd",
            "793787db-8946-4680-90f3-8218d3f8bf00",
            "d73aa5e5-2e42-4185-8d21-9ff1651afcde",
            "3335daee-2160-4935-a210-76a93cca8d46"
          ],
          "display_name": true,
          "domains": [
            "cosmetic"
          ],
          "name_orgs": [
            {
              "uuid": "4c773f9c-bd11-4b2a-853f-5ab4ffe0d705",
              "name_org": "INCI"
            }
          ]
        },
        {
          "uuid": "8535e67b-4549-4bda-acf8-0a163ce831fb",
          "name": "ISOPENTANE [HSDB]",
          "stdName": "ISOPENTANE [HSDB]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "dc0d68a7-f2ef-4931-a438-ef1bbb6da289",
            "f3e7bb70-1eb3-4dba-ba96-48e5251cda2a"
          ],
          "display_name": false
        },
        {
          "uuid": "349b3a4f-5c75-4d92-9cb4-3bddaa013026",
          "name": "METHYLBUTANE",
          "stdName": "METHYLBUTANE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f3e7bb70-1eb3-4dba-ba96-48e5251cda2a",
            "7d595e9c-9634-402a-bc51-7305ded8ec82"
          ],
          "display_name": false
        },
        {
          "uuid": "0e6c39b9-6731-466d-b0e2-96daaef4d6d7",
          "name": "NSC-119476",
          "stdName": "NSC-119476",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f3e7bb70-1eb3-4dba-ba96-48e5251cda2a",
            "7d595e9c-9634-402a-bc51-7305ded8ec82"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "793787db-8946-4680-90f3-8218d3f8bf00",
          "citation": "HAWLEYS",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "f3e7bb70-1eb3-4dba-ba96-48e5251cda2a",
          "citation": "HAWLEY CONDENSED CHEMICAL DICTIONARY",
          "doc_type": "HAWLEY CONDENSED CHEMICAL DICTIONARY",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "7d595e9c-9634-402a-bc51-7305ded8ec82",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "3335daee-2160-4935-a210-76a93cca8d46",
          "citation": "PCPC",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "dc0d68a7-f2ef-4931-a438-ef1bbb6da289",
          "citation": "HSDB",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "f1dc8c45-e618-4795-a3ab-d05a5bd2fcb6",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390908000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "c3b7ec27-e6a5-434a-82f3-8757ddd72273",
          "citation": "SRS import [ZH67814I0O]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=ZH67814I0O",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390908000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "2728de10-d87e-450e-959f-b225d9d26228",
          "citation": "Hawleys",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "d73aa5e5-2e42-4185-8d21-9ff1651afcde",
          "citation": "ISOPENTANE [INCI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "e474be62-2107-4b6f-a0f5-a8c31b392bcd",
          "citation": "ISOPENTANE [HSDB]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "1663aef1-fab5-f167-0f1e-abc2edf9e7b9",
          "citation": "WEBSITE",
          "url": "https://toxnet.nlm.nih.gov/cgi-bin/sis/search2/r?dbs+hsdb:@term+@rn+@rel+78-78-4",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "3fb89a7c-f359-421e-8035-94e27fc4459c",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=78-78-4",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "e9b281ef-c77d-4618-bdda-40143644adbc",
          "doc_type": "SYSTEM",
          "public_domain": true
        },
        {
          "uuid": "33ace636-e12f-4b83-8400-cc0e4052e46d",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "13aff143-85b8-1c01-360c-d18b1bb2b368",
          "citation": "NCI",
          "doc_type": "NCI DRUG DICTIONARY",
          "public_domain": true
        },
        {
          "uuid": "5719bdf8-7119-309e-c52e-da05e5e7a652",
          "citation": "DailyMed",
          "doc_type": "DAILYMED",
          "public_domain": true
        },
        {
          "uuid": "c3adee68-6774-a5ce-e746-ab366854ff9c",
          "citation": "EU-SRS",
          "doc_type": "EMA LIST",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "fdf006f3-5c0e-4b45-b9e4-edfd92b86531",
          "id": "fdf006f3-5c0e-4b45-b9e4-edfd92b86531",
          "molfile": "\n  Marvin  01132113092D          \n\n  5  4  0  0  0  0            999 V2000\n    1.9899   -1.1106    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2754   -1.5231    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.5609   -1.1106    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -0.1535   -1.5231    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.5609   -0.2856    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  2  1  1  0  0  0  0\n  3  2  1  0  0  0  0\n  4  3  1  0  0  0  0\n  3  5  1  0  0  0  0\nM  END",
          "smiles": "CCC(C)C",
          "formula": "C5H12",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "521804b3-8f47-448d-a1c4-b83ade44c0ab"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "72.149",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "de85c69c-9c67-4616-ad90-7aff699e179c",
      "version": "10",
      "structure": {
        "id": "4285857c-4390-4365-9f85-36c3060c6132",
        "molfile": "\n  Marvin  01132103312D          \n\n  5  4  0  0  0  0            999 V2000\n   -0.1535   -1.5231    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.5609   -1.1106    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2754   -1.5231    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.9899   -1.1106    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.5609   -0.2856    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  1  2  1  0  0  0  0\n  2  3  1  0  0  0  0\n  3  4  1  0  0  0  0\n  2  5  1  0  0  0  0\nM  END",
        "smiles": "CCC(C)C",
        "formula": "C5H12",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "72.149",
        "optical_activity": "NONE",
        "references": [
          "c3b7ec27-e6a5-434a-82f3-8757ddd72273",
          "2728de10-d87e-450e-959f-b225d9d26228"
        ],
        "stereo_centers": 0
      },
      "unii": "ZH67814I0O"
    }
  ]
}