{
  "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": "6bc62be0-5ffb-4e66-bf73-1c317919ca45",
          "code": "C77476",
          "type": "PRIMARY",
          "url": "https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C77476",
          "code_system": "NCI_THESAURUS",
          "references": [
            "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d"
          ]
        },
        {
          "uuid": "a03322dc-5675-4ce1-85a5-0181452d8226",
          "code": "74-87-3",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=74-87-3",
          "code_system": "CAS",
          "references": [
            "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d",
            "b451cb12-680c-4a83-9db1-344b81dafacb"
          ]
        },
        {
          "uuid": "8d5c3b07-29b7-418d-ad0e-e0f93f9a07d2",
          "code": "D008737",
          "type": "PRIMARY",
          "url": "http://www.ncbi.nlm.nih.gov/mesh/68008737",
          "code_system": "MESH",
          "references": [
            "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d"
          ]
        },
        {
          "uuid": "330dd91c-d3cb-4447-b4d8-f0bea73b711b",
          "code": "CHLOROMETHANE",
          "type": "PRIMARY",
          "url": "https://en.wikipedia.org/wiki/Chloromethane",
          "code_system": "WIKIPEDIA",
          "references": [
            "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d"
          ]
        },
        {
          "uuid": "aa77e156-d0be-4f1b-b04e-f145ea1fd31b",
          "code": "200-817-4",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.000.744",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d"
          ]
        },
        {
          "uuid": "b0dce817-652b-456c-9cd6-20a37d36c949",
          "code": "1305751",
          "comments": "RxNorm",
          "type": "PRIMARY",
          "url": "https://rxnav.nlm.nih.gov/REST/rxcui/1305751/allProperties.xml?prop=all",
          "code_system": "RXCUI",
          "references": [
            "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d"
          ]
        },
        {
          "uuid": "56cca511-5d54-401e-8d04-38ba1f9c8144",
          "code": "m7382",
          "comments": "Merck Index",
          "type": "PRIMARY",
          "url": "https://merckindex.rsc.org/monographs/m7382?q=authorize",
          "code_system": "MERCK INDEX",
          "references": [
            "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d"
          ]
        },
        {
          "uuid": "9a8be844-ce00-42a0-97f4-08b70eb365c2",
          "code": "6327",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/6327",
          "code_system": "PUBCHEM",
          "references": [
            "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d"
          ]
        },
        {
          "uuid": "65bf3d8c-29b8-d6d8-9720-b8193643b60e",
          "code": "883",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/source/hsdb/883",
          "code_system": "HSDB",
          "references": [
            "9cb7e88f-e80a-95ad-f573-1d229fb38c94"
          ]
        },
        {
          "uuid": "cf2363db-c22a-68bc-baea-931baf32a454",
          "code": "DTXSID0021541",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID0021541",
          "code_system": "EPA CompTox",
          "references": [
            "28613b4a-724a-91f1-d989-850352bb2e14"
          ]
        },
        {
          "uuid": "3a8fde20-7298-288c-d150-96c1e85714a2",
          "code": "Methyl chloride",
          "comments": "IARC|GROUP 3 ( Not classifiable as to its carcinogenicity to humans)",
          "type": "PRIMARY",
          "code_system": "IARC",
          "references": [
            "f3b08d2b-4ceb-8021-c521-7a4a593e0341"
          ]
        },
        {
          "uuid": "629ebc87-f894-26b3-4e6d-db684a399b64",
          "code": "C45678",
          "comments": "Industrial Aid",
          "type": "CONCEPT",
          "url": "https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C45678",
          "code_system": "NCI_THESAURUS",
          "references": [
            "5b64ceed-146d-2114-7875-825bfb16406c"
          ]
        },
        {
          "uuid": "9c4615f9-18bd-4be7-860f-a0dba64a7110",
          "code": "A6R43525YO",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "c2ba4a3c-28bd-b2cb-f461-5c520de3c1fa",
          "code": "36014",
          "type": "PRIMARY",
          "url": "https://www.ebi.ac.uk/chebi/chebiOntology.do?chebiId=CHEBI:36014",
          "code_system": "CHEBI",
          "references": [
            "5b64ceed-146d-2114-7875-825bfb16406c"
          ]
        },
        {
          "uuid": "a4a2a308-ed93-d695-7cb4-c34b65bb3d13",
          "code": "300000051177",
          "type": "PRIMARY",
          "code_system": "SMS_ID",
          "references": [
            "1a93605c-3106-d72f-e89f-98632d9207e8"
          ]
        }
      ],
      "relationships": [
        {
          "uuid": "2390d8cc-95eb-591a-a7a5-f279508f8336",
          "amount": {
            "uuid": "7967e93e-4ad5-40ce-ae1e-e5fc6db7d1f2"
          },
          "type": "PARENT->IMPURITY",
          "related_substance": {
            "uuid": "7f38aa1c-949c-4352-ab57-6bf988dcd747",
            "refuuid": "77ab65c8-4637-4710-9df5-29521c602204",
            "name": "Nilotinib hydrochloride monohydrate",
            "unii": "5JHU0N1R6K",
            "linking_id": "5JHU0N1R6K",
            "ref_pname": "Nilotinib hydrochloride monohydrate"
          }
        },
        {
          "uuid": "df537388-c76e-42db-aa8d-a4881cfd67f3",
          "amount": {
            "uuid": "8023243e-2d46-4b37-9ca6-17b11a7e4e57"
          },
          "type": "PARENT->IMPURITY",
          "related_substance": {
            "uuid": "2af8e482-35fe-4f1d-93ea-ed5efabc071f",
            "refuuid": "5c37c692-0c0f-4b97-9215-18e47d8580f3",
            "name": "DAPSONE",
            "unii": "8W5C518302",
            "linking_id": "8W5C518302",
            "ref_pname": "DAPSONE",
            "substance_class": "reference"
          }
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "3254f89f-e529-4697-a317-8e87d825210b",
          "name": "CHLOROMETHANE",
          "stdName": "CHLOROMETHANE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "a621a1cc-6021-43b1-a3d5-049a227d2909",
            "5012480f-0df6-4717-85a7-9b8319710541"
          ],
          "display_name": false
        },
        {
          "uuid": "9f757ff2-1386-4ca8-a0bf-8d0fe2adfadf",
          "name": "METHYL CHLORIDE [HSDB]",
          "stdName": "METHYL CHLORIDE [HSDB]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "45017645-f2c1-43a1-9728-ba6e053ca195",
            "12ccf290-c5a3-4c67-bc4b-02c88837a7f4"
          ],
          "display_name": false
        },
        {
          "uuid": "343d22fb-34ec-fa7f-5ce1-03f8f8cef4f1",
          "name": "METHYL CHLORIDE [IARC]",
          "stdName": "METHYL CHLORIDE [IARC]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f3b08d2b-4ceb-8021-c521-7a4a593e0341"
          ],
          "display_name": false
        },
        {
          "uuid": "ec81a21c-61c7-4c78-a4ae-e9083ac81a3a",
          "name": "METHYL CHLORIDE [II]",
          "stdName": "METHYL CHLORIDE [II]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "caab5cd3-0309-4a59-ac65-1c80f314a080"
          ],
          "display_name": false
        },
        {
          "uuid": "26f7ece8-37c5-4e28-92e4-fa7509015f2a",
          "name": "METHYL CHLORIDE [MART.]",
          "stdName": "METHYL CHLORIDE [MART.]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "4d483714-9cd0-4d45-b47b-8e0832504ae3"
          ],
          "display_name": false
        },
        {
          "uuid": "d25b389f-6bd6-4e7c-ac6f-4bfb07a60ccc",
          "name": "METHYL CHLORIDE [MI]",
          "stdName": "METHYL CHLORIDE [MI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "45017645-f2c1-43a1-9728-ba6e053ca195",
            "56880e33-e832-4130-9f9e-ad9983c22a78"
          ],
          "display_name": false
        },
        {
          "uuid": "2e08545f-0f5d-4617-8b08-f5fe4fcb7115",
          "name": "Methyl chloride",
          "stdName": "METHYL CHLORIDE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "72962de7-bd97-4455-acdf-dddbd27c109a",
            "1d346163-0e88-463f-898d-09b9feb478a1",
            "8aaa15e2-6970-4fce-8e27-e8fb374fd4cf",
            "12ccf290-c5a3-4c67-bc4b-02c88837a7f4",
            "53998e70-b295-4e63-9814-b7a31cf041d8",
            "4d483714-9cd0-4d45-b47b-8e0832504ae3",
            "56880e33-e832-4130-9f9e-ad9983c22a78",
            "45017645-f2c1-43a1-9728-ba6e053ca195",
            "caab5cd3-0309-4a59-ac65-1c80f314a080"
          ],
          "display_name": true
        }
      ],
      "references": [
        {
          "uuid": "caab5cd3-0309-4a59-ac65-1c80f314a080",
          "citation": "ChemIDplus 2008",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "a621a1cc-6021-43b1-a3d5-049a227d2909",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "5012480f-0df6-4717-85a7-9b8319710541",
          "citation": "STN 2007",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "4d483714-9cd0-4d45-b47b-8e0832504ae3",
          "citation": "MARTINDALE 2011",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "56880e33-e832-4130-9f9e-ad9983c22a78",
          "citation": "MERCK INDEX",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "45017645-f2c1-43a1-9728-ba6e053ca195",
          "citation": "MERCK INDEX",
          "doc_type": "MERCK INDEX",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "12ccf290-c5a3-4c67-bc4b-02c88837a7f4",
          "citation": "HSDB",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "1e82c58a-5d0e-4bcc-ac69-6d95ead4f50d",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493389663000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "7d27a202-dcce-44f2-b1bd-ea2f1a339754",
          "citation": "SRS import [A6R43525YO]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=A6R43525YO",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493389663000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "8aaa15e2-6970-4fce-8e27-e8fb374fd4cf",
          "citation": "METHYL CHLORIDE [MART.]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "72962de7-bd97-4455-acdf-dddbd27c109a",
          "citation": "METHYL CHLORIDE [MI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "53998e70-b295-4e63-9814-b7a31cf041d8",
          "citation": "METHYL CHLORIDE [II]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "1d346163-0e88-463f-898d-09b9feb478a1",
          "citation": "METHYL CHLORIDE [HSDB]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "9cb7e88f-e80a-95ad-f573-1d229fb38c94",
          "citation": "WEBSITE",
          "url": "https://toxnet.nlm.nih.gov/cgi-bin/sis/search2/r?dbs+hsdb:@term+@rn+@rel+74-87-3",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "28613b4a-724a-91f1-d989-850352bb2e14",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=74-87-3",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "f3b08d2b-4ceb-8021-c521-7a4a593e0341",
          "citation": "IARC",
          "doc_type": "IARC",
          "public_domain": true
        },
        {
          "uuid": "5b64ceed-146d-2114-7875-825bfb16406c",
          "doc_type": "SYSTEM",
          "public_domain": true
        },
        {
          "uuid": "b451cb12-680c-4a83-9db1-344b81dafacb",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "7f86e991-371e-89ab-495a-7400752a8ef7",
          "citation": "DailyMed",
          "doc_type": "DAILYMED",
          "public_domain": true
        },
        {
          "uuid": "1a93605c-3106-d72f-e89f-98632d9207e8",
          "citation": "SMS",
          "doc_type": "EMA LIST",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "c797cc39-5aa0-4008-81fe-66e1dbb68753",
          "id": "c797cc39-5aa0-4008-81fe-66e1dbb68753",
          "molfile": "\n  Marvin  01132110192D          \n\n  2  1  0  0  0  0            999 V2000\n    0.8250    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.0000    0.0000    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0\n  1  2  1  0  0  0  0\nM  END",
          "smiles": "CCl",
          "formula": "CH3Cl",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "52d3a01c-5a02-4341-9c10-10ff2b31e6be"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "50.4875",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "22f4f3a3-197e-48af-a3c1-0b499f390cdf",
      "version": "48",
      "structure": {
        "id": "e2c5ecf7-1529-4fd4-8f02-9352c0e4b340",
        "molfile": "\n  Marvin  01132111442D          \n\n  2  1  0  0  0  0            999 V2000\n    0.0000    0.0000    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0\n    0.8250    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  2  1  1  0  0  0  0\nM  END",
        "smiles": "CCl",
        "formula": "CH3Cl",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "50.4875",
        "optical_activity": "NONE",
        "references": [
          "7d27a202-dcce-44f2-b1bd-ea2f1a339754",
          "caab5cd3-0309-4a59-ac65-1c80f314a080"
        ],
        "stereo_centers": 0
      },
      "unii": "A6R43525YO"
    }
  ]
}