{
  "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": "1fdce505-a770-4c40-abf6-8324401c018b",
          "code": "14797-65-0",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=14797-65-0",
          "code_system": "CAS",
          "references": [
            "455b9f73-c4a1-42f8-9586-328090653f09",
            "3bcdf978-0d57-4a68-9fcc-428553be6d2a"
          ]
        },
        {
          "uuid": "154f456c-eb51-4e07-bfac-e1dcfe620d66",
          "code": "NITRITE",
          "type": "PRIMARY",
          "url": "https://en.wikipedia.org/wiki/Nitrite",
          "code_system": "WIKIPEDIA",
          "references": [
            "455b9f73-c4a1-42f8-9586-328090653f09"
          ]
        },
        {
          "uuid": "8defb5a0-98e5-49e2-90af-181d9c7b110d",
          "code": "1546424",
          "comments": "RxNorm",
          "type": "PRIMARY",
          "url": "https://rxnav.nlm.nih.gov/REST/rxcui/1546424/allProperties.xml?prop=all",
          "code_system": "RXCUI",
          "references": [
            "455b9f73-c4a1-42f8-9586-328090653f09"
          ]
        },
        {
          "uuid": "b2cdb7af-d9f3-44f0-ace1-6760099487da",
          "code": "SUB127990",
          "type": "PRIMARY",
          "code_system": "EVMPD",
          "references": [
            "455b9f73-c4a1-42f8-9586-328090653f09"
          ]
        },
        {
          "uuid": "01d48c40-506c-4f29-8189-95088524f64b",
          "code": "21 CFR 862.1510",
          "comments": "PART 862 -- CLINICAL CHEMISTRY AND CLINICAL TOXICOLOGY DEVICES|Subpart B--Clinical Chemistry Test Systems|Sec. 862.1510 Nitrite (nonquantitative) test system.",
          "type": "PRIMARY",
          "url": "http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?fr=862.1510",
          "code_system": "CFR",
          "references": [
            "455b9f73-c4a1-42f8-9586-328090653f09"
          ]
        },
        {
          "uuid": "a820ac97-d280-42ec-ba1d-16c8a2258d9e",
          "code": "946",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/946",
          "code_system": "PUBCHEM",
          "references": [
            "455b9f73-c4a1-42f8-9586-328090653f09"
          ]
        },
        {
          "uuid": "b58a0dff-d9f6-c4cc-b2f1-a61cf6427ca1",
          "code": "DTXSID5024219",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID5024219",
          "code_system": "EPA CompTox",
          "references": [
            "efdf4e39-106f-0606-abf5-b8e99c61cc6b"
          ]
        },
        {
          "uuid": "29938c48-c822-4e1a-0357-3f168d5c9ac3",
          "code": "C1916",
          "comments": "Drug or Chemical by Structure[C1913]|Organic Chemical[C718]|Nitrogen Compound",
          "type": "CONCEPT",
          "url": "https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C1916",
          "code_system": "NCI_THESAURUS",
          "references": [
            "966b352f-32e2-c993-efd6-a407f2805356"
          ]
        },
        {
          "uuid": "d94fed88-ab79-eb00-d524-98a426c58c36",
          "code": "2657-5",
          "comments": "LOINC|ACTIVE|CHEM|Urine|Nitrite [Mass/volume] in Urine",
          "type": "PRIMARY",
          "url": "https://loinc.org/2657-5/",
          "code_system": "LOINC",
          "references": [
            "966b352f-32e2-c993-efd6-a407f2805356"
          ]
        },
        {
          "uuid": "525cb5ea-7fe9-7ace-7ada-2b9d5602d0e6",
          "code": "55948-4",
          "comments": "LOINC|ACTIVE|CHEM|Ser/Plas|Nitrite [Moles/volume] in Serum or Plasma",
          "type": "PRIMARY",
          "url": "https://loinc.org/55948-4/",
          "code_system": "LOINC",
          "references": [
            "966b352f-32e2-c993-efd6-a407f2805356"
          ]
        },
        {
          "uuid": "3ba9881f-ebc3-6925-24ab-f80d49ceab48",
          "code": "18370-7",
          "comments": "LOINC|ACTIVE|CHEM|Bld|Nitrite [Mass/volume] in Blood",
          "type": "PRIMARY",
          "url": "https://loinc.org/18370-7/",
          "code_system": "LOINC",
          "references": [
            "966b352f-32e2-c993-efd6-a407f2805356"
          ]
        },
        {
          "uuid": "62a4dd68-68de-47d8-3de1-f934c04e3dee",
          "code": "55947-6",
          "comments": "LOINC|ACTIVE|CHEM|Dial fld|Nitrite [Mass/volume] in Dialysis fluid",
          "type": "PRIMARY",
          "url": "https://loinc.org/55947-6/",
          "code_system": "LOINC",
          "references": [
            "966b352f-32e2-c993-efd6-a407f2805356"
          ]
        },
        {
          "uuid": "fdc252bc-9a3a-06a6-b6b2-906b8da00e67",
          "code": "13616-8",
          "comments": "LOINC|ACTIVE|CHEM|Water|Nitrite [Mass/volume] in Water",
          "type": "PRIMARY",
          "url": "https://loinc.org/13616-8/",
          "code_system": "LOINC",
          "references": [
            "966b352f-32e2-c993-efd6-a407f2805356"
          ]
        },
        {
          "uuid": "a193b7a1-6028-c009-20f7-cbc20820dd13",
          "code": "DB12529",
          "type": "PRIMARY",
          "url": "https://go.drugbank.com/drugs/DB12529",
          "code_system": "DRUG BANK",
          "references": [
            "966b352f-32e2-c993-efd6-a407f2805356"
          ]
        },
        {
          "uuid": "c4574e8e-36c8-4485-97b6-bda6994f177f",
          "code": "J39976L608",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "906f3aae-8f5f-6ed9-3503-0b04bc5d91f1",
          "code": "C120467",
          "type": "PRIMARY",
          "url": "https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C120467",
          "code_system": "NCI_THESAURUS",
          "references": [
            "6aadcca6-3529-7dee-4c3b-701fc836500e"
          ]
        },
        {
          "uuid": "6c645cbb-652f-a393-9aa0-fa9e2ef5143a",
          "code": "16301",
          "type": "PRIMARY",
          "url": "https://www.ebi.ac.uk/chebi/chebiOntology.do?chebiId=CHEBI:16301",
          "code_system": "CHEBI",
          "references": [
            "966b352f-32e2-c993-efd6-a407f2805356"
          ]
        },
        {
          "uuid": "c6a5b1f1-384c-3095-179c-f1b44a92ed6b",
          "code": "J39976L608",
          "type": "PRIMARY",
          "url": "https://dailymed.nlm.nih.gov/dailymed/search.cfm?adv=1&query=J39976L608",
          "code_system": "DAILYMED",
          "references": [
            "e09a8e6c-e85c-052f-0ec0-c597cc85b49a"
          ]
        },
        {
          "uuid": "1f82a724-e84f-22e5-a9b6-2927a82f1a47",
          "code": "100000153753",
          "type": "PRIMARY",
          "code_system": "SMS_ID",
          "references": [
            "8049d3d4-622c-69f6-d441-c09f4d0dcbfd"
          ]
        }
      ],
      "relationships": [
        {
          "uuid": "708138ea-8f61-4366-94bc-49cd589695ff",
          "type": "ACTIVE MOIETY",
          "related_substance": {
            "uuid": "c52361f7-bd2a-4eb1-b3f7-4a6bae9a6d96",
            "refuuid": "f5ba5672-25cb-42ca-a1b2-464c7927d035",
            "name": "NITRITE ION",
            "unii": "J39976L608",
            "linking_id": "J39976L608",
            "ref_pname": "NITRITE ION",
            "substance_class": "reference"
          }
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "4b72046b-61cd-419b-b317-1df833f68a45",
          "name": "NITRITE",
          "stdName": "NITRITE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f83716ec-ac26-410e-9959-6e3aed53971d",
            "01602e7e-b192-44cf-8557-dae886de5f16"
          ],
          "display_name": false
        },
        {
          "uuid": "150e51bc-85a9-48c5-a956-1c5e8202076e",
          "name": "NITRITE (NO2-)",
          "stdName": "NITRITE (NO2-)",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f83716ec-ac26-410e-9959-6e3aed53971d",
            "01602e7e-b192-44cf-8557-dae886de5f16"
          ],
          "display_name": false
        },
        {
          "uuid": "349a156e-2fe6-4c39-84ed-4946828b6aaa",
          "name": "NITRITE ANION",
          "stdName": "NITRITE ANION",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f83716ec-ac26-410e-9959-6e3aed53971d",
            "01602e7e-b192-44cf-8557-dae886de5f16"
          ],
          "display_name": false
        },
        {
          "uuid": "83e12447-99d2-4a3f-84b4-0f15862c35b9",
          "name": "NITRITE ION",
          "stdName": "NITRITE ION",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f83716ec-ac26-410e-9959-6e3aed53971d",
            "01602e7e-b192-44cf-8557-dae886de5f16"
          ],
          "display_name": true
        },
        {
          "uuid": "612449c0-1622-41c6-bdb1-e43843c24b99",
          "name": "NITRITE ION (NO2-)",
          "stdName": "NITRITE ION (NO2-)",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f83716ec-ac26-410e-9959-6e3aed53971d",
            "01602e7e-b192-44cf-8557-dae886de5f16"
          ],
          "display_name": false
        },
        {
          "uuid": "ff43745b-0ce7-4ad3-8ce1-28a6e21f833f",
          "name": "NITROUS ACID, ION(1-)",
          "stdName": "NITROUS ACID, ION(1-)",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f83716ec-ac26-410e-9959-6e3aed53971d",
            "01602e7e-b192-44cf-8557-dae886de5f16"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "f83716ec-ac26-410e-9959-6e3aed53971d",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "01602e7e-b192-44cf-8557-dae886de5f16",
          "citation": "STN (SCIFINDER)",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "455b9f73-c4a1-42f8-9586-328090653f09",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391590000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "8e342155-d041-4414-95a7-fb2e68abae92",
          "citation": "SRS import [J39976L608]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=J39976L608",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391590000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "efdf4e39-106f-0606-abf5-b8e99c61cc6b",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=14797-65-0",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "966b352f-32e2-c993-efd6-a407f2805356",
          "doc_type": "SYSTEM",
          "public_domain": true
        },
        {
          "uuid": "3bcdf978-0d57-4a68-9fcc-428553be6d2a",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "6aadcca6-3529-7dee-4c3b-701fc836500e",
          "citation": "NCIT",
          "doc_type": "NCI THESAURUS",
          "public_domain": true
        },
        {
          "uuid": "e09a8e6c-e85c-052f-0ec0-c597cc85b49a",
          "citation": "DailyMed",
          "doc_type": "DAILYMED",
          "public_domain": true
        },
        {
          "uuid": "8049d3d4-622c-69f6-d441-c09f4d0dcbfd",
          "citation": "EU-SRS",
          "doc_type": "EMA LIST",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "53dce1c8-e647-496f-b11e-90855146867f",
          "id": "53dce1c8-e647-496f-b11e-90855146867f",
          "molfile": "\n  Marvin  01132104222D          \n\n  3  2  0  0  0  0            999 V2000\n    5.7276   -4.2704    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    6.4506   -4.6762    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    7.1642   -4.2704    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n  2  1  1  0  0  0  0\n  2  3  2  0  0  0  0\nM  END",
          "smiles": "N(=O)O",
          "formula": "HNO2",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "c5bdf989-5047-4e7d-88b8-db03beb52f18"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "47.0135",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "f5ba5672-25cb-42ca-a1b2-464c7927d035",
      "version": "16",
      "structure": {
        "id": "a1fbf3af-9898-4a79-9c6d-d65a80ce7632",
        "molfile": "\n  Marvin  01132108252D          \n\n  3  2  0  0  0  0            999 V2000\n    7.1642   -4.2704    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    6.4506   -4.6762    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    5.7276   -4.2704    0.0000 O   0  5  0  0  0  0  0  0  0  0  0  0\n  2  1  2  0  0  0  0\n  2  3  1  0  0  0  0\nM  CHG  1   3  -1\nM  END",
        "smiles": "N(=O)[O-]",
        "formula": "NO2",
        "atropisomerism": "No",
        "charge": -1,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "46.0055",
        "optical_activity": "NONE",
        "references": [
          "f83716ec-ac26-410e-9959-6e3aed53971d",
          "8e342155-d041-4414-95a7-fb2e68abae92"
        ],
        "stereo_centers": 0
      },
      "unii": "J39976L608"
    }
  ]
}