{"Abbreviation":"","Aliases":["Azabenzene","Azine","Pyridin","Piridina","Pirydyna","RCRA waste number U196","NCI-C55301","FEMA No. 2966","FEMA Number 2966","CP 32","AI3-01240","pyridine ion (1-), hydrogen","203-809-9","pyridine-ring","pyridine-","Pyridine [UN1282] ","Caswell No. 717","CCRIS 2926","Pyridine, ACS reagent, \u003e=99.0%","Pyridine, ReagentPlus(R), \u003e=99%","UN1282","RCRA waste no. U196","EPA Pesticide Chemical Code 069202","hydropyridine","N-pyridine"],"Biological Half-Life":"Whole body: less than 24 hours; [TDR, p. 1062]","Boiling Point":"239 °","CAS":"110-86-1","ChEBI":"CHEBI:16227","ChEMBL":"CHEMBL266158","ChemicalClasses":["pyridine"],"Chirality":"achiral","Color/Form":"Colorless to yellow liquid.","Decomposition":"When pyridine is heated to decomposition, cyanide fumes are released.","Density":"0.983 at 68 °F (USCG, 1999) - Less dense than water; will float g/cm\u003csup\u003e3\u003c/sup\u003e","EINECS":"203-809-9","Erowid Experience Reports":null,"Esters":[],"European Community (EC) Number":"203-809-9","Flash Point":"68 °F (NTP, 1992)","Formating":[],"HMDB ID":"HMDB0000926","HeavyAtomCount":6,"IUPACName":"pyridine","InChI":"InChI=1S/C5H5N/c1-2-4-6-5-3-1/h1-5H","InChIKey":"JUJWROOIHBZHMG-UHFFFAOYSA-N","Melting Point":"-44 °F (NTP, 1992)","MolecularFormula":"C\u003csub\u003e5\u003c/sub\u003eH\u003csub\u003e5\u003c/sub\u003eN","MolecularWeight":"79.10 g/mol","Odor":"Sharp, nauseating","Physical Description":"Pyridine appears as a clear colorless to light yellow liquid with a penetrating nauseating odor. Vapors are heavier than air. Toxic by ingestion and inhalation. Combustion produces toxic oxides of nitrogen.","PubChemId":1049,"RefCount":3,"RefCur":"","References":[{"Name":"Wikipedia","Urls":[{"Link":"https://en.wikipedia.org/wiki/Pyridine","Name":"Pyridine","Sub":false}]},{"Name":"PubChem","Urls":[{"Link":"https://pubchem.ncbi.nlm.nih.gov/compound/1049","Name":"Pyridine","Sub":false}]},{"Name":"ChEMBL","Urls":[{"Link":"https://www.ebi.ac.uk/chembl/explore/compound/CHEMBL266158","Name":"Pyridine","Sub":false}]},{"Name":"ChEBI","Urls":[{"Link":"https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:16227","Name":"Pyridine","Sub":false}]},{"Name":"Common Chemistry","Urls":[{"Link":"https://commonchemistry.cas.org/detail?cas_rn=110-86-1","Name":"Pyridine","Sub":false}]},{"Name":"HMDB","Urls":[{"Link":"https://hmdb.ca/metabolites/HMDB0000926","Name":"Pyridine","Sub":false}]},{"Name":"KEGG","Urls":[{"Link":"https://www.kegg.jp/entry/C00747","Name":"Pyridine","Sub":false}]},{"Name":"UNII","Urls":[{"Link":"https://gsrs.ncats.nih.gov/ginas/app/ui/substances/NH9L3PP67S","Name":"Pyridine","Sub":false}]},{"Name":"EPA DSSTox","Urls":[{"Link":"https://comptox.epa.gov/dashboard/chemical/details/DTXSID9021924","Name":"Pyridine","Sub":false}]}],"Refs":["National Center for Biotechnology Information. PubChem Compound Summary for CID 1049, Pyridine. Accessed July 19, 2025. \u003ca href=https://pubchem.ncbi.nlm.nih.gov/compound/1049\u003ehttps://pubchem.ncbi.nlm.nih.gov/compound/1049\u003c/a\u003e","U.S. Food and Drug Administration; National Center for Advancing Translational Sciences. Pyridine. UNII: NH9L3PP67S. Global Substance Registration System. Accessed July 19, 2025. \u003ca href=https://gsrs.ncats.nih.gov/ginas/app/beta/substances/NH9L3PP67S\u003ehttps://gsrs.ncats.nih.gov/ginas/app/beta/substances/NH9L3PP67S\u003c/a\u003e"],"SMILES":"C1=CC=NC=C1","SaltData":[],"Salts":[],"Solubility":"greater than or equal to 100 mg/mL at 70.7 °F (NTP, 1992)","Stability/Shelf Life":"Mixtures with formamide + iodine + sulfur trioxide are storage hazards, releasing carbon dioxide \u0026 sulfuric acid.","StereoisomerData":[],"Stereoisomers":[],"Structure":"\u003csvg xmlns=\"http://www.w3.org/2000/svg\" preserveAspectRatio=\"none\" style=\"display:block\" viewBox=\"0 0 28.478 34.511\"\u003e\u003crect width=\"100%\" height=\"100%\" fill=\"#fff\"/\u003e\u003cdesc\u003eGenerated by the Chemistry Development Kit (http://github.com/cdk)\u003c/desc\u003e\u003cg fill=\"#3050f8\" stroke=\"#000\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\".7\"\u003e\u003cpath fill=\"#fff\" stroke=\"none\" d=\"M0 0h29v35H0z\"/\u003e\u003cg class=\"mol\"\u003e\u003cg class=\"bond\"\u003e\u003cpath d=\"m27.439 8.654-13.2-7.616M25.001 10.062 14.239 3.853\"/\u003e\u003c/g\u003e\u003cpath d=\"M27.439 8.654v15.231\" class=\"bond\"/\u003e\u003cg class=\"bond\"\u003e\u003cpath d=\"m17.392 29.682 10.047-5.797M16.174 27.57l8.827-5.093\"/\u003e\u003cpath stroke=\"#3050f8\" d=\"m17.392 29.682 5.024-2.898M16.174 27.57l4.413-2.547\" class=\"hi\"/\u003e\u003c/g\u003e\u003cpath d=\"M11.085 29.682 1.038 23.885\" class=\"bond\"/\u003e\u003cg class=\"bond\"\u003e\u003cpath d=\"M1.038 8.654v15.231M3.477 10.062v12.415\"/\u003e\u003c/g\u003e\u003cpath d=\"M14.239 1.038 1.038 8.654\" class=\"bond\"/\u003e\u003cpath stroke=\"none\" d=\"M16.18 33.951h-.721l-2.619-4.066h-.03l.03.595q.024.357.024.732v2.739h-.566v-4.9h.714l2.608 4.055h.03l-.018-.328-.024-.476q-.006-.262-.006-.482v-2.769h.578z\" class=\"atom\"/\u003e\u003cpath stroke=\"#3050f8\" d=\"m11.085 29.682-5.023-2.898\" class=\"hi\"/\u003e\u003c/g\u003e\u003c/g\u003e\u003c/svg\u003e","Taste":"AMINE TASTE","Title":"Pyridine","UNII":"NH9L3PP67S","Wikipedia":"Pyridine","XLogP":0.7,"pH":"8.5 (0.2 molar soln in water)"}