{"Abbreviation":"","Aliases":["Tetrahydropyrrole","Azacyclopentane","Azolidine","Tetramethylenimine","Butylenimine","Perhydropyrrole","Prolamine","1-Azacyclopentane","Pyrrolidine ring","Pyrrole, tetrahydro-","FEMA No. 3523","Pyrrole, tetrahydro","204-648-7","Tetrahydro pyrrole","Tetramethyleneimine","pyrrolidin","CCRIS 6688","UN1922","pyrolidine","pyrollidine","pyrroldine","pyrrolodine","Pirrolidine","Pyrrollidine","AI3-24117"],"Boiling Point":"86.56 °C","CAS":"123-75-1","ChEBI":"CHEBI:33135","ChEMBL":"CHEMBL22830","ChemicalClasses":["pyrrolidine"],"Chirality":"achiral","Color/Form":"Colorless to pale yellow liq","Decomposition":"When heated to decomposition it emits highly toxic fumes of /nitrogen oxides/.","Density":"0.8520 at 22.5 °C/4 °C g/cm\u003csup\u003e3\u003c/sup\u003e","EINECS":"204-648-7","Erowid Experience Reports":null,"Esters":[],"European Community (EC) Number":"204-648-7","Flash Point":"37 °F (NFPA, 2010)","Formating":[],"HMDB ID":"HMDB0031641","HeavyAtomCount":5,"IUPACName":"pyrrolidine","InChI":"InChI=1S/C4H9N/c1-2-4-5-3-1/h5H,1-4H2","InChIKey":"RWRDLPDLKQPQOW-UHFFFAOYSA-N","Melting Point":"-57.79 °C","MolecularFormula":"C\u003csub\u003e4\u003c/sub\u003eH\u003csub\u003e9\u003c/sub\u003eN","MolecularWeight":"71.12 g/mol","Odor":"Unpleasant, ammoniacal odor","Physical Description":"Pyrrolidine appears as a colorless to pale yellow liquid with an ammonia-like odor. Vapors heavier than air. Produces toxic oxides of nitrogen during combustion.","PubChemId":31268,"RefCount":3,"RefCur":"","References":[{"Name":"Wikipedia","Urls":[{"Link":"https://en.wikipedia.org/wiki/Pyrrolidine","Name":"Pyrrolidine","Sub":false}]},{"Name":"DrugBank","Urls":[{"Link":"https://go.drugbank.com/drugs/DB16858","Name":"Pyrrolidine","Sub":false}]},{"Name":"PubChem","Urls":[{"Link":"https://pubchem.ncbi.nlm.nih.gov/compound/31268","Name":"Pyrrolidine","Sub":false}]},{"Name":"ChEMBL","Urls":[{"Link":"https://www.ebi.ac.uk/chembl/explore/compound/CHEMBL22830","Name":"Pyrrolidine","Sub":false}]},{"Name":"ChEBI","Urls":[{"Link":"https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:33135","Name":"Pyrrolidine","Sub":false}]},{"Name":"Common Chemistry","Urls":[{"Link":"https://commonchemistry.cas.org/detail?cas_rn=123-75-1","Name":"Pyrrolidine","Sub":false}]},{"Name":"HMDB","Urls":[{"Link":"https://hmdb.ca/metabolites/HMDB0031641","Name":"Pyrrolidine","Sub":false}]},{"Name":"UNII","Urls":[{"Link":"https://gsrs.ncats.nih.gov/ginas/app/ui/substances/LJU5627FYV","Name":"Pyrrolidine","Sub":false}]},{"Name":"EPA DSSTox","Urls":[{"Link":"https://comptox.epa.gov/dashboard/chemical/details/DTXSID3059559","Name":"Pyrrolidine","Sub":false}]}],"Refs":["National Center for Biotechnology Information. PubChem Compound Summary for CID 31268, Pyrrolidine. Accessed July 19, 2025. \u003ca href=https://pubchem.ncbi.nlm.nih.gov/compound/31268\u003ehttps://pubchem.ncbi.nlm.nih.gov/compound/31268\u003c/a\u003e","U.S. Food and Drug Administration; National Center for Advancing Translational Sciences. Pyrrolidine. UNII: LJU5627FYV. Global Substance Registration System. Accessed July 19, 2025. \u003ca href=https://gsrs.ncats.nih.gov/ginas/app/beta/substances/LJU5627FYV\u003ehttps://gsrs.ncats.nih.gov/ginas/app/beta/substances/LJU5627FYV\u003c/a\u003e"],"SMILES":"C1CCNC1","SaltData":[{"AcidCount":1,"AmineCount":1,"Formula":"Cl","Name":"hydrochloride","Structure":"\u003csvg xmlns=\"http://www.w3.org/2000/svg\" preserveAspectRatio=\"none\" style=\"display:block\" viewBox=\"0 0 49.594 32.941\"\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=\"#1ff01f\" stroke=\"#000\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\".7\"\u003e\u003cpath fill=\"#fff\" stroke=\"none\" d=\"M0 0h50v33H0z\"/\u003e\u003cg class=\"mol\"\u003e\u003cpath d=\"M5.723 1.001h15.24M20.963 1.001l4.674 14.427M25.637 15.428l-9.225 6.785M10.274 22.213l-9.225-6.785M5.723 1.001 1.049 15.428\" class=\"bond\"/\u003e\u003cg fill=\"#3050f8\" stroke=\"none\" class=\"atom\"\u003e\u003cpath d=\"M15.284 26.92h-.721l-2.619-4.066h-.03l.03.596q.024.357.024.732v2.738h-.566v-4.899h.715l2.607 4.054h.03l-.018-.328-.024-.476q-.006-.262-.006-.482v-2.768h.578zM15.147 32.381h-.619v-2.286h-2.513v2.286h-.613v-4.899h.613v2.072h2.513v-2.072h.619z\"/\u003e\u003c/g\u003e\u003cpath stroke=\"#3050f8\" d=\"m16.412 22.213 4.612-3.392M10.274 22.213l-4.613-3.392\" class=\"hi\"/\u003e\u003c/g\u003e\u003cg class=\"mol\"\u003e\u003cg stroke=\"none\" class=\"atom\"\u003e\u003cpath d=\"M46.278 14.619q-.786 0-1.239.53-.452.524-.452 1.447 0 .91.417 1.446.422.53 1.268.53.321 0 .607-.053.292-.06.566-.143v.535q-.274.102-.566.149-.292.054-.697.054-.744 0-1.25-.31-.5-.309-.75-.875-.25-.571-.25-1.339 0-.744.268-1.31.274-.566.804-.881.53-.322 1.28-.322.78 0 1.351.286l-.244.524q-.226-.101-.506-.184-.274-.084-.607-.084m2.756 4.423h-.601v-5.215h.601zM43.37 19.042h-.619v-2.286h-2.512v2.286h-.613v-4.899h.613v2.072h2.512v-2.072h.619z\"/\u003e\u003c/g\u003e\u003c/g\u003e\u003c/g\u003e\u003c/svg\u003e","Title":"Pyrrolidine hydrochloride","UNII":"94N92BZG67"}],"Salts":["hydrochloride"],"Solubility":"Soluble in ethanol, ethyl ether; slightly soluble in benzene, chloroform","Stability/Shelf Life":"Fumes in air","StereoisomerData":[],"Stereoisomers":[],"Structure":"\u003csvg xmlns=\"http://www.w3.org/2000/svg\" preserveAspectRatio=\"none\" style=\"display:block\" viewBox=\"0 0 26.686 32.941\"\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 0h27v33H0z\"/\u003e\u003cg class=\"mol\"\u003e\u003cpath d=\"M5.723 1.001h15.24M20.963 1.001l4.674 14.427M25.637 15.428l-9.225 6.785M10.274 22.213l-9.225-6.785M5.723 1.001 1.049 15.428\" class=\"bond\"/\u003e\u003cg stroke=\"none\" class=\"atom\"\u003e\u003cpath d=\"M15.284 26.92h-.721l-2.619-4.066h-.03l.03.596q.024.357.024.732v2.738h-.566v-4.899h.715l2.607 4.054h.03l-.018-.328-.024-.476q-.006-.262-.006-.482v-2.768h.578zM15.147 32.381h-.619v-2.286h-2.513v2.286h-.613v-4.899h.613v2.072h2.513v-2.072h.619z\"/\u003e\u003c/g\u003e\u003cpath stroke=\"#3050f8\" d=\"m16.412 22.213 4.612-3.392M10.274 22.213l-4.613-3.392\" class=\"hi\"/\u003e\u003c/g\u003e\u003c/g\u003e\u003c/svg\u003e","Taste":"POWERFUL, AMMONIACAL TASTE","Title":"Pyrrolidine","UNII":"LJU5627FYV","Wikipedia":"Pyrrolidine","XLogP":0.5}