Explore relationships

Pyrrole

Names Preferred IUPAC name1H-PyrroleOther names AzoleImidoleIdentifiers CAS Number109-97-73D model (JSmol)Interactive imageInteractive imageBeilstein Reference1159 ChEBICHEBI:19203ChEMBLChEMBL16225ChemSpider7736ECHA InfoCard100.003.387EC Number203-724-7Gmelin Reference1705 PubChemCID8027RTECS numberUX9275000UNII86S1ZD6L2CUN number1992, 1993 CompTox Dashboard(EPA)DTXSID5021910InChIInChI=1S/C4H5N/c1-2-4-5-3-1/h1-5HKey: KAESVJOAVNADME-UHFFFAOYSA-NInChI=1/C4H5N/c1-2-4-5-3-1/h1-5HSMILESN1C=CC=C1[nH]1cccc1Properties Chemical formulaC4H5NMolar mass67.091 g·mol Appearance colorless volatile liquid Density0.967 g cm Melting point−23 °C (−9 °F; 250 K) Boiling point129 to 131 °C (264 to 268 °F; 402 to 404 K) Vapor pressure7 mmHg at 23 °C Acidity (pKa) 17.5 (for the N−H proton) Basicity (pKb) 13.6 (pKa 0.4 for C.A.) Magnetic susceptibility (χ)−47.6×10 cm molViscosity0.001225 Pa s Thermochemistry Heat capacity(C)1.903 J K mol Std enthalpy offormation(ΔfH298)108.2 kJ mol (gas) Std enthalpy ofcombustion(ΔcH298)2242 kJ mol Hazards NFPA 704 (fire diamond) 220Flash point33.33 °C (91.99 °F; 306.48 K) Autoignitiontemperature550 °C (1,022 °F; 823 K) Explosive limits3.1–14.8% Safety data sheet (SDS) Chemical Safety DataRelated compounds Related compoundsPhosphole, arsole, bismole, stiboleExcept where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Yverify ( ?)

Use + to expand a branch. Click a topic name to open its summary.