Imidazole

Imidazole is an organic compound with the molecular formula C3H4N2.

Formula
C3H4N2
Molar mass
68.08 g/mol
Also known as
1H-imidazole, Glyoxaline, Imidazol, Iminazole, Miazole, 1,3-Diazole

Overview

Imidazole is an organic compound with the molecular formula C3H4N2.

Identifiers

Formula
C3H4N2
Molar mass
68.08 g/mol
Also known as
1H-imidazole, Glyoxaline, Imidazol, Iminazole, Miazole, 1,3-Diazole
Chemical identifiers
SMILES
C1=CN=CN1
InChI
InChI=1S/C3H4N2/c1-2-5-3-4-1/h1-3H,(H,4,5)
PubChem CID
795

Properties

Melting Point
89.52 °C
Boiling Point
257 °C
Relative density (water = 1)
Relative density (water = 1): 1.03
Water solubility
In water, 663 g/L at 20 °C

References

  1. PubChem Compound Summary: Imidazole (CID 795)National Center for Biotechnology Information · PubChem

    Identity, molecular formula, molecular weight and aliases retrieved via PUG REST on 2026-09-08.

  2. Hazardous Substances Data Bank (HSDB): Imidazole — melting pointHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/795#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-318

  3. Hazardous Substances Data Bank (HSDB): Imidazole — boiling pointHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/795#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-318

  4. ILO-WHO International Chemical Safety Cards (ICSCs): Imidazole — densityILO-WHO International Chemical Safety Cards (ICSCs)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/795#section=Density. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred.

  5. Hazardous Substances Data Bank (HSDB): Imidazole — solubilityHazardous Substances Data Bank (HSDB)

    Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/795#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: OECD; Screening Information Data Set (SIDS) Initial Assessment Report for SIDS Initial Assessment Meeting (SIAM) 17 Imidazole (CAS number 288-32-4) (2003). Available from, as of July 30, 2018: https://www.inchem.org/pages/sids.html